Speed Converter
Convert km/h, mph, m/s, knots and more
Result
0.6213711922 mph
Miles per Hour
1 km/h = 0.6213711922 mph
1 km/h in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How the conversion works
Every unit is converted through metres per second. The value is turned into m/s first, then into the unit you want.
mph = km/h × 0.6213712
1 km/h = 0.6213712 mph
Quick km/h to m/s
Divide km/h by 3.6 to get metres per second, and multiply m/s by 3.6 to get km/h. 72 km/h is 20 m/s.
Why ships use knots
A nautical mile matches one minute of latitude, so a speed in knots maps directly onto distances on a navigation chart.
All speed conversions
From meters per second (m/s)+
From kilometers per hour (km/h)+
From miles per hour (mph)+
From feet per second (ft/s)+
From knots (kn)+
From centimeters per second (cm/s)+
More converters
Frequently asked questions
How do I convert km/h to mph?
Multiply by about 0.621371. For example, 100 km/h is about 62.14 mph.
How do I convert mph to km/h?
Multiply by 1.609344. 60 mph is about 96.56 km/h.
What is a knot in km/h?
One knot is exactly 1.852 km/h.