Convert Feet to Inches
1 foot (ft) equals 12 inches (in).
Converting a list? Use the bulk foot to inch converter to paste a column from Excel.
How to Convert Foot to Inch
- 1 ft = 12 in
- 1 in = 0.08333333333 ft
- Example: convert 15 ft to in: 15 ft = 15 × 12 in = 180 in
Reference conditions. ft: The international yard and pound agreement (1959) fixed 1 yard = 0.9144 m exactly, so the inch, foot and mile are exact. in: The international yard and pound agreement (1959) fixed 1 yard = 0.9144 m exactly, so the inch, foot and mile are exact.
Formula
in = ft × 12
Derivation from SI units:
- 1 ft = 12 in = 0.3048 m (exact)
- 1 in = 2.54 cm = 0.0254 m (exact)
- 1 ft = 0.3048 m ÷ 0.0254 m per in = 12 in
Both units are defined exactly, so the factor is exact. Foot definition: foot; Inch definition: inch.
Worked examples
- A height of 5.5 ft is 66 in.
5.5 ft × 12 = 66 in - An 8 ft board is 96 in long.
8 ft × 12 = 96 in
Foot to Inch conversion table
| Feet (ft) | Inches (in) |
|---|---|
| 0.5 ft | 6 in |
| 1 ft | 12 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 |
| 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 |
| 100 ft | 1200 in |
| 500 ft | 6000 in |
| 1000 ft | 12000 in |
| 5280 ft | 63360 in |
| 10000 ft | 120000 in |
| 35000 ft | 420000 in |
Where it's used
Decimal feet from surveys and calculations are converted to inches for cutting lists, framing and fabrication. Multiply by 12.
Foot to other length units
| Conversion | 1 ft equals |
|---|---|
| foot to meter | 0.3048 m |
| foot to kilometer | 0.0003048 km |
| foot to centimeter | 30.48 cm |
| foot to millimeter | 304.8 mm |
| foot to micrometer | 304800 µm |
| foot to nanometer | 304800000 nm |
| foot to angstrom | 3048000000 Å |
| foot to mile | 0.0001893939394 mi |
| foot to yard | 0.3333333333 yd |
| foot to inch | 12 in |
| foot to mil | 12000 mil |
| foot to nautical mile | 0.0001645788337 nmi |
Frequently asked questions
How many inches are in a foot?
Exactly 12.
How many inches are in 1 foot?
1 ft = 12 in.
How do I convert feet to inches?
Multiply the value in ft by 12. For example, 15 ft × 12 = 180 in.
Is the ft to in conversion exact?
Yes. Both units are defined exactly, and 1 ft is exactly 12 in.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot (ft)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch (in)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Feet to Inches. Retrieved October 17, 2026, from https://scientificconverters.com/length/feet-to-inches/
IEEE
Scientific Converters, "Convert Feet to Inches," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/length/feet-to-inches/