Free Feet to Inches Converter
Convert feet to inches for expressing heights as a single inch value, lumber and construction dimensions, furniture assembly, and DIY projects requiring precise measurements.
Pick any units and edit either box — it converts instantly in your browser.
Quick answer
To convert feet to inches, multiply by 12. For example, 5 feet and 9 inches equals 69 inches total.
Formula & method
inches = feet × 12
- ft — value in feet
- in — result in inches
- 12 — exact conversion factor (1 ft = 12 in)
To convert back, divide by 12 (1 in = 0.083333 ft).
Feet to Inches — common values
| Feet (ft) | Inches (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 |
| 10 ft | 120 in |
Examples
- Input
- 1 ft
- Result
- 12 in
- Why
- A basic unit of measurement in construction, woodworking, and carpentry.
- Input
- 5 ft
- Result
- 60 in
- Why
- A person who is 5 feet tall, without additional inches.
- Input
- 5.75 ft
- Result
- 69 in
- Why
- Common way to express adult height—converted to 69 inches total.
- Input
- 6 ft
- Result
- 72 in
- Why
- A 6-foot (72-inch) height is common for interior doors and tall people.
Common mistakes
- Rounding too early. Multiply by the full factor (12) first, then round only the final inches value.
- Converting the wrong way. This page goes Feet → Inches; to go back, divide by 12.
Frequently asked questions
Why convert feet to inches?
Expressing height as a single number in inches (e.g., 69 inches instead of 5 ft 9 in) simplifies calculations, comparisons, and data entry. It's also useful in medical records and sports.
How many inches are in 6 feet?
6 feet = 72 inches exactly. Since 1 foot = 12 inches by definition, multiply 6 × 12 = 72.
How do I convert a decimal foot value to feet and inches?
If you have 5.75 feet, the whole number (5) is feet and the decimal part (0.75) × 12 gives inches: 0.75 × 12 = 9 inches. So 5.75 feet = 5 ft 9 in.
Is the conversion always exactly 12 inches per foot?
Yes, by definition. The foot is exactly 12 inches, so this conversion is always precise with no rounding needed.
What's the easiest way to remember feet-to-inches conversion?
Simply multiply by 12. Think: 'Each foot has 12 inches,' so 3 feet = 3 × 12 = 36 inches.
Do builders and carpenters always use this conversion?
Yes—construction specs are often given in feet and inches (e.g., '10 ft 6 in'). Converting to total inches simplifies measurement and layout work.
Sources & references
- NIST Handbook 44 – Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices
- ISO 80000-3:2019 – Quantities and units — Part 3: Space and time
External references open in a new tab. We are independent and not affiliated with these organizations.
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Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.
Built and reviewed by HIFreeTools against the formula shown above and any authoritative references cited on this page. See our methodology and editorial standards.
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