💨 Speed Calculator
Average speed is distance divided by time — the number your trip computer shows. Enter the distance, the time it took, and pick the output unit.
Remember this is an average: stops and traffic mean your cruising speed was higher than the result.
How to use this calculator
Enter how far you traveled and how long it took, then read your average speed in mph or km/h.
- Enter the Distance and pick Miles or Kilometers.
- Enter the Time in hours, decimals allowed.
- Pick whether to show the speed in mph or km/h.
- Read the average speed plus the other unit.
Frequently asked questions
What formula does the Speed Calculator use?
Average speed equals distance divided by time. Distances are converted through kilometers internally so mixed units work.
Can you give a worked example?
120 miles in 2 hours is an average of 60 mph, which equals 96.56 km/h.
Is this my cruising speed?
No, it is the average including all stops. Your cruising speed on the open road was higher than this number.
Can I enter minutes instead of hours?
Enter them as decimal hours: 90 minutes is 1.5 hours, 45 minutes is 0.75 hours.