Feet to Inches Converter
Convert feet to inches instantly. Free online feet to inches calculator with common values and conversion formula.
Formula
inches = feet × 12
Common Conversions
How to Convert Feet to Inches
1 foot = 12 inches exactly. Multiply feet by 12 to get inches. So 5 ft × 12 = 60 in. This is a clean integer relationship - 1 foot is defined as 12 inches by definition, no decimal conversion factor.
Most common when expressing height in pure inches (5 ft 10 in = 70 in total) for medical records or measurement systems that prefer single units. American shoe sizes are based on inches; American doorways and ceilings are typically described in feet but technical specifications use inches.
Common Feet to Inches Conversions
| Feet | Inches |
|---|---|
| 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 |
Frequently Asked Questions
Why 12 inches in a foot?
Historical convention from medieval English measurement. Twelve was a useful base for practical fractions (halves, thirds, quarters, sixths) before decimal calculations were common. The 12-inch foot has been standardised in the imperial system since the 14th century.
How tall is 5 ft 10 in in inches?
70 inches (5 × 12 = 60, plus 10 = 70). Multiply feet by 12 and add the leftover inches. 5'5" = 65 in, 6 ft = 72 in, 6'4" = 76 in.
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