Seldons
feet to inches
1 foot = 12 inches.
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How do you convert feet to inches?
Use this formula. It is exact — these units are defined by international agreement, not measured.
in = ft × 12
Example: 10 ft × 12 = 120 in.
feet to inches conversion table
Common values, rounded to six significant figures.
| ft | in |
|---|---|
| 1 ft | 12 in |
| 2 ft | 24 in |
| 3 ft | 36 in |
| 4 ft | 48 in |
| 5 ft | 60 in |
| 6 ft | 72 in |
| 8 ft | 96 in |
| 10 ft | 120 in |
| 12 ft | 144 in |
| 15 ft | 180 in |
| 20 ft | 240 in |
| 25 ft | 300 in |
| 30 ft | 360 in |
| 50 ft | 600 in |
| 75 ft | 900 in |
| 100 ft | 1,200 in |
| 200 ft | 2,400 in |
Twelve inches to the foot is exact and predates the metric system, which is why US construction, lumber and human height are all quoted as feet plus inches rather than decimal feet. The trap is decimal notation: 5.5 feet is 5 feet 6 inches, not 5 feet 5 inches, because the fraction is of twelve and not of ten.
Values worth remembering
These come up often enough that knowing them saves a lookup.
- 6 ft = 72 ina tall adult
- 100 ft = 1,200 ina competition pool
- 3 ft = 36 inone yard
Questions people ask
How many inches is 1 foot?
1 foot is 12 inches.
How many feet is 1 inch?
1 inch is 0.0833333 feet.
How do you convert feet to inches in your head?
Use × 12. That lands within a percent or so of the exact figure, which is close enough for packing, shipping estimates and shopping — use the calculator when the number has to be right.
Is the foot to inch conversion exact?
Yes. The relationship is exact by international agreement, so 12 is a definition rather than a measurement. Rounding in the answer comes from display, not from the conversion.