Treadmill Speed to Pace Converter
Treadmill consoles report speed; training plans are written in pace. The converter below is bidirectional — edit either field and the other follows. It works in km/h, so for a console in mph, read the conversion table underneath first.
Worked example: the belt at 10 km/h
Pace = 60 ÷ speed = 60 ÷ 10 = 6.0 minutes per kilometer, or 6:00/km. In US units that is 6.21 mph and a 9:39 mile.
US console speeds, converted
Most treadmills sold in the United States display mph. Because pace per mile is simply 60 ÷ mph, whole numbers on the dial produce clean mile paces:
| Console (mph) | Speed (km/h) | Pace (min/mile) | Pace (min/km) |
|---|---|---|---|
| 3.0 | 4.83 | 20:00 | 12:26 |
| 4.0 | 6.44 | 15:00 | 9:19 |
| 5.0 | 8.05 | 12:00 | 7:27 |
| 6.0 | 9.66 | 10:00 | 6:13 |
| 7.0 | 11.27 | 8:34 | 5:20 |
| 8.0 | 12.87 | 7:30 | 4:40 |
| 9.0 | 14.48 | 6:40 | 4:09 |
| 10.0 | 16.09 | 6:00 | 3:44 |
The factor behind the second column is the exact one: a mile is 1.609344 km per NIST, so mph × 1.609344 gives km/h. Consoles that let you switch units usually round it to 1.6, which is why the displayed distance drifts from your watch over a long run.
The belt is not the road, and the gap has been measured
Running indoors removes the air you would otherwise have to push aside, so the same speed costs less energy. The standard correction, from Jones and Doust in 1996, is to set the treadmill to a 1% grade, which restores the missing cost — a convention still used to set up laboratory tests today.
It is a correction, not an equivalence. A study of 13 competitive distance runners, all fully habituated to treadmill running, compared running economy on a track against a treadmill already set at 1%. Oxygen cost was significantly better on the track: 215.4 versus 236.8 mL of oxygen per kilogram per kilometer — about 10% more oxygen per kilometer on the belt. Maximal oxygen uptake was statistically the same in both settings, so this was an efficiency difference, not a fitness one, and the authors attribute it to biomechanical adjustments rather than air resistance alone.
The practical translation: a treadmill pace is a real pace, but do not expect an indoor tempo run to convert one-for-one into a road result, and do not panic when the outdoor version feels different at the same number.
Using the converted pace
Once the console number is a pace, compare it with a race target using the 5K pace calculator or the running pace calculator. For repetitions on the belt, the track workout pace calculator shows what a 400 m interval pace looks like in the same units. The pace to km/h converter does the identical arithmetic without the treadmill label, for bike computers and anything else that reports speed.
Frequently asked questions
How do I convert treadmill speed to running pace?
Pace in min/km = 60 ÷ speed in km/h. A belt at 10 km/h is a 6:00/km pace. If your console reads mph, pace in min/mile = 60 ÷ mph, so 6.0 mph is a flat 10:00 mile.
What pace is 6 mph on a treadmill?
A 10:00 mile, which is 9.66 km/h and 6:13 per kilometer. Every whole mph on a US console maps to a tidy mile pace: 5 mph is 12:00, 7 mph is 8:34, 8 mph is 7:30.
Is treadmill running easier than outdoor running?
At the same speed, yes — there is no air to push through. Even with the belt set to a 1% grade, one study of 13 competitive distance runners found they used roughly 10% more oxygen per kilometer on the treadmill than on a track.
Should I set the treadmill to a 1% incline?
It is a reasonable default, and it comes from a 1996 study showing a 1% grade offsets the missing air resistance. Treat it as a correction, not a conversion — the belt still is not the road.
Why does the treadmill feel harder than the road anyway?
Heat, mostly, plus the lack of a breeze and the absence of the visual flow that makes outdoor effort feel like progress. Perceived exertion and metabolic cost are different questions and often disagree.
Sources
- Mooses M, Tippi B, Mooses K, Durussel J, Mäestu J. Better economy in field running than on the treadmill: evidence from high-level distance runners. Biol Sport, 2015;32(2):155-159
- NIST Guide to the SI, Appendix B.9 — Factors for Units Listed Alphabetically (1 mile = 1.609 344 km exactly)
Written by Lucas Silva · Reviewed by Lucas Silva · Updated on August 15, 2026