Speed, Pace & Travel Time Calculator
Work out speed, running pace, travel time or distance from the other two. Results appear in mph, km/h, m/s and knots, with pace per mile and per kilometre and split times for common race distances.
Written by Suhaib Hassan. Figures are estimates you can edit. Our methodology.
It applies speed = distance ÷ time in metres and seconds, then converts to every unit using exact factors.
Race training, road trips and boating all need the same three-way relationship in different units. This does the conversions for you.
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| Distance | Time |
|---|
Speed and pace benchmarks
Common speeds in every unit. Pace is minutes per mile or per kilometre.
| Activity | mph | km/h | min/mi | min/km | m/s |
|---|---|---|---|---|---|
| Casual walk | 3.00 | 4.83 | 20:00 | 12:26 | 1.34 |
| Brisk walk | 4.00 | 6.44 | 15:00 | 9:19 | 1.79 |
| Easy jog | 6.00 | 9.66 | 10:00 | 6:13 | 2.68 |
| Marathon in 4 hours | 6.55 | 10.55 | 9:09 | 5:41 | 2.93 |
| Marathon in 3 hours | 8.74 | 14.06 | 6:52 | 4:16 | 3.91 |
| 4-minute mile | 15.00 | 24.14 | 4:00 | 2:29 | 6.71 |
| 100 m world record average (9.58 s) | 23.35 | 37.58 | 2:34 | 1:36 | 10.44 |
| Motorway limit, 70 mph | 70.00 | 112.65 | 0:51 | 0:32 | 31.29 |
| High-speed train, 300 km/h | 186.41 | 300.00 | 0:19 | 0:12 | 83.33 |
Formulas
How the numbers are worked out.
Speed
Distance divided by time. Time and distance follow by rearranging.
speed = distance ÷ time
time = distance ÷ speed
distance = speed × timePace
Pace is time per unit distance, the inverse of speed.
pace per mile = 60 ÷ mph minutes
pace per km = 60 ÷ km/h minutesUnit conversions
Exact conversion factors.
1 mile = 1,609.344 m
1 knot = 1.852 km/h
1 m/s = 3.6 km/hWorked examples
Illustrative figures, each checked by hand. The first is the default setup.
Marathon in 3:30
26.2 miles in 3 hours 30 minutes (the default).
pace = 60 ÷ 7.486 = 8:01 per mile, 4:59 per km
Drive time
180 miles at 60 mph.
Distance covered
Running at 9 km/h for 45 minutes.
How to calculate speed, pace or time
- Choose what to solve for.
- Enter the two values you know: distance and time, or speed and either of them.
- Use a preset for standard race distances.
- Read speed, pace and split times.
Average figures assume a constant speed. Real journeys include stops, hills and changes of pace.
By Suhaib Hassan · Reviewed 29 September 2026 · How CalculatePilot verifies formulas →
Sources
- NIST, Guide for the Use of the International System of Units (SI), Special Publication 811.
- World Athletics, Technical Rules, standard distances and records.
- International Bureau of Weights and Measures, The International System of Units, definition of the knot and nautical mile.
Frequently asked questions
How do I calculate speed?
Divide the distance by the time taken. 26.2 miles in 3.5 hours is 7.49 mph.
How do I convert pace to speed?
Divide 60 by the pace in minutes per mile to get mph. An 8:00 mile is 60 ÷ 8 = 7.5 mph.
How long is a marathon?
42.195 kilometres, which is 26.2 miles (26 miles 385 yards).
What is a knot?
One nautical mile per hour, or 1.852 km/h. It is used at sea and in aviation.
Is average speed the same as average of speeds?
No. Average speed is total distance divided by total time. Driving out at 60 mph and back at 40 mph averages 48 mph, not 50.
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