sugar would she need? Bob and Sparky go over how to read a measuring tape or a ruler using fractions. These typically aren't labeled but might be on some rulers (in which case you'd see numbers such as 1 1/2 in, 2 1/2 in, etc.). This is a convenient online ruler that could be calibrated to actual size, measurements in cm, mm and inch, the upper half is the millimeter ruler and centimeter ruler, the lower half is an inch ruler. Hannah received her MA in Japanese Studies from the University of Michigan and holds a bachelor's degree from the University of Southern California. The standard metric ruler is 30 cm long. 5 7/8 inches (also acceptable: 5 14/16 inches). FREE Shipping on orders over $25 shipped by Amazon. Here are four rulers that all measure in inches. The space between the lines is 1/16 inch which is smallest measurable part. It’s pretty obvious that knowing how to read a ruler is important to not just your grades in school but also your day-to-day life. Each of these tiny lines represents a fraction of an inch. In the event you do not need a large enough Ruler, make a short term chart and trace it on the surface in the large Ruler. Knowing how to read a ruler in cm is also helpful for people who'd prefer to not work with fractions (which you must do with inches) and who'd like to work with other units instead (in this case, millimeters). of an inch. There are millimeter (mm) and centimeter (cm) divisions on one side of it while the other side has divisions in inches (in) and its fractions. Each foot is broken down into inches. scale. You can also create guides in your document, which are especially useful for lining up objects, such as form fields. Make a line plot from this data and measure them. The 5 Strategies You Must Be Using to Improve 160+ SAT Points, How to Get a Perfect 1600, by a Perfect Scorer, Free Complete Official SAT Practice Tests. in 16th parts of an inch. This would mean that the phone is 4.5 cm (45 mm) wide. A web-based applet for the generation of downloadable vector rulers, suitable for laser etching Vector Ruler Generator Download a laser cuttable ruler to etch into your belongings and belts. Now then, here's what a typical metric ruler looks like: You can tell that this is a metric ruler because it’s divided into 30 equally spaced sections and has "cm" written on it (ignore the inches below). (Note that some rulers only go down to 1/8 inch lines, whereas others go down to 1/32 inch lines.).     find its perimeter. Instead, they are magnified to be “bigger” than the actual rulers, sugar would she need? paper should measure 29,7 centimeters or 11,6 inch vertically. Or what if you wanted to frame a photo you have? Also available as a printed copy.     on a tick mark, then read the mark that Inches correspond to the imperial system, which is the main measuring system used in the US and a smattering of other countries. lines with the rulers given. Next is 1/8 inch, which is the second-smallest unit of a ruler. This would mean that your finger is 3 7/16 inches long. In this case, you might have to measure the picture to see what kind of frame it would fit in. Meanwhile, centimeters are part of the metric system, which is used around the world in both everyday life and science. It’s an easy setting to change whenever you need to. Furthermore, it could help you learn more concerning the product that you are measuring.           three times, how much Measure the following This would mean that the corn is 6 1/8 inches long. All meet Fed. In one part there are some vertical lines. Also, find these same points on the ruler that measures Metric rulers usually have only centimeters and millimeters on them. Get an inch ruler. This would mean that the cloth is 10 1/4 (10.25) inches long. Example: Say you’re measuring a piece of cloth and the ruler ends at the fourth line after the 10-inch mark. Each inch is divided into 16 lines, meaning that the space between each line is 1/16 inch long—this is the smallest length you can measure with a ruler. These tiny lines that represent 1/16 inch come between all 1/8-inch lines: Example: You’re trying to measure the length of your pointer finger. 1 centimeter (cm) = 10 millimeters (mm) There are 2.54 centimeters in an inch. Check the length of your arm against a ruler or measuring tape to find out how close to 1 meter this distance is for you. Teach yourself how to use a ruler to measure inches.★ Want more FREE weekly math videos? A spread of Printable Ruler 24 Inches are available that may enable you to measure products like cooking time, the quantity of a single cup, or the volume of the vacuum container. 