Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Convert distance and time into speed in mph and km/h.
The inverse of pace: this tool converts a distance and total time into speed, in both miles per hour and kilometers per hour.
Enter the distance you ran (in miles) and the total time (in minutes). Your speed in mph and km/h appears instantly.
MPH = Distance (miles) / (Total Minutes / 60)
KM/H = MPH × 1.609344
Useful for setting treadmill speed targets (which display in mph or km/h rather than pace), or comparing runs to other speed-based activities. For pace instead (min/mile), see the Running Pace Calculator.
The tool starts with 6 miles in 60 minutes. Time in hours is 60 / 60 = 1, so speed is 6 / 1 = 6.00 mph. Multiplying by 1.609344 gives 9.66 km/h. Try 3.1 miles in 30 minutes: hours are 0.5, speed is 3.1 / 0.5 = 6.20 mph, and the km/h figure is about 9.98. Results are shown with two decimal places, so you can see small improvements between runs.
mph = miles / (minutes / 60). Example: 3.1 / 0.5 = 6.20 mph, and 6.20 x 1.609344 = 9.98 km/h.
The time field takes total minutes and accepts decimals, not a clock format. For a run of 25 minutes and 30 seconds, enter 25.5. For 1 hour 20 minutes, enter 80. Typing 25.30 is read as 25.3 minutes, which is 25 minutes 18 seconds, so be careful. Distance is in miles, and both fields must be above zero for a result to appear. To use kilometers, divide by 1.609344 first, so a 10 km run is about 6.214 miles.
Treadmills generally show speed rather than pace, so this tool works well for planning a session. If you want to hold a specific pace, first work out the mph you need. A run of 5 miles in 45 minutes is 5 / 0.75 = 6.67 mph. Set the treadmill to that speed and compare. Many treadmills increase in fixed steps, such as 0.1 mph, so you may need to choose the nearest setting. Keep in mind that treadmill belts can be slightly miscalibrated, and that indoor and outdoor efforts feel different.
This tool is a calculation aid, not a fitness assessment. If you are new to running or have health concerns, build up gradually and ask a healthcare professional before adding intense workouts.
Most treadmills display speed directly in mph or km/h -- use whichever this tool shows that matches your treadmill's units.
Recreational jogging is commonly in the 5-7 mph range, with trained runners often well above that -- speed varies widely by fitness level and effort.
Both are the same information in different units -- runners often think in pace (min/mile) for road running and speed (mph) for treadmill work; use whichever is more natural for your context.
Both speeds are displayed to two decimal places, so slight improvements are visible.
Divide 60 by your pace in minutes per mile. For example, a 10:00 mile pace is 60 / 10 = 6.0 mph.
That is your choice. Elapsed time includes stops and gives a lower speed, while moving time gives a higher one. Use the same approach each time when comparing.
No. The distance field is in miles, so divide kilometers by 1.609344 first.
Reference: Centers for Disease Control and Prevention