How to Read a Tape Measure

A tape measure, also called a measuring tape, is a roll of metal (sometimes cloth) tape with evenly graduated markings used for measuring the length of objects or spaces. The tape is often yellow and rolled in a plastic case.

Tape measures are commonly used in construction, architecture, building, home projects, crafts, and woodworking. They usually come in lengths from 6 feet to 35 feet long.

Tape measures may have measurements in imperial and metric, imperial-only, or metric-only.

How to Read an Imperial Tape Measure

On an imperial tape measure, the markings represent lengths in inches and fractions of an inch.

The largest ticks each represent one inch (1″) increments, and the smaller ticks between them represent the following fractions: ¹⁄₁₆“, ¹⁄₈“, ³⁄₁₆“, ¹⁄₄“, ⁵⁄₁₆“, ³⁄₈“, ⁷⁄₁₆“, ¹⁄₂“, ⁹⁄₁₆“, ⁵⁄₈“, ¹¹⁄₁₆“, ³⁄₄“, ¹³⁄₁₆“, ⁷⁄₈“, and ¹⁵⁄₁₆“. Therefore, the large ticks denote inches, and the smaller ticks denote fractions of an inch.

To read a tape measure, find the number next to the large tick, and then find how many small ticks past it the measurement is. Add the number next to the large tick with the fractional tick to get the measurement. For instance, if the length of an object measures five small ticks past the number 4 tick, then the measurement is 4 ⁵⁄₁₆“.

Reading a tape measure is the same as reading a ruler.

What Do All the Markings Mean?

To read a measuring tape, you need to understand what all the markings mean. The large ticks are spaced 1″ apart, and the small ticks are all spaced fractions of an inch apart. The numbers next to the large ticks indicate the number of inches from the end of the tape measure.

The second largest ticks halfway between the inch markings are the half-inch markings. There is ¹⁄₂” between each inch marking and half-inch marking.

The next largest ticks that are halfway between the inch markings and half-inch markings are the quarter-inch markings. There is ¹⁄₄” between the one-inch marking and the quarter-inch marking, as well as between each quarter-inch marking and the subsequent half-inch marking.

The second smallest ticks are the eighth-inch markings, and there is ¹⁄₈” between each eighth-inch marking and the adjacent quarter-inch, half-inch, and one-inch markings.

The smallest ticks on a tape measure are the sixteenth-inch markings. There is ¹⁄₁₆” between each adjacent marking on the tape measure.

Inch Fractions for Each Mark

See the table below for the decimal equivalents of all the fractions on a tape measure. You might also like our inch fraction calculator for converting between decimal and inch fractions as well as getting decimal equivalents for fractions.

Inch Fraction, Decimal, and Millimeter Equivalents

How to Read a Metric Tape Measure

Metric tape measures have similar markings to imperial models, but the markings represent centimeters and millimeters instead of inches and fractions of an inch. The larger markings on a metric tape that are labeled with numbers are the centimeters, and the smaller marks are millimeters.

Because there are 10 millimeters in a centimeter, there are 9 millimeter tick marks between each centimeter on the tape.

On a metric tape measure, there is 1 cm between each large numbered tick mark, and there is 1 mm between each smaller, non-numbered tick.

How to Use a Tape Measure

Get the most out of your measuring tape with the following tips for using it.

How to Use the Tape Lock

Almost all tape measures have a lock that will hold the tape measure in place and prevent it from recoiling. This is useful if you need to take tension off of the tape measure or if you need to set the tape measure aside while it is extended.

On this Stanley FatMax model, the slide lock is the large black button on the top. Sliding this down will lock the tape in place to prevent recoil.

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How to Use the Sliding Hook

A signature feature of a tape measure is the hook on the end of the tape. This serves a dual purpose to:

1. prevent the tape from rolling into the case
2. allow the tape to be hooked onto the end of items for convenient measuring

You might notice that the end hook slides or moves just a bit. This is by design to account for the thickness of the hook, so when hooking to an object to be measured, the hook slides outward so that the end of the tape can sit flush with the end of the object.

When butting up against a surface instead, the hook slides slightly inward, so, once again, the end of the tape can sit flush with the surface. Both setups allow for better accuracy when performing various measurements.

Be mindful of tape measures that do not have a sliding hook, as they will not be as accurate.

How to Use the Framing Stud Hints

Most tape measures have red markings at certain intervals: 16″, 32″, 48″, 64″, and so on. These numbers are significant in that they indicate the placement of studs, which are usually spaced at 16 inches on center intervals, a property useful for framing.

Some tape measures also feature a black diamond symbol at intervals that are 19.2″ apart. These diamonds are also used to indicate joist spacing or framing intervals for a wider stud.

How to Use the Nail Grab

The hook on a tape measure often has a small hole or groove in it. This is actually used to allow attaching the hook on a nail or screw so it doesn’t slide off when making longer measurements.

This is especially useful for longer measurements, such as measuring across the length of a room or patio.

On the hook in the image above, the oval cutout is used to hook onto a nail or screw.

Use the Sides of the Hook

Some tape measures, especially framing tapes, have large hooks that can be used to grip surfaces on the side of the hook. Using these can improve the hook’s gripping ability, attach to a wider range of surfaces or edges, and improve the accuracy of measurements since the tape measure will not need to be twisted to read the markings.

How to Choose the Right Tape Measure

There are many tape measures on the market, and many serve very different purposes. When choosing the one that’s right for you, consider what you’ll be using it for, how long you need it to be, and how much you’d prefer to spend.

When choosing a tape measure, consider the following features to find a tape measure that’s right for you and your needs.

• Size and ease of reading the markings
• Imperial or metric markings
• Length of the tape
• Physical size of the tape and housing
• Standout length for measuring longer lengths
• Locking features
• Durability
• Price

See our review of the best tape measures to find which tape measure we found to be the best and for reviews on several leading tape measures on the market. In a pinch, you can even print a tape measure to save a trip to the store.

Frequently Asked Questions

Is a tape measure in centimeters or inches?

How do you read a tape measure in inches and feet?

What can you use as a tape measure if you don’t have one?

Can you use your phone as a tape measure?

How accurate is a tape measure?