0 1 2 3 4 5 6 7 8 9 10 6 11 12 cm in 1 0 2 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Printable-Ruler.netClick, Print, Rule! The second-biggest unit on a ruler is the 1/2 inch, which is represented by the second-longest line. Zappos.com - Measure Your Shoe Size Because the foot is three-dimensional, any two-dimensional measuring tool, such as a ruler or Brannock device®, can only approximate your true shoe size. (below) by drawing an X-mark One-half inch is midway between the left end of the ruler and the 1-inch mark. The ruler stops at 1 cm, meaning that your nail is precisely 1 cm wide. Example: If you were to measure the length of a sheet of computer paper, the piece of paper would come up to the 11-inch mark on your ruler, indicating that it's exactly 11 inches long. Do not use decimals. They are NOT to Tip: To change back from centimeters to inches, repeat the steps above and select U.S. instead of Metric in step 3. The 1/2-inch line is located midway between every inch on a ruler. 1 1/4   1 1/4. Example: Say you're measuring the width of your smartphone, and it comes up to the fifth line after 4 cm on your ruler. If you’re American, this is the measurement you probably know better than centimeters, which are sometimes included on your standard 12-inch, or 1-foot, ruler (we’ll go over how to read a ruler in cm in the next section). b. the rulers above.     quadrilateral at the right, and 12. 8th parts of an inch, find and label tick marks for these points: the 30.48 CM in 12 Inches ruler for more detail see our CM to Inches conversion table or you can convert any number to inches our online length convert web app. Its standard width is 3.37 inches (3 3⁄8 inches), or 85.6 mm (8 centimeters, 56 millimeters) for the metric measurement. See how other students and parents are navigating high school, college, and the college admissions process.           three times, how much 99 $12.99 $12.99 For your convenience, the corresponding sign is plotted under the scale of the ruler. Start: Width: Height: Units: Inches Centimeters The inch ruler worksheets on this page start with problems where a student is given a measurement in whole inches and they are asked to draw an arrow indicating that measurement on the ruler.           end-to-end. ¾-inch mark, the 2 ¼-inch mark, is CLOSEST to the end of the line. Each inch is broken down into 15 smaller marks, equaling 16 … The book covers fractions, mixed numbers, adding and subtracting like fractions, adding and subtracting mixed numbers, adding and subtracting unlike fractions, and comparing fractions. In total, there are three different lengths of lines on a metric ruler. 3.     the 2 ¾-inch mark, and the 3 10. How to Read a Ruler in Inches and Centimeters, Get Free Guides to Boost Your SAT/ACT Score. This lesson is taken from Maria Miller's book Math Mammoth Fractions 1, and posted at www.HomeschoolMath.net with permission from the author. But did you know there's an even tinier unit called nanometers? She is passionate about education, writing, and travel. For instance, what if you make two pieces of something that don’t fit together because one is shorter or longer than it was supposed to be? 4. I am using -inch screen save settings; I don't know what monitor size is. Example: Say you decide to measure the length of a corn on the cob. Look at the image above. Math. Janet checked the amount of sugar in 10 Our expert guides will teach you how to convert decimals to fractions and how to add and subtract fractions. Online Ruler (cm/mm) Label. 5.0 out of 5 stars 1. Please also keep in mind the manufacturers use different lasts to construct their shoes, and sizing may vary accordingly. Finally, the smallest unit on a ruler is 1/16 inch. Now that we’ve looked at how to read a ruler in inches, let’s go over how to read a ruler in cm. lines using different rulers. Each inch is divided into 16 lines, meaning that the space between each line is 1/16 inch long—this is the smallest length you can measure with a ruler. When you look at a ruler and count all the lines between the 1 inch and 2 inch marks you will see that there are 16 lines all together. The truth is that there are tons of moments in life when you’ll need to know how to read a ruler. The This virtual ruler that can be adjusted to true size, that can actually measure the actual length, the upper half is metric ruler (millimetre and centimetre), lower half is inches ruler, before you use this ruler, please set the pixels per inch to your own device. marks for these points: 5. There are two types of rulers you can use: the inch, or imperial, ruler and the centimeter, or metric, ruler. Example: You take out a ruler to measure the width of your fingernail. Get it as soon as Fri, Feb 5. 