Speed Converter

Speed Converter

Local Processing

Convert between speed units including meters per second, kilometers per hour, miles per hour, feet per second, and knots.

How It Works & Processing Standards

Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.

Converts road speeds (km/h, mph), science and wind speeds (m/s) and marine or aviation speeds (knots).

How to Use Speed Converter

  1. 1
    Enter a valueDecimals and negative numbers (for temperature, say) are accepted.
  2. 2
    Choose unitsPick the unit you have and the unit you want. The swap button reverses the direction.
  3. 3
    Read, copy or shareResults show up to six decimal places. Copy them or create a share link with the same value.

Examples

100 km/h in mph
Input: 100 km/h → mph
Result: 62.137119
20 knots in km/h
Input: 20 kn → km/h
Result: 37.04

Common Use Cases

  • Speed limits abroad in km/h
  • Typhoon wind speeds from m/s to km/h
  • Understanding ship speeds in knots

Frequently Asked Questions (FAQ)

What is a knot?

One nautical mile (1.852 km) per hour, i.e. 1.852 km/h.

A quick way from m/s to km/h?

Multiply by 3.6. 10 m/s is 36 km/h.

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