How to convert feet to inches
1 ft = 12 in
1 ft = 12 in exactly (NIST Handbook 44; the UK Weights and Measures Act 1985 also defines the inch as 1/36 yard). Multiply feet by 12.
Examples
- 5.5 ft = 66 in: A height written in decimal feet
- 6.5 ft = 78 in: A doorway of this height
- 2.75 ft = 33 in: A shelf length from a decimal-feet plan
Feet to inches chart
| Feet (ft) | Inches (in) |
|---|---|
| 1 ft | 12 in |
| 2 ft | 24 in |
| 2.75 ft | 33 in |
| 3 ft | 36 in |
| 4 ft | 48 in |
| 5 ft | 60 in |
| 5.5 ft | 66 in |
| 6.5 ft | 78 in |
| 10 ft | 120 in |
| 15 ft | 180 in |
| 20 ft | 240 in |
| 25 ft | 300 in |
| 50 ft | 600 in |
| 75 ft | 900 in |
| 100 ft | 1,200 in |
Common mistakes
- The marks are easy to swap: 6′ means 6 feet and 6″ means 6 inches.
- Area and volume use bigger factors: 144 in² per ft² and 1,728 in³ per ft³.