Speed converter

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What is a speed converter?

A speed converter is an online tool that lets you convert between speed units across different measurement systems. It supports kilometers per hour, miles per hour, meters per second, knots and other units.

How to convert speed units?

Select the source unit, enter a speed value and choose the target unit. The converter instantly calculates the result using precise conversion factors.

What are the speed conversion formulas?

Key speed conversion formulas:

  • 1 km/h = 0.621371 mph
  • 1 mph = 1.60934 km/h
  • 1 m/s = 3.6 km/h
  • 1 knot = 1.852 km/h = 1.15078 mph
  • 1 km/h = 0.27778 m/s

Speed conversion examples

Driving: 130 km/h = 80.78 mph. A typical motorway speed in Europe.

Running: 12 km/h = 3.33 m/s. An average recreational jogging speed.

Maritime: 20 knots = 37.04 km/h. A common fast vessel speed.

When to use a speed converter?

A speed converter is useful when driving abroad where speed limits are posted in different units, analysing sports performance, planning sea voyages or solving physics problems that require converting between m/s and km/h.