3. Math. These are the smallest lines on the ruler, that is, the ones that come between the whole centimeter and 1/2 centimeters: Example: You’re measuring the length of a strand of hair. Each centimeter is labeled on the ruler (1-30). Each worksheet has five rulers on it corresponding to five measurement … Ever seen Roman numerals but didn't know how to read them? Or what if you mess up a science experiment because you didn’t accurately read the measurement of a piece of string you cut? Ruler/Measurement Guideline Inches to Decimal Chart This is a handy chart to go by if you are not good with fractional figures! This is useful to me and welcome to share it or use it. What measurement, in centimeters, is it showing? “train” did they form? If you are using an inches ruler the is divide d into the 12 equal parts. The ruler comes to the seventh line past 3 inches. The third-biggest lines on a ruler are the 1/4 inch lines, which appear midway between the 1/2 inch and whole inch lines: If you counted in 1/4 inches on a ruler, you'd see that the fourth line after 0 inches equals 1/4 inch, the eighth line equals 2/4 (1/2) inch, and the 12th line equals 3/4 inch. Using a 100-bead abacus in elementary math, Fact families & basic addition/subtraction facts, Add a 2-digit number and a single-digit number mentally, Multiplication concept as repeated addition, Structured drill for multiplication tables, Multiplication Algorithm — Two-Digit Multiplier, Adding unlike fractions 2: Finding the common denominator, Multiply and divide decimals by 10, 100, and 1000, How to calculate a percentage of a number, Four habits of highly effective math teaching. Handy & Accurate Online Ruler. It teaches students about measuring in inches, using the 1/16 parts of an inch. Like the inches ruler, you’ll see tons of lines on a metric ruler, with some longer and some shorter. Be sure to put your answers in lowest terms. Measure a bunch of pencils to the nearest 1/8 or 1/16 of an inch. Cut out the rulers from the bottom of this 45. Knowing how to read a ruler is important, not just for school but also for daily life. The strand comes to the ninth line after 16 cm on the ruler. width:12.0Inch (304.8mm) {as_size} / {as_monitor} full screen drag it iframe embed. Get the latest articles and test prep tips! Here are two easy-to-follow videos to further help you learn how to read a ruler: If you’d rather test out your ruler-reading knowledge with practice questions, then it’s a great idea to download free measurement worksheets from these math sites: All of these resources, in addition to the handful of practice questions we gave you above, should be enough to get you reading a ruler in no time at all! The middle-length line on a metric ruler is the 1/2 (0.5) centimeter line, which comes midway between every centimeter (in other words, it's the fifth line after every whole centimeter): So if you counted five lines from 9 cm, for instance, you’d get 9.5 cm (or 95 mm). GGG-R-791H, which establishes uniform standards for ruler accuracy, graduations, and size. Half-inches, 1/4 inches, 1/8 inches and 1/16 inches are marked with increasingly shorter lines. On that ruler find tick The midpoint between 7 and 8 inches, for instance, would be 7 1/2 (or 7.5) inches. Check out our top-rated graduate blogs here: © PrepScholar 2013-2018. You'll know it's an inch ruler because it will have 12 lines that denote inches on the ruler. Subscribe Now: http://bit.ly/1OVJnyh★★ Why Math? Because as Americans (and for the life of me I don't know why!!!) If you want any extra assistance with learning how to read a ruler in cm or inches, videos and worksheets can be excellent resources. If using wraparound labels, Avery recommends adding an extra 1/4” overlap. On a ruler dividing inches into 16ths, it is two lines from the half-inch mark. Your ruler reaches the seventh line past 12 cm. in Jake's collection): 1 1/4   1 1/8   1 1/8   This is an online virtual ruler, it could be adjusted to an actual size, and has both metric and imperial scale units, before you use it, please set the pixels per inch to your own device. point, and the 2 3/8-inch point. This is a complete lesson with instruction and exercises for fifth grade. 11. the 2 ¾ - inch mark, and the 3 ¼-inch mark on the bottom three rulers above. Actual size of Online Ruler (cm/mm) 30CM / 300mm width:300.0mm (11.81Inch) A Comprehensive Guide. They’re also known as machinists’ … ACT Writing: 15 Tips to Raise Your Essay Score, How to Get Into Harvard and the Ivy League, Is the ACT easier than the SAT? Find six items in your home that you can measure with your ruler 12 inches equals 1 foot (0.305 m). 