Speed Converter

Convert km/h, mph, m/s, knots and more instantly.

Last updated: 8 Aug 2026

Quick answer

To convert speed, enter a value and choose the units — for example, 1 km/h = 0.621 mph, 1 m/s = 3.6 km/h, and 1 knot = 1.852 km/h. This converter handles km/h, mph, m/s, knots and feet per second, instantly.

From

Convert speed between km/h, mph, m/s, knots and feet per second instantly. Common conversions include kilometres per hour to miles per hour and metres per second to km/h.

How to convert speed units

1 Enter the speed value.
2 Select the units to convert from and to.
3 The converted speed appears instantly.

Frequently asked questions

How do I convert km/h to mph?

Multiply km/h by 0.6214. For example, 100 km/h = 62.14 mph.

How fast is 1 knot?

One knot equals 1.852 km/h or about 1.15 mph.

How do I convert m/s to km/h?

Multiply m/s by 3.6. For example, 10 m/s = 36 km/h.

Is this converter free?

Yes — it is free and runs entirely in your browser.

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