Average Speed Calculator
Work out average speed instantly with clear inputs, formula shown and shareable results.
About Average Speed Calculator
Average speed is total distance over total time, and it deliberately ignores what happened in between - a journey with stops has a lower average speed than its cruising speed. It is a scalar, so a return trip covering 150 m each way in 20 s total averages 15 m/s even though the average velocity is zero.
Formulas
Average speed
v = total distance / total time
Unit conversion
km/h = m/s x 3.6
Worked example
With the default values below, Average Speed Calculator returns Average Speed of 7.500. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Total distance travelledminimum 0 m
- 150 m
- Total time takenminimum 0 s
- 20 s
Results
- Average Speed
- 7.500 m/s
- Same Speed In km/h
- 27.000
- Same Speed In mph
- 16.777
- Time Per Metre
- 0.1333 s/m
Step by step
- 1Values used
- 2Average speed
- 3Unit conversion
- 4Average Speed= 7.500 m/s
- 5Same Speed In km/h= 27.000
- 6Same Speed In mph= 16.777
- 7Time Per Metre= 0.1333 s/m
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
Is average speed the same as the average of the speeds?
Not usually. Driving 60 km at 60 km/h then 60 km at 30 km/h averages 40 km/h, not 45, because more time is spent at the slower speed.
What is the difference from average velocity?
Velocity uses displacement rather than path length, so a closed loop has zero average velocity but a positive average speed.