Inches to CM
Inches to centimeters, updated live. 1 inch is exactly 2.54 cm — type any value and the table below follows along.
- Fewer clicks, keyboard friendly
Quick reference
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 6 | 15.24 |
| 12 | 30.48 |
| 24 | 60.96 |
| 36 | 91.44 |
Height converter (feet & inches ↔ cm)
How to use
- Type a value and pick the units to convert from and to.
- Press the swap button to flip the two units instantly.
- Check the quick reference table for common values in your chosen units.
- Enter a height in feet and inches, or in centimeters, to convert it instantly.
Exact conversion factors
This converter uses exact international definitions, not rounded approximations: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 yard = 0.9144 m and 1 mile = 1609.344 m, all fixed by the 1959 international yard and pound agreement. The calculation keeps those full factors rather than substituting a rounded conversion rate. You can paste comma-grouped numbers such as 1,234.5, and very small or large finite results use scientific notation so they remain readable.
Converting a height in feet and inches
A height given in feet and inches converts to centimeters as (feet × 12 + inches) × 2.54. For example, 5 feet 7 inches is (5 × 12 + 7) × 2.54 ≈ 170.18 cm, and 6 feet exactly is 182.88 cm. The height converter below does this both ways live: type feet and inches to get centimeters, or type centimeters to get feet and inches (rounded to the nearest 0.1 inch).
Frequently asked questions
How many inches is 1 cm?
One centimeter is approximately 0.3937 inch. The underlying calculation uses the exact definition 1 inch = 2.54 cm before rounding the displayed result.
How many cm is 1 foot?
One foot equals exactly 30.48 cm, since 1 foot is defined as exactly 0.3048 meters.
How many km is 1 mile?
One mile equals exactly 1.609344 km — the international definition agreed in 1959 and still used today.
How do I convert my height in feet and inches to centimeters?
Multiply the feet by 12, add the inches, then multiply the total by 2.54. For example, 5 feet 7 inches is (5×12+7)×2.54 ≈ 170.18 cm — the height converter on this page does this instantly as you type.
Is this length converter accurate?
Yes. It uses the exact international definitions (1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1609.344 m) rather than rounded conversion factors. Very small and very large finite results are shown in scientific notation to keep the value readable.
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Updated 2026-10-19