Speed Converter
Convert km/h, mph, metres per second, knots and feet per second. One knot is exactly 1.852 km/h.
Common speed conversions
| Conversion | Result |
|---|---|
| 1 mph | 1.6093 km/h |
| 1 knot | 1.852 km/h |
| 1 m/s | 3.6 km/h |
| 1 km/h | 0.6214 mph |
| 60 mph | 96.56 km/h |
| 100 km/h | 62.14 mph |
Worked example
Highway speed of 100 km/h: 100 divided by 1.609344 = 62.14 mph. In metres per second, 100 divided by 3.6 = 27.78 m/s. Enter 100, choose Kilometres per hour, then choose Miles per hour to see 62.137119 mph.
Frequently asked questions
What is a knot?
A knot is one nautical mile per hour. A nautical mile is exactly 1,852 m, so one knot is exactly 1.852 km/h. Knots are used in marine and aviation weather reports, including on the Great Lakes and both Canadian coasts.
How do I roughly convert km/h to mph in my head?
Multiply by 0.6 for a rough answer, then add a small correction. For 100 km/h, 0.6 gives 60, and the exact answer is 62.14 mph. The quick version is close enough for reading a US speed limit sign.
Results are provided for general reference. Always follow posted speed limits in the unit shown on the sign.