Average Speed Calculator: Distance, Time & Multiple Stages

 

Calculate average speed from total distance and elapsed time. Enter one stage or combine up to 20 stages, including stops as zero-distance stages with a positive duration. Results include km/h, mph and m/s.

Use this distance unit for every stage. Changing the unit clears the stages to avoid relabeling existing values.

JavaScript is required for this calculator. The formulas and examples below remain available.

Average speed formula

Average speed = total distance / total elapsed time. Convert time to hours for km/h or mph. For example, a 150 km trip lasting 2 hours 30 minutes has an average speed of 150 / 2.5 = 60 km/h. This equals approximately 37.282272 mph or 16.666667 m/s.

Several stages: add distance and time first

For Stage 1, enter Distance 60, Hours 1, Minutes 0 and Seconds 0. Add Stage 2 and enter Distance 60, Hours 2, Minutes 0 and Seconds 0, using Kilometers (km). The total is 120 km over 3 hours, so the average speed is 40 km/h. Averaging the stage speeds of 60 and 30 gives 45, which is incorrect because the stages last different amounts of time.

Include stops when measuring elapsed speed

To include a 15-minute stop, add a stage with Distance 0, Hours 0, Minutes 15 and Seconds 0. If you want moving speed instead, omit stops consistently. The tool cannot identify stops automatically. A stationary interval can have zero distance, but every stage needs positive time. Zero distance for the whole journey gives zero speed.

Units, limits and rounding

One international mile equals exactly 1.609344 km. The calculator converts the combined result to km/h, mph and m/s. Each stage supports distances from 0 to 1000000 with up to six decimal places, hours from 0 to 10000, and minutes and seconds from 0 to 59 as whole numbers. These are software limits. Results show up to six decimal places, with positive values below 0.000001 shown as a threshold rather than zero. Calculations retain unrounded values.

Speed is different from velocity

Distance counts the full path traveled. Average velocity uses displacement and direction instead. Returning to your starting point can produce zero average velocity while average speed remains positive. This calculator uses distance only; it does not calculate routes, traffic conditions, instantaneous speed, pace or safe driving speeds.

Privacy

Calculations happen locally in your browser. This calculator does not save or transmit entries. The hosting website may use separate analytics or advertising services under its privacy policy.

Step-by-step average speed guide

Read How to Calculate Average Speed: Distance, Time and Multiple Stages for worked examples, stops, unit conversions and why averaging individual speeds can be misleading.

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