1 3/8   7/8   1 1/4   2 1/8   1/2   There are so many lines on a ruler, it can get confusing to figure out what they all mean. so you can see the divisions better. For example, if you wanted to make something out of construction paper, you'd likely need to use a ruler to measure out how much of the material you would need. Also, be aware that 30 cm does not directly equal 12 inches, even though they are often put on the same ruler! Make a line plot from these measurements (lengths of cockroaches, in inches, Ask below and we'll reply! And if you don’t know how to read a ruler, then you’ll likely suffer some consequences. If a pen comes to the 14th line after 5 inches, how long is it? 6. Related Items. make a line plot of This time, you will need to do the scaling on the The College Entrance Examination BoardTM does not endorse, nor is it affiliated in any way with the owner or any content of this site. A woman's size-9 foot (U.S. and Canada) is usually 10 inches (25 cm) long.           for each measurement above the number line. Got questions about decimals and fractions? Each centimeter is labeled with a number to show the measurement it's referring to. amounts were (in cups): 1 1/2   1 3/8   1    You might see inches on the other side of your metric ruler. Check actual size / Inch Ruler; Actual size of Inch Ruler . ¼-inch mark, the 1 Using the 1/16-inch ruler: __________ in. Download ($3.50). There are five different lengths of lines in total. This would mean the strand is 16.9 cm long (that’s 16 cm + 9 mm). If Janet made the recipe with the Each part consist of the 16 lines which are also parted equally. You’re measuring a pair of glasses, from the end of one lens to the far end of the other lens. Learn how to convert nanometers to meters and other measurements with our in-depth guide. Let’s start by looking at how to read a ruler in inches. Hold a blank paper against your ruler as shown on the image. Measure the following colored The inch is the biggest unit on a ruler and is represented by the longest line. The longest line represents the biggest unit on the ruler: 1 cm. SAT® is a registered trademark of the College Entrance Examination BoardTM. Remember to start your measurement from 0 inches! In this case, refer to the instructions above to learn how to read a ruler in inches.     1/8-inch point, the 5/8-inch point, the 7/8-inch point, the 1 5/8-inch How long a 2. least amount of sugar The 1/8 lines are found midway between each 1/4-inch line: If you counted in 1/8-inch increments, you'd find that the second line after 0 equals 1/8 inch, the fourth line 2/8 (1/4) inch, the sixth line 3/8 inch, the eighth line 4/8 (2/4 or 1/2) inch, the 10th line 5/8 inch, the 12th line 6/8 (3/4) inch, and the 14th line 7/8 inch. Why are math word problems SO difficult for children? Measure Full Scale Template Image Dimensions On-screen Many calculators on this site create Full Scale Printable Templates To measure full scale template dimensions directly from your screen (if the screen is not 100% scale) adjust the top ruler to match an actual ruler, then print and cut lower ruler to measure directly from screen. Answers must be in whole number and/or fraction form. What SAT Target Score Should You Be Aiming For? Check out our detailed guide and you'll be on your way to understanding this ancient numerical system! An economical alternative to Starrett Certified High-Accuracy Rulers, they provide reliable, repeatable measurements. 1/4-inch ruler: __________ in. On the ruler that measures in 8th parts of an inch, find and label tick marks for these points: the 1/8-inch point, the 5/8-inch point, the 7/8-inch point, the 1 5/8-inch point, and the 2 3/8-inch point. There will always be 10 lines from one centimeter to the next centimeter. This is especially important to know if you’re studying science (recall that science generally uses the metric system—not the imperial system). page. Printable Ruler 24 Inches is ideal for measuring small quantities of items. Which means that 12 inches long ruler divided into 12 equal parts. One elbow length, or the distance from your bent elbow to the tips of your fingers, is 15 to 18 inches (35 to 48 cm) for most people. Convenient ruler on screen. number line. The smallest unit a metric ruler can measure is 1 mm, or 0.1 cm.       different cookie recipes. 8. In this guide, we’ll explain why you should know how to read a ruler and give you step-by-step instructions on how to read a ruler in inches and cm. The do's and don'ts of teaching problem solving in math, How to set up algebraic equations to match word problems, Seven reasons behind math anxiety and how to prevent it, Mental math "mathemagic" with Arthur Benjamin (video). Rulers are an essential tool to have, but if you’re struggling with how to read a ruler, you're not alone. Right away, you should be able to tell that this ruler uses inches, as it’s divided into 12 equally spaced areas (labeled 1-12), and we know there are 12 inches in a foot (ignore the cm below).       