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
What are some 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 is a speed converter useful?
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.
Which countries use mph instead of km/h?
Only about 17 countries use miles per hour for road speed limits, including the United States, the United Kingdom, and a handful of others. The vast majority of the world — including all of Europe, Asia, Africa, and Latin America — uses kilometres per hour. Knowing which system applies is important when hiring a car or reading a foreign satnav. To check your running pace in different units, see the running pace calculator. Distance measurements often go hand in hand with speed, so the length converter is useful when working across unit systems.