Free online calculator · Conversion
Speed Converter
Convert speed between miles per hour, kilometers per hour, meters per second and knots.
Formula • Worked example • Interpretation
Convert speed and velocity units
Speed is distance traveled per unit time. Convert between miles per hour, kilometers per hour and other supported units.
Calculation method
Speed = distance ÷ time. 1 mph = exactly 1.609344 km/h.
Worked example
60 mph ≈ 96.56 km/h.
What your result means
Round speeds according to context. A navigation system may show whole numbers while engineering calculations can require greater precision.
Tips for better calculations
Use the fuel economy calculator separately when estimating how much fuel a trip will need.
Assumptions and limitations
This converts numerical speeds; it does not account for direction, acceleration, wind, or changes in driving conditions.
SiCalcs tools provide estimates and educational calculations; they do not replace professional financial, medical, tax, or legal advice.