FreeFeet and Inches Calculator
Type lengths the way a tape measure reads them, 5' 6 3/8" or 66 3/8, then add them up, take one from another or divide a board into equal parts. The answer comes in feet, inches and fractions to the nearest 1/16 in (or 1/8 to 1/64), in decimal feet and in millimetres.
Add and subtract lengths
Type 5' 6 3/8", 66 3/8, 7.5' or 1680 mm.
- Feet and inches
- 7' 3 5/8"
- Inches
- 87 5/8"
- Decimal inches
- 87.625
- Decimal feet
- 7.3021
- Millimetres
- 2225.7
Multiply or divide a length
8' split into 5 equal parts:
- Feet and inches
- 1' 7 3/16"
- Inches
- 19 3/16"
- Decimal inches
- 19.2
- Decimal feet
- 1.6
- Millimetres
- 487.7
- Type each length: 5' 6 3/8", 66 3/8, 7.5' or even 1680 mm.
- Choose + or − for each line, and add as many lines as you need.
- Pick the rounding, 1/8 to 1/64 in, and read the total in every unit.
Decimal feet to inches chart
| Decimal feet | Inches | Nearest 1/16" |
|---|---|---|
| 0.05 ft | 0.60" | 5/8" |
| 0.10 ft | 1.20" | 1 3/16" |
| 0.15 ft | 1.80" | 1 13/16" |
| 0.20 ft | 2.40" | 2 3/8" |
| 0.25 ft | 3.00" | 3" |
| 0.30 ft | 3.60" | 3 5/8" |
| 0.35 ft | 4.20" | 4 3/16" |
| 0.40 ft | 4.80" | 4 13/16" |
| 0.45 ft | 5.40" | 5 3/8" |
| 0.50 ft | 6.00" | 6" |
| 0.55 ft | 6.60" | 6 5/8" |
| 0.60 ft | 7.20" | 7 3/16" |
| 0.65 ft | 7.80" | 7 13/16" |
| 0.70 ft | 8.40" | 8 3/8" |
| 0.75 ft | 9.00" | 9" |
| 0.80 ft | 9.60" | 9 5/8" |
| 0.85 ft | 10.20" | 10 3/16" |
| 0.90 ft | 10.80" | 10 13/16" |
| 0.95 ft | 11.40" | 11 3/8" |
| 1.00 ft | 12.00" | 1' |
Inches to decimal feet
| Inches | Decimal feet | Inches | Decimal feet |
|---|---|---|---|
| 1" | 0.0833 ft | 7" | 0.5833 ft |
| 2" | 0.1667 ft | 8" | 0.6667 ft |
| 3" | 0.2500 ft | 9" | 0.7500 ft |
| 4" | 0.3333 ft | 10" | 0.8333 ft |
| 5" | 0.4167 ft | 11" | 0.9167 ft |
| 6" | 0.5000 ft | 12" | 1.0000 ft |
How to add feet and inches
Add feet to feet and inches to inches, then turn every 12 inches into a foot. Fractions need the same bottom number first: 3/8 + 1/2 is 3/8 + 4/8 = 7/8. So 5' 6 3/8" + 2' 4 1/2" = 7' 10 7/8".
To subtract, borrow a foot as 12 inches when the inches are short: 7' 2" − 3' 8" becomes 6' 14" − 3' 8" = 3' 6". Fractions borrow the same way: 4 1/8" − 2 3/4" is 3 9/8" − 2 6/8" = 1 3/8".
Dividing a length into equal parts
Divide the length in inches and round to the nearest 1/16: an 8 ft board in five equal pieces is 96 ÷ 5 = 19.2 in, about 19 3/16 in. Every saw cut removes about 1/8 in, so for five pieces from one board take four kerfs off first: (96 − 4 × 1/8) ÷ 5 = 19.1 in, about 19 1/8 in.
For equal shelf spacing inside a cabinet, subtract the shelf thicknesses before you divide. Our furniture plans and the cut list optimizer do this for you.
Decimal feet and inches
Plans and laser measures often give decimal feet. The whole number is the feet; multiply the decimal part by 12 for the inches: 5.75 ft is 5 ft and 0.75 × 12 = 9 in, so 5' 9". 0.1 ft is 1.2 in, about 1 3/16 in, not 1 in. The chart below converts every 0.05 ft.
Start from a furniture plan instead
All plans →Do not want to work out every part? Pick a design, type its size and get the cut list.
Frequently asked questions
How do you add feet and inches together?
Add the feet and the inches separately, then carry every 12 in as a foot: 5' 8" + 3' 7" = 8' 15" = 9' 3".
How many inches is 7.5 feet?
90 in: 7.5 × 12 = 90, or 7' 6".
How do you convert decimal feet to feet and inches?
Keep the whole number as feet and multiply the decimal part by 12: 5.75 ft = 5' 9". For a fraction, multiply the leftover decimal inches by 16.
What is 1/16 of an inch as a decimal?
0.0625 in, or 1.59 mm. 1/8 in is 0.125, 1/32 in is 0.03125.
Learn more
What Is a Cut List and How to Make OneA cut list is the list of every part to cut, with sizes, quantities, material, grain and edges. Learn how to make a cut list for furniture and turn it into a layout.How to Read a Tape MeasureHow to read a tape measure in inches and fractions, step by step: the inch, half, quarter, eighth and sixteenth marks, feet and stud marks, and metric cm and mm.