# How do I convert feet to cm?

Converts feet (ft) to centimeters (cm) and back, with the exact unit definitions.

- Page: https://www.acalculator.org/convert/feet-to-cm
- JSON spec: https://www.acalculator.org/convert/feet-to-cm.json
- Version: 6bccb94d2210

## Default answer

Example with the default inputs (Feet (ft) 1): 1 ft = 30.48 cm.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| value | Feet (ft) | The amount in feet to convert. |
| result | Centimeters (cm) | The same amount in centimeters. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| value | Feet (ft) | The amount in feet to convert. |
| result | Centimeters (cm) | The amount in centimeters. |

## Method

cm = ft × 30.48

## Assumptions

- 1 foot = 30.48 centimeters, from the exact definitions in NIST SP 811.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits.

## Worked examples

1. value = 1 gives result = 30.48. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
2. value = 6 gives result = 182.88. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
3. result = 182.88 gives value = 6. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.

## FAQ

### How many centimeters are in a foot?

1 foot is 30.48 centimeters, from the exact unit definitions (NIST SP 811).

### How do I convert feet to cm?

Multiply by 30.48: cm = ft × 30.48. For example, 1 ft × 30.48 = 30.48 cm.

### How do I convert cm back to feet?

Multiply by 0.032808, or type the centimeters into the second box and the converter works it out. 1 centimeter is 0.032808 feet.

### What is 5 ft 6 in in cm?

167.64 cm: 6 in is 0.5 ft, and 5.5 × 30.48 = 167.64.

### What is 6 feet in cm?

182.88 cm: 6 × 30.48.

## Sources

- NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B.8: Factors for Units Listed Alphabetically (bold factors are exact), retrieved 2026-10-18. https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8