---
title: "Speed converter — every unit"
description: "Convert between every speed unit: meter per second, kilometer per hour, mile per hour, knot and more. Tables, exact formulas and a calculator."
url: https://atoneplace.net/convert/speed/
site: "At One Place"
---

# Speed conversions

Every speed unit on the site, and every conversion between them. Each page shows a full table, the exact formula and a live calculator.

## All speed units

*Every speed unit and its size relative to the base unit.*

| Unit | Symbol | In meter per second |
| --- | --- | --- |
| meter per second | m/s | 1 |
| kilometer per hour | km/h | 0.2777777778 |
| mile per hour | mph | 0.44704 |
| knot | kn | 0.5144444444 |
| foot per second | ft/s | 0.3048 |
| mach | Mach | 340.29 |
| speed of light | c | 299,792,458 |

## Common conversions

- [Meters per second to Kilometers per hour](https://atoneplace.net/convert/meters-per-second-to-kmh/)
- [Meters per second to Miles per hour](https://atoneplace.net/convert/meters-per-second-to-mph/)
- [Meters per second to Knots](https://atoneplace.net/convert/meters-per-second-to-knots/)
- [Kilometers per hour to Meters per second](https://atoneplace.net/convert/kmh-to-meters-per-second/)
- [Kilometers per hour to Miles per hour](https://atoneplace.net/convert/kmh-to-mph/)
- [Kilometers per hour to Knots](https://atoneplace.net/convert/kmh-to-knots/)
- [Miles per hour to Meters per second](https://atoneplace.net/convert/mph-to-meters-per-second/)
- [Miles per hour to Kilometers per hour](https://atoneplace.net/convert/mph-to-kmh/)
- [Miles per hour to Knots](https://atoneplace.net/convert/mph-to-knots/)
- [Knots to Meters per second](https://atoneplace.net/convert/knots-to-meters-per-second/)
- [Knots to Kilometers per hour](https://atoneplace.net/convert/knots-to-kmh/)
- [Knots to Miles per hour](https://atoneplace.net/convert/knots-to-mph/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)