Speed, Distance and Time Calculator

Calculate average speed from a positive distance and elapsed time while retaining the units used for both entered quantities.

Calculate average speed

Average speed: 60The result uses the distance unit per time unit entered.

How this tool works

Average speed summarizes total distance divided by total elapsed time. It can differ from instantaneous speed because stops and changes are combined into one overall rate. The calculator stays unit-neutral so users can work in kilometres, miles, metres, hours, or seconds.

Average speed v equals total distance d divided by elapsed time t. The resulting unit is the entered distance unit per entered time unit.

How to use it

  1. Enter the total distance travelled.
  2. Enter positive elapsed time in the intended time unit.
  3. Read average speed and attach distance-per-time units consistently.

Worked examples

Road journey

Input
150 km in 2.5 hours
Output
60 km/h average

Dividing 150 kilometres by two and a half hours gives an average of 60 kilometres for each elapsed hour.

Walking example

Input
6 miles in 2 hours
Output
3 miles per hour

The same distance-over-time relationship applies to any consistent units, producing three miles for each hour in this example.

Limitations

  • Average speed does not show stops, acceleration, direction, or peak speed.
  • The calculator does not automatically convert between distance or time units.