Inch Fraction Calculator
Add or subtract measurements in feet, inches and fractions, or multiply and divide them, and get the answer the way a tape measure reads it, to the nearest 1/16 inch.
How to type measurements
| You type | Read as |
|---|---|
| 5' 3 3/8" | 5 feet 3⅜ inches |
| 5ft 3in, 5-3 | 5 feet 3 inches |
| 63 3/8 | 63⅜ inches |
| 63.375 | 63.375 inches |
| 11/16 | 11/16 inch |
| 7' | 7 feet |
A number on its own is read as inches. Use ' or ft for feet and " or in for inches.
Common fractions in decimals
| Fraction | Decimal (in) | mm |
|---|---|---|
| 1/16 | 0.0625 | 1.59 |
| 1/8 | 0.125 | 3.18 |
| 1/4 | 0.25 | 6.35 |
| 3/8 | 0.375 | 9.53 |
| 1/2 | 0.5 | 12.7 |
| 5/8 | 0.625 | 15.88 |
| 3/4 | 0.75 | 19.05 |
| 7/8 | 0.875 | 22.23 |
The full 1/64 table is in the fraction to decimal inch chart. To see where a fraction falls on a tape, open the online tape measure, or practice with the ruler reading quiz.
Frequently asked questions
How do I add inch fractions?
Turn the fractions into the same bottom number, add the tops, then carry whole inches. 3/8 + 11/16 = 6/16 + 11/16 = 17/16 = 1 1/16 inch. With feet, add the inches first and carry every 12 inches to the feet.
How do I subtract feet and inches?
Subtract the inches first; if the top number is smaller, borrow 12 inches from the feet. 6' 2 1/4" − 2' 7 1/2" = 5' 14 1/4" − 2' 7 1/2" = 3' 6 3/4".
How do I divide a board into equal parts?
Divide the length by the number of parts. A 47 3/8 inch shelf split into 3 equal spaces is 15 19/24 in, about 15 13/16 inch each. Use the ÷ option above and choose a number, not a length, for the second value.
What does nearest 1/16 mean?
Most US tape measures mark sixteenths of an inch, so answers are rounded to the closest 1/16 (0.0625 in, about 1.6 mm). Choose 1/32 or 1/64 for machining and woodworking that needs more precision.