How to Read a Tape Measure in Inches and Feet

What the marks on a tape measure mean

A standard US tape measure is a long ruler with one big idea: every inch is split into equal parts. The numbered lines are whole inches. Between each pair of numbers sit smaller lines that divide that inch into halves, quarters, eighths and often sixteenths.

The trick is that line length tells you the fraction. The longer the line, the bigger the piece of an inch. Once you learn that pattern, you can read almost any tape without counting every tick.

The fraction marks, from longest line to shortest

Start in the middle of any inch. The longest of the small lines is the half-inch mark. Halfway between a whole-inch line and the half-inch line is the quarter mark, and so on. Each time you go to a shorter line, the fraction gets smaller.

Most home tapes mark down to 1/16 inch. Some list finer detail. For example, the WORKPRO 25 ft tape in our lineup lists a minimum accuracy of 1/32 inch, and it prints clear marks every 1/8 inch. The Klein Tools 9225 also lists bold lines every 1/8 inch. Check your own blade to see how fine it goes.

How to read a measurement step by step

Hook the end of the tape on the edge of what you are measuring and pull the blade straight and flat. Then follow these steps.

• Find the last whole-inch number that sits before your end point. That is your inches.
• Look at the small lines between that number and the end point.
• Work out which line your end point lands on, using line length to name the fraction.
• If the end point lands between two lines, round to the closest line, or note the next smaller fraction if you need to be careful.
• Write it as inches plus a fraction, such as 7 3/8 inches.

Counting sixteenths without getting lost

If your end point falls on a short line, count from the nearest longer line. Say you pass the 3 inch mark and land on the third small line after the half-inch line. Each of those small steps is 1/16, so you are at 3 and 1/2 plus 3/16, which is 3 11/16 inches.

Another way is to count all the small lines from the whole inch. Every inch has sixteen spaces, so landing on the eleventh line means 11/16. Reduce the fraction when you can. Four 16ths is 1/4, and eight 16ths is 1/2.

Some tapes print the fractions right on the blade to save you the counting. The Craftsman 25 ft Compact Easy Grip lists fractions printed in alternating colors and heights, and the Craftsman 25 ft Self-Lock also lists fractions printed on the blade. If you are a beginner, that kind of printing can speed things up.

Reading feet and inches together

Twelve inches equal one foot. Many tapes print the foot count in a different color or with an F, and some mark each foot with a longer or boxed number. The WORKPRO listing, for instance, notes marks at each 1 foot and 1.5 foot point. Past 12 inches, most tapes show both numbers: 12 for the first foot, 24 for the second, and so on.

To change a total in inches into feet and inches, divide by 12. The whole number is feet, and the remainder is inches. Here are two examples.

• 67 3/8 inches: 12 goes into 67 five times (60), leaving 7. That is 5 feet 7 3/8 inches.
• 38 3/4 inches: 12 goes into 38 three times (36), leaving 2. That is 3 feet 2 3/4 inches.
• To go the other way, multiply feet by 12 and add the extra inches. 4 feet 5 inches is 48 plus 5, or 53 inches.

Special marks and tape features that help

You may see marks that look odd at first. Many tapes have stud markings at 16-inch spacing, since wall studs are often framed that way. The Stanley FatMax 2-pack lists both 16-inch and 19.2-inch stud center markings. These are layout marks, not part of a normal reading, so do not confuse them with a fraction.

Blade width and printing also affect how easily you read. In our data, the Stanley FatMax 33-725 has a 1.25 inch blade, the widest listed, and the listing says that width makes it easier to read. Dual-scale tapes, like the Amazon Basics 16 ft model, carry inch and metric markings, so check which edge you are reading before you write a number down.

If you are shopping for your first tape, our best measuring tape page lines up blade length, width, standout and other specs side by side. Standout matters here too, because a blade that bends in the air makes it hard to read accurately when you measure alone. You can also see how each model handles a lock and a hook on the measuring tape comparison.

Common mistakes and safety notes

Most reading errors come from small habits, not from math. Watch for these:

• Reading from the wrong edge, such as the metric side.
• Miscounting sixteenths. Count from a longer line, not from the case.
• Bending or sagging the blade over a long span.
• Leaving out the foot count after you pass 12 inches.
• Forgetting to measure twice before cutting.

Stay safe while you measure

A steel blade can cut skin, and it snaps back fast when it retracts. Keep your fingers off the edge and guide the blade home with your hand instead of letting it whip. Wear safety glasses if the blade could fly back toward your face.

Metal tapes conduct electricity. Do not stretch one near live wires, open panels or outlets. When you measure up high, set your ladder properly and keep your balance, rather than reaching with the tape.

Frequently asked questions

Why does the hook at the end of the tape move?

The hook slides a little on purpose. It slides in for inside measurements and out for outside ones, so the reading stays right either way.

How do I measure the inside of a space?

Press the case against one side and read the blade at the other. Then add the case length, which is usually printed on the case.

What does the metric side of a dual-scale tape show?

It shows centimeters and millimeters. Do not mix the two scales in one measurement, or your number will be wrong.

Do I need a longer tape to read feet?

Not to read them. Any tape shows feet, but a longer blade lets you measure a longer span in one pull.