To convert feet to inches, multiply by 12. 5 feet is 60 inches, 6 feet is 72 inches, and 5.5 feet is 66 inches.
This is the conversion people do most for heights ("I'm 5'8", so how many inches is that?") and for cutting materials, where tape measures read in inches but plans give feet.
How to use the feet to inches converter
- Type the value in feet into the box. Decimals are fine.
- The result in inches updates as you type, along with the working.
- Need the other way? Switch the direction menu, or open the inches to feet converter.
Formula
There are exactly 12 inches in a foot by definition, in both the US customary and British imperial systems.
Worked example
How many inches tall is someone who is 5 ft 8 in?
- 5 ft × 12 = 60 in.
- Add the extra 8 in: 60 + 8 = 68.
- Result: 68 inches.
With decimal feet, like 5.75 ft from a spreadsheet: 5.75 × 12 = 69 in, which is 5 ft 9 in.
Feet to inches chart
Common values, rounded to 2 decimal places.
| Feet (ft) | Inches (in) |
|---|---|
| 0.25 ft | 3 in |
| 0.5 ft | 6 in |
| 0.75 ft | 9 in |
| 1 ft | 12 in |
| 1.5 ft | 18 in |
| 2 ft | 24 in |
| 3 ft | 36 in |
| 4 ft | 48 in |
| 5 ft | 60 in |
| 5.5 ft | 66 in |
| 6 ft | 72 in |
| 6.5 ft | 78 in |
| 7 ft | 84 in |
| 8 ft | 96 in |
| 10 ft | 120 in |
| 12 ft | 144 in |
Decimal feet vs feet and inches
Surveyors, engineers and spreadsheets often write lengths as decimal feet (7.25 ft), while carpenters use feet and inches (7′3″). They are not the same digits: 0.1 ft is 1.2 in, not 1 in. Common decimals: 0.25 ft = 3 in, 0.5 ft = 6 in, 0.75 ft = 9 in.
Lumber example: an 8-foot board is 96 inches, but "precut" wall studs for 8-foot ceilings are 92⅝ in so the finished wall comes out right.
Quick mental math
Multiply by 10, then add twice the number. 7 ft: 70 + 14 = 84 in.
Related conversions
Going the other way: inches to feet converter. Related pages: inches to cm converter, cm to inches converter, feet to meters converter. For other units in the same family, use the full length converter.
Caveats and assumptions
- Results show up to 10 significant digits; the chart is rounded for reading. Keep full precision for engineering, medical or legal work.
Frequently asked questions
How many inches are in a foot?
Exactly 12 inches.
How many inches is 6 feet?
72 inches.
What is 5′4″ in inches?
5 × 12 + 4 = 64 inches.
How many inches is 0.1 foot?
1.2 inches. Decimal feet are tenths of a foot, not inches.
Sources
- NIST — SI Units: Length (1959 definition of the inch) — 1 in = 25.4 mm exactly
- NIST Handbook 44 — Appendix C, General Tables of Units of Measurement — US customary length table (12 in = 1 ft, 3 ft = 1 yd)
This calculator gives estimates for planning and education. Check measurements, local codes, supplier specs and your school's official policy before relying on a result. See our disclaimer and how we build and check calculators.