Unit conversion
Speed converter
Convert kilometres and miles per hour, metres per second and knots.
Your numbers
Both a decimal point and a comma work.
Result
0.621371 mph
Your answer
How it works
R = V × k₁ / k₂
Using the calculator
Enter: Value · From · To. Calculation: R = V × k₁ / k₂.
Worked input and result
Example: Value = 10; From = km/h; To = mph. Result: Your answer = 6.213712 mph.
Understanding the result
One knot is one nautical mile per hour, or 1.852 km/h. One international mile is 1609.344 m. Speed must be nonnegative.
Convert speeds using their defined unit ratios; the numerical value changes but the movement speed does not. Check whether your source uses mph, km/h or m/s.