Speed Converter
Convert between km/h, mph, m/s, knots, and more. Enter a speed value and select the input and output units for instant conversion. Free online speed converter.
Speed converter
Result
What is this?
A speed converter converts between velocity units: km/h, mph, m/s, knots, and more. 1 knot = 1 nautical mile per hour. 1 km/h ≈ 0.621 mph. Used for travel, sports, and physics. Meters per second (m/s) is the SI unit and common in science. Kilometers per hour is used for road speeds in most countries. Miles per hour is standard in the US and UK. Knots are used in aviation and maritime. The calculator handles all common speed units with precise conversion factors.
When to use
Use for driving (mph to km/h), sports (running pace), aviation (knots), or physics. Example: 60 mph = 96.6 km/h; 10 m/s = 36 km/h. Drivers convert speed limits when traveling. Runners convert pace (min/km to min/mile). Pilots and sailors use knots. Physics students work in m/s. Weather reports may use different units. Anyone dealing with speed or velocity needs conversion.
How to use
Enter a speed value and select the source and target units. 1 knot = 1 nautical mile per hour. 1 km/h ≈ 0.621 mph.
Frequently asked questions
- 1 mph = 1.60934 km/h. Multiply miles per hour by 1.60934 to get km/h.
- 1 knot = 1.852 km/h. A knot is one nautical mile per hour.