Average Speed Calculator
Work out your average speed from the distance and the travel time, in km/h and mph.
Average speed
100 km/h
150 km
In miles per hour
62.1 mph
Please note: The result is an estimate and has been rounded. Actual costs and values may differ, and no rights can be derived from this calculation.
How this number is calculated
The blocks use your input. Change a value above and they update with it.
Step 1 · Travel time in hours
Step 2 · Average speed
Step 3 · In miles per hour
How the calculation works
This calculator shows how fast you drove, cycled or ran on average. Enter the distance and the travel time in hours and minutes to get your average speed in km/h and in mph.
Want to know how long a trip takes at a given speed instead? Use the Travel Time Calculator in the same category.
The hours plus the minutes divided by 60 give the travel time in hours. The distance divided by that time is the average speed in km/h. Divided by 1.609344 (kilometers per mile) it is the speed in mph. If you enter the distance in miles, the calculator first converts it to kilometers.
The speed is rounded to one decimal, with a half rounded up. If the travel time is 0, the result is 0, because you cannot divide by 0.
It is an average over the whole trip: stops and speeding up count too, so your top speed was higher.
Formula
Average speed = distance ÷ (hours + minutes ÷ 60). Speed in mph = speed in km/h ÷ 1.609344.
Assumptions
- The speed is an average over the whole distance and the whole travel time.
- All the time you enter counts, including stops and breaks.
- The distance is the distance actually covered, not as the crow flies.
- Seconds are not included: you enter the travel time in whole minutes.
- The speed is rounded to one decimal.
Example calculations
The button fills in the calculator above, so you can carry on from there.
-
Commute by car
Average speed
55.2 km/h
Distance 23 km · Travel time: hours 0 · Travel time: minutes 25
-
Bike ride
Average speed
19.1 km/h
Distance 35 km · Travel time: hours 1 · Travel time: minutes 50
-
10 km run
Average speed
10.9 km/h
Distance 10 km · Travel time: hours 0 · Travel time: minutes 55
Frequently asked questions
How do I calculate average speed?
Divide the distance by the time in hours. 150 km in 1 hour and 30 minutes (1.5 hours) is 150 ÷ 1.5 = 100 km/h. 100 miles in 2 hours is 50 mph.
What is my speed if I drive 45 km in half an hour?
Half an hour is 0.5 hours. 45 ÷ 0.5 = 90 km/h on average, which is 55.9 mph.
How many km/h is 60 mph?
A mile is 1.609344 km, so 60 mph is 60 × 1.609344 = 96.6 km/h. The other way round, 100 km/h is about 62.1 mph.
How do I convert a running pace to speed?
Divide 60 by your pace in minutes per kilometer or per mile. A pace of 6 minutes per kilometer is 60 ÷ 6 = 10 km/h, and 10 minutes per mile is 6 mph. In the calculator, enter 1 km and 6 minutes.
Why is my average speed lower than I expected?
All the time counts, including waiting at traffic lights, speeding up and slowing down. Your speed on the open road is therefore higher than your average over the whole trip.
How do average speed cameras work?
They record when a vehicle passes two points a known distance apart. That distance divided by the time taken is the average speed: the same calculation as this calculator.
Sources and checks
Sources
- Average speed enforcement cameras around roadworks | National Highways
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically
How we check it
This calculator has 19 fixed checks: 14 calculations with a result that is fixed in advance, and 5 cases of invalid input that must be rejected. They all run automatically every time we publish; if one fails, the calculator does not go live.
See the calculations
- Distance 150 km · Travel time: hours 1 · Travel time: minutes 30 → Average speed 100 km/h
- Distance 45 km · Travel time: hours 0 · Travel time: minutes 30 → Average speed 90 km/h
- Distance 500 km · Travel time: hours 4 · Travel time: minutes 40 → Average speed 107.1 km/h
- Distance 100 mi · Travel time: hours 2 · Travel time: minutes 0 → Average speed 80.5 km/h
- Distance 120 mi · Travel time: hours 2 · Travel time: minutes 15 → Average speed 85.8 km/h
- Distance 10.25 km · Travel time: hours 1 · Travel time: minutes 0 → Average speed 10.3 km/h
- Distance 100 km · Travel time: hours 1 · Travel time: minutes 7 → Average speed 89.6 km/h
- Distance 118 km · Travel time: hours 0 · Travel time: minutes 59 → Average speed 120 km/h
- Distance 100,000 km · Travel time: hours 1,000 · Travel time: minutes 59 → Average speed 99.9 km/h
- Distance 0 km · Travel time: hours 1 · Travel time: minutes 0 → Average speed 0 km/h
Changes
- : Clearer help texts for the fields. Sources added and content reviewed.
- : First version.
Last reviewed: · How we build and check our calculators
More calculators
- Car Finance Calculator (Balloon Payment)Work out the monthly payment for car finance with a down payment and a balloon payment, and see what driving really costs you, also per kilometer.
- Buy, Lease or Finance a CarCompare what a car costs per month if you pay cash, take out a car loan or lease it, including depreciation, running costs and interest.
- Car Depreciation CalculatorWork out what your car will be worth in a few years, how much value it loses and what that costs per month.