Speed Converter
Speeds across units for driving, travel, and sport.
Speed Converter
Convert between any two speed units instantly.
Kilometers/Hour (km/h)
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What This Calculator Does
The Speed Converter translates between kilometers per hour, miles per hour, knots, and meters per second. It is handy for road-trip math, aviation references, and comparing sports performance.
How It Works
All speeds normalize to km/h, then scale to the target unit. A mile is 1.609344 km and a knot is 1.852 km/h, giving exact cross-unit results.
Example
Convert 60 mph to km/h: 60 x 1.609344 = 96.56 km/h. Convert 20 knots to mph: about 23 mph.
Formula
Result = Input (in km/h) × Target factor1 mile = 1.609344 km, 1 knot = 1.852 km/h.
Reading the Results
Converted Speed
The input speed expressed in the target unit, normalized through km/h for exact cross-unit results.
Frequently Asked Questions
How many mph is 100 km/h?
100 km/h equals about 62.1 mph, using the factor 1 km = 0.621371 miles.
What is a knot?
A knot is one nautical mile per hour, used in aviation and maritime travel. One knot equals about 1.15 mph.
How do I convert m/s to km/h?
Multiply meters per second by 3.6. A 10 m/s sprint is 36 km/h.