Speed, Distance & Time Calculator
Work out average speed, distance or journey time from the other two.
Result
Fill in the two values you know.
The formula triangle
Speed
S = D ÷ T
100 km in 1 h 20 min = 75 km/h.
Distance
D = S × T
60 mph for 2.5 hours = 150 miles.
Time
T = D ÷ S
120 miles at 60 mph = 2 hours.
For running and cycling paces, try the running pace calculator; for journey fuel costs, the fuel cost calculator.
Frequently asked questions
What is the speed, distance, time formula?
Speed = distance ÷ time, distance = speed × time and time = distance ÷ speed. Keep the units consistent: miles with mph and hours, or km with km/h and hours.
How long does it take to drive 100 miles?
At an average of 50 mph, 2 hours; at 60 mph, 1 hour 40 minutes. Real journeys average less than the speed limit because of junctions, traffic and stops.
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