Feet to Inches Converter (ft to in)
Convert feet and inches in either direction using exactly 12 inches per international foot.
How it works
Feet × 12 = inches. Inches ÷ 12 = feet.
Formula / calculation method
inches = feet × 12feet = inches ÷ 12
Worked examples
- 1 foot equals exactly 12 inches.
- 5.5 feet equals exactly 66 inches.
When this tool helps
Useful for height, furniture, room dimensions, construction, product sizes, sports measurements, and everyday US customary length references.
Related calculations: kilometers to miles, millimeters to inches, and centimeters to inches.
Browse this topic: Length & Distance Converters · Length & Distance Standards Guide.
Quick reference
| Input | Result |
|---|---|
| 1 ft | 12 in |
| 5 ft | 60 in |
| 66 in | 5.5 ft |
Accuracy and definitions
The international foot contains exactly 12 inches. Both units are tied to the exact international inch definition.
Reference standards
Where a published measurement definition applies, Solveberry links to primary standards rather than relying only on secondary converter sites.
- NIST Guide to the SI — Appendix B.8 conversion factors
- BIPM SI Brochure — International System of Units
Methodology & verification
- Method
- Feet × 12 = inches. Inches ÷ 12 = feet.
- Verification
- The displayed formula is cross-checked against Solveberry regression cases before release. Calculator inputs and results stay in the browser.
- Last reviewed
- 2026-08-19
Results are calculated locally in your browser. Optional analytics do not include calculator input values or results.
Common questions
How many inches are in one foot?
Exactly 12 inches.
Can I enter decimal feet?
Yes. Decimal values such as 5.5 feet convert directly to inches.
Can I convert in the opposite direction on this page?
Yes. Use the “Convert from” selector or Swap units button; Solveberry keeps both directions on one canonical page.
Why can my result differ slightly from another converter?
Differences usually come from rounding or from selecting a different regional measurement standard. Solveberry shows the factor or standard used on the page.