Speed Calculator
Calculate speed knowing distance and time. Convert between m/s, km/h, mph, and knots.
Formula: v = d / t
v = d / t
Speed
100.00 km/h
Conversions
m/s
27.78
km/h
100.00
mph
62.14
Knots
54.00
Time to travel
100 m3.6 s
1 km0.60 min
10 km6.00 min
100 km1.00 h
Distance over time
550412,5275137,50
What is speed?
Speed is the rate of change of position with respect to time. It indicates how fast an object is moving and in what direction.
Speed formula
Speed is calculated by dividing distance by time: v = d/t. The most common units are m/s and km/h.
Speed units
Units vary by context: m/s in science, km/h on roads, mph in English-speaking countries, and knots in navigation.