Built for tape-measure math
Add and subtract feet, inches and common fractions without converting everything to decimals first.
Free contractor tool
Carpenter Fraction Calculator
Do tape-measure math without translating every fraction into a decimal first. Add, subtract, multiply or divide feet, inches and construction fractions.
Feet + inchesTape fractions1/8″ to 1/64″ rounding
Construction math
Enter measurements the way they appear on a tape. Fractions, mixed numbers, feet and inches all work.
Multiply or divide
When using × or ÷, the second entry becomes a plain number. That makes halving a run or dividing a wall into equal bays quick.
Choose your precision
Round the displayed result to the fraction your work calls for, from 1/8″ through 1/64″.