Speed Converter

What is Speed Converter

A speed converter turns a velocity from one unit into all the others: kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), knots (kn), and feet per second (ft/s). Type a number into any field and the rest update at once, so you can read a foreign speed limit, a wind speed, or a running pace in whatever unit you actually think in.

How to use

1. Type a speed into any of the five fields (km/h, mph, m/s, knots, or ft/s).
2. Watch the other fields update instantly with the equivalent speed.
3. Click the copy icon next to any field to copy that value.
4. Click Clear to reset every field and start over.

When to use it

Driving abroad and the sign says 100 km/h? Type it in and you get 62.14 mph right away, so you know exactly how fast that is. The same field turns a 10 m/s wind into 36 km/h, or a boat's 20 knots into 37.04 km/h, handy for weather reports, sailing, and physics homework alike.

Frequently asked questions