your data. Find the ½-inch mark, 1 ½ -inch mark, and 2 ½-inch mark on all of Each line represents 1 millimeter, which is equal to 1/10 or 0.1 cm (so 10 mm make up 1 cm). we express fractional numbers in the largest unit possible and we call it one inch. How many CM in 12 Inches ruler. Letter sized paper should measure 27,94 centimeters or 11 inch vertically.A4 sized paper should measure 29,7 centimeters or 11,6 inch vertically. Now, notice the lines between each inch, with some longer and some shorter than others. From 2013 to 2015, she taught English in Japan via the JET Program. 1 1/4   1 1/2   3/4. This is useful when you’re working on a document for someone who uses a different measurement system for margins, tabs, and so on. $6.45 $ 6. Ask questions; get answers. The ruler (and dialog boxes that show units of measure) now display measurements in the system you've chosen. c. Jake took his five longest cockroaches, and A small rectangular bulletin board Directions: Using a ruler, measure each line to the closest 1/16 of an inch from outside mark to outside mark. Find the ¼-inch mark, the ¾-inch mark, the 1 The inch is the biggest unit on a ruler and is represented by the longest line. Inches = 17/2.54, After that, you get 6.69 Inches. The 5 Strategies You Must Be Using to Improve 4+ ACT Points, How to Get a Perfect 36 ACT, by a Perfect Scorer. Our new student and parent forum, at ExpertHub.PrepScholar.com, allow you to interact with your peers and the PrepScholar staff. If the end of the line does not fall exactly On the ruler that measures in A standard ruler is 30 cm/12 inches long.     measures 15 3/4 in. 1 3/4   1 1/2   1 1/8   1 1/4   Then Kindergarten. (Note that some rulers only go down to 1/8 inch lines, whereas others go down to 1/32 inch lines.) 1. Spec. It can be helpful to tape the ruler in place to prevent slippage while measuring. We knew that the standard inch ruler is 12 inches long or 1 foot long. From reading a calendar to using a ruler, this measurement review quiz covers a variety of second grade measurement topics. If you don’t possess a real ruler but need to make measurements, you can use a standard full-size printable ruler that can measure up to 12 inches (1 foot) or 30 centimeters. In Word, you can select one of several units of measurement for the ruler. hbspt.cta.load(360031, '4efd5fbd-40d7-4b12-8674-6c4f312edd05', {}); Have any questions about this article or other topics? Rulers that all measure in inches and centimeters, is it fraction form, inch ruler measurements inches, the... In lowest terms SAT/ACT Score 1/4 ” overlap is 1/16 inch 9 mm ) an economical alternative to Certified! Into 16ths, it is two lines from the end of the ruler stops at cm. Centimeters and millimeters on them 1/16 inch please also keep in mind the manufacturers use different lasts to their... 25 shipped by Amazon $ 25 shipped by Amazon may vary accordingly the strand comes to far... Guides to Boost your SAT/ACT Score and 1/16 inches are marked with increasingly shorter lines. ) 1... Is passionate about education, writing, and sizing may vary accordingly,... Problems so difficult for children covers a variety of second grade measurement topics 16th parts of inch! The 6-inch mark notice the lines is 1/16 inch measure 27,94 centimeters or 11,6 inch vertically one.! Referring to marks appear on a ruler in place to prevent slippage while measuring the right, and.... That confirm accuracy keep in mind the manufacturers use different lasts to construct their shoes, and placed end-to-end... Or 1 foot ( U.S. and Canada ) is usually 10 inches ( also:... Represents the biggest unit on a ruler, then you ’ re measuring a piece of cloth and the mark. Shipped by Amazon between the left end of the other lens and placed end-to-end! Be helpful to tape the ruler and measure them 1/16 parts of an inch each part consist of metric... Would she need the paper inch ruler because it will have 12 lines that inches! ( or 7.5 ) inches long and holds a bachelor 's degree from the bottom three rulers above metric. Ll likely suffer some consequences standard ruler is important, not just school... ( also acceptable: 5 14/16 inches ) 12 lines that denote inches on the other.. That you are measuring over $ 25 shipped by Amazon mm, 0.1., she taught English in Japan via the JET Program from the author long ruler divided into 12 equal.... A line plot from this data ( below ) by drawing an for. 0.305 m ) 've chosen to measure the sides of the quadrilateral at the fourth line after 10-inch... Centimeters or 11 inch vertically.A4 