Sixteenth
Feet and Inches Calculator
Type measurements the way you read a tape, like 12' 3-5/8" + 4' 7-1/4". You get the answer in feet, inches and fractions, and in decimal feet and metric.
Use ' for feet and " for inches, or ft and in. A number right after feet is inches (5' 6). Fractions: 3-5/8 or 3 5/8.
How to work with feet, inches and fractions
Tape measurements mix three units: feet, whole inches and fractions of an inch. To add them by hand you add each part, carry every 16 sixteenths into an inch and every 12 inches into a foot. The calculator does the same thing in exact inches, then rounds the answer to the fraction you pick. A ≈ sign means the answer was rounded.
- Add or subtract lengths: 12' 3-5/8" + 4' 7-1/4" = 16' 10-7/8".
- Divide by a number to split a length into equal parts, for example to space balusters.
- Divide by a length to count how many fit: 10' ÷ 16" = 7.5.
- Multiply two lengths for square feet, and three for cubic feet and cubic yards.
Fractions of an inch in decimals
| 1/16 | 1/8 | 3/16 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 |
|---|---|---|---|---|---|---|---|
| .0625 | .125 | .1875 | .25 | .3125 | .375 | .4375 | .5 |
| 9/16 | 5/8 | 11/16 | 3/4 | 13/16 | 7/8 | 15/16 | 1 |
| .5625 | .625 | .6875 | .75 | .8125 | .875 | .9375 | 1 |
Questions
How do you add feet and inches?
Add the inches and the feet separately, then carry every 12" into a foot. 12' 3-5/8" + 4' 7-1/4" is 16' and 10-7/8". This calculator does the carrying and the fractions for you.
How do I divide a length into equal parts?
Divide the length by a number. 10' 7" ÷ 3 is about 3' 6-5/16". Divide by another length to count how many fit: 10' ÷ 16" = 7.5.
How do I convert inches to decimal feet?
Divide the inches by 12. 7-1/2" is 0.625'. Type any measurement and the answer is shown in decimal feet too.
Can I get square feet?
Yes. Multiply two lengths, like 12' 6" × 10' 3", and the answer is shown in square feet. Multiply by a third length for cubic feet and cubic yards.