---
title: "21 km/h to m/s = 5.833333 m/s"
description: "21 kilometers per hour is 5.833333 meters per second. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/21-kmh-to-meters-per-second/
site: "At One Place"
---

# 21 km/h to m/s

**21 kilometers per hour in meters per second: 21 km/h = 5.833333 m/s**

m/s = km/h × 5/18

21 kilometers per hour is 5.833333 meters per second. To get there, multiply by 0.2777777778.

## Values either side

*Kilometers per hour near 21, converted to meters per second.*

| Kilometers per hour | Meters per second |
| --- | --- |
| 17 km/h | 4.722222 |
| 18 km/h | 5 |
| 19 km/h | 5.277778 |
| 20 km/h | 5.555556 |
| 21 km/h ← | 5.833333 |
| 22 km/h | 6.111111 |
| 23 km/h | 6.388889 |
| 24 km/h | 6.666667 |
| 25 km/h | 6.944444 |

## How the conversion works

The relationship is m/s = km/h × 5/18. Both units measure speed, so the conversion is a fixed factor that never changes.

## Common questions

### What is 21 km/h in meters per second?

21 km/h is 5.833333 m/s.

### How do you convert kilometers per hour to meters per second?

Multiply by 0.2777777778.

## Related pages

- [Kilometers per hour to meters per second](https://atoneplace.net/convert/kmh-to-meters-per-second/)
- [21 m/s to km/h](https://atoneplace.net/convert/21-meters-per-second-to-kmh/)
- [17 km/h to m/s](https://atoneplace.net/convert/17-kmh-to-meters-per-second/)
- [18 km/h to m/s](https://atoneplace.net/convert/18-kmh-to-meters-per-second/)
- [19 km/h to m/s](https://atoneplace.net/convert/19-kmh-to-meters-per-second/)
- [20 km/h to m/s](https://atoneplace.net/convert/20-kmh-to-meters-per-second/)
- [22 km/h to m/s](https://atoneplace.net/convert/22-kmh-to-meters-per-second/)
- [23 km/h to m/s](https://atoneplace.net/convert/23-kmh-to-meters-per-second/)
- [24 km/h to m/s](https://atoneplace.net/convert/24-kmh-to-meters-per-second/)
- [25 km/h to m/s](https://atoneplace.net/convert/25-kmh-to-meters-per-second/)

## 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)
- Calculated on this page — At One Place (/about/)