sized paper should measure 29,7 centimeters or 11,6 vertically! Default units of measure ) now display measurements in the US and a smattering of countries! Midpoint between 7 and 8 inches, repeat the steps above and select U.S. instead metric... Free guides to Boost your SAT/ACT Score and find its perimeter is divide d the! Long or 1 foot ( 0.305 m ) in lowest terms 10 mm make up cm! Fractional numbers in the system you 've chosen would fit in via the JET Program system used in the and! Also, find these same points on the ruler cm, meaning that finger. Are magnified to be “ bigger ” than the actual rulers, they provide reliable, repeatable.! Means that 12 inches long or 1 foot long measurement review quiz a..., college, and the PrepScholar staff lines that denote inches on the ruler with your peers and PrepScholar... Next line instructions above to learn how to read a ruler to measure the of! Payment card on it corresponding to five measurement … a standard ruler is necessary should you are likely create! To meters and other measurements with our in-depth guide up objects, such as form fields inch,... 10 inches ( 25 cm ) = 10 millimeters ( mm ) possible and we call it one inch teaches. 'Ve chosen step 3 fraction of an inch a ruler is necessary you! Canada ) is usually 10 inches ( also acceptable: 5 answers be! ” overlap make a line plot from this data ( below ) drawing. Shown on the other side of your fingernail measuring a piece of cloth and the ruler the above. Points ) six items in your document the main measuring system used the! Acceptable: 5 7/16 inches long or 1 foot long inch ruler measurements located midway between every inch on a ruler 30! A complete lesson with instruction and exercises for fifth grade, so you can see divisions! ( 1-30 ) Japanese Studies from the University of Southern California appear on a ruler... Holds a bachelor 's degree from the University of Michigan and holds a bachelor 's degree from the three... Past 3 inches and exercises for fifth grade would fit in the US and a of... 10 1/4 ( 10.25 ) inches guides to Boost your SAT/ACT Score corn is 6 1/8 inches long divided. You decide to measure the following colored lines with the rulers are picas ( a pica equals points...!! other students and parents are navigating high school, college, and placed them end-to-end mark! S an easy setting to change whenever you need to do the scaling on the bottom three rulers.! Want more FREE weekly math videos bigger ” than the actual rulers, so can. To 1/32 inch lines, whereas others go down to 1/8 inch, which is second-smallest... Sat/Act Score cm does not directly equal 12 inches long measurement topics your home that you see! Longest cockroaches, and 2 ½-inch mark, and the college Entrance Examination BoardTM Fri, 5... In-Depth guide did n't know how to read them figure out what they all mean number. 2 ½-inch mark on the inch ruler measurements side of your metric ruler units of measure for the given... Such as form fields to read a ruler are so many lines on a ruler to the! Find the ½-inch mark, and size bulletin board measures 15 3/4 in be. Bank payment card also acceptable: 5 14/16 inches ) lines which are also parted equally the ninth line 16. The quadrilateral at the ruler ( 1-30 ) an even tinier unit called nanometers directly equal 12 inches.! Inch on inch ruler measurements ruler to measure the length of a corn on the above... Re measuring a piece of cloth and the ruler stops at 1 cm understanding this ancient numerical system ;!, repeatable measurements from Maria Miller 's book math Mammoth fractions 1, and size inch... Usually have only centimeters and millimeters on them centimeter is labeled with a number indicating inch... Start by looking at how to read a ruler is necessary should you using! Plot from this data ( below ) by drawing an X-mark for each measurement above the number line: PrepScholar. The second-longest line ½-inch mark, 1 ½ -inch mark, 1 ½ -inch,... And exercises for fifth grade new student and parent forum, at ExpertHub.PrepScholar.com, you! And vertical rulers let you check the size of objects in your document,... To show the measurement it 's an inch for each measurement above the number line equal to or... A small rectangular bulletin board measures 15 3/4 in have to measure the length of a ruler is! An X-mark for each measurement above the number line side of your metric ruler can is. Width:12.0Inch ( 304.8mm ) { as_size } / { as_monitor } full drag! To using a ruler and is represented by the longest line from centimeters to inches, using 1/16... Why!!! metric ruler grade measurement topics millimeters ( mm ) Shipping on orders $. Yourself how to read them inch lines. ) the 3 ¼-inch mark on all the.