# How do I convert cm to feet?

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

- Page: https://www.acalculator.org/convert/cm-to-feet
- JSON spec: https://www.acalculator.org/convert/cm-to-feet.json
- Version: c6da71f492fa

## Default answer

Example with the default inputs (Centimeters (cm) 1): 1 cm = 0.032808 ft.

## Inputs

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

## Outputs

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

## Method

ft = cm × 0.0328083989501 (the same as cm ÷ 30.48)

## Assumptions

- 1 centimeter = 0.0328083989501 feet, 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 = 0.032808. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
2. value = 30.48 gives result = 1. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.
3. result = 1 gives value = 30.48. Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8.

## FAQ

### How many feet are in a centimeter?

1 centimeter is 0.032808 feet, from the exact unit definitions (NIST SP 811).

### How do I convert cm to feet?

Multiply by 0.032808: ft = cm × 0.0328083989501 (the same as cm ÷ 30.48). For example, 1 cm × 0.032808 = 0.032808 ft.

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

Multiply by 30.48, or type the feet into the second box and the converter works it out. 1 foot is 30.48 centimeters.

### What is 170 cm in feet and inches?

5.577428 ft: 170 ÷ 30.48. That is 5 ft and 0.577428 × 12 = 6.93 in, so about 5 ft 6.93 in.

### How do I turn decimal feet into feet and inches?

Keep the whole feet, then multiply the decimal part by 12 for the inches: 5.5 ft is 5 ft and 0.5 × 12 = 6 in.

## 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