Feet and Inches Calculator
Add or subtract two lengths when one is in feet and the other in inches. Type each one as it appears on the tape, and the total shows in inches and in decimal feet.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Each length is turned into one common measure first, so feet and inches mix without any hand conversion. The second length is then added to the first, or taken away from it.
One foot is twelve inches. The total is shown in inches, which suits cuts, and in decimal feet, which suits material lists.
Worked example
Starting from 5 ft and then adding or subtracting 3.5 in, the total is 63.5 in, or 5.292 ft in decimal feet.
Questions
Can I type a fraction like 3 1/2 inches?
Type it as a decimal instead. Three and a half inches is 3.5, and a quarter inch is 0.25.
Why does the total show as a decimal?
Decimals are easy to add and subtract. To turn them back into feet and inches, divide the inches by twelve for feet and keep the remainder as inches.
Can I add more than two lengths?
This version handles two at a time. Run it again, using the total as the first length.
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