Converters
Speed Converter
Convert between km/h, mph, m/s, knots, and more
Calculator
0.6213716893
1 Kilometers = 0.6213716893 Miles
Quick Conversions
Meters:0.277778
Knots:0.5399577019
Feet:0.9113451444
Mach:0.0008098483965
Common Conversions
1 km/h = 0.621 mph
1 mph = 1.609 km/h
1 knot = 1.852 km/h
1 m/s = 3.6 km/h
Mach 1 = 343 m/s
Mach 1 = 1234.8 km/h
How to Use
Convert between speed units
1
Enter speed
Input km/h, mph, m/s, knots
2
Select from unit
Choose source unit
3
Select to unit
Choose target unit
4
Copy result
Use converted speed
Speed Conversion
km/h = mph × 1.609 | m/s = km/h ÷ 3.6 | 1 knot = 1.852 km/h
Speed = distance/time. Base SI unit is m/s.
Frequently Asked Questions
Multiply km/h by 0.621 to get mph. Example: 100 km/h = 62.1 mph. Quick tip: divide km/h by 1.6.
Multiply mph by 1.609 to get km/h. Example: 60 mph = 96.5 km/h. Quick tip: multiply mph by 1.6.
1 knot = 1.852 km/h = 1.151 mph. Used in aviation and maritime navigation.
Multiply m/s by 3.6. Example: 10 m/s = 36 km/h. This is because 3600 sec/hour ÷ 1000 m/km = 3.6.
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