Fraction to Tape Measure Converter

Turn a decimal measurement into the nearest fraction on a real tape measure.

Round to nearest

Decimal inches

Enter your decimal measurement in inches

Which precision should I use?

Most tape measures go to 1/16". Use 1/8" for rough framing, 1/16" for general DIY, and 1/32" for finish work like trim or cabinetry.

Calculators give you decimals. Tape measures give you sixteenths. This converts between them, so you can actually cut the number you just worked out.

How it works

The decimal is converted to the nearest usable fraction on a real tape measure — sixteenths of an inch — and reduced to its simplest form, so 0.375 comes back as 3/8 rather than 6/16. Feet and inches are separated out, because that is how you actually read a tape.

Example

11.4375 inches is 11 7/16 on a tape. 2.375 feet is 2 feet 4 1/2 inches.

Tips & common mistakes

Sixteenths are as fine as most tapes go, and finer than most saws can honor. Chasing a thirty-second of an inch on a construction project is wasted effort.
Mark with a V, not a line. The point of the V is an exact spot; a pencil line is a sixteenth of an inch wide all by itself.
The hook on the end of a tape measure is deliberately loose. It slides by exactly its own thickness so it reads correctly whether you push it against something or hook it over an edge — it is not broken.
Use the same tape for the whole project. Different tapes genuinely disagree by a small amount, and mixing them is a mystery you do not want to debug.

Frequently asked questions

What is 0.375 inches on a tape measure?

3/8 of an inch. Each sixteenth is 0.0625, so 0.375 is six sixteenths, which reduces to 3/8.

How do I convert decimal inches to fractions?

Multiply the decimal part by 16 to get the number of sixteenths, round to the nearest whole number, then reduce the fraction. 0.4375 × 16 = 7, giving 7/16.

Why is the end of my tape measure loose?

It is meant to be. The hook moves by exactly its own thickness so that inside and outside measurements both read true. A tight hook is the broken one.