How do I convert treadmill speed to pace?

Divide 3,600 by the speed. At 6 mph that is 3600 ÷ 6 = 600 seconds per mile, or a 10:00 min/mile pace. The same maths in km/h gives the pace per kilometre: 10 km/h is 3600 ÷ 10 = 360 seconds, a 6:00 min/km pace. The calculator does both at once.

What incline simulates outdoor running?

A treadmill belt assists you slightly and there is no air resistance, so a small incline restores the effort. A common rule is that each 1% of incline makes the effort about 12–15 seconds per mile harder — at 2% your 10:00 treadmill mile feels closer to a 9:36 outdoor mile.

Is treadmill running easier than outdoors?

Usually a little, because the belt helps your stride turnover and you avoid wind resistance and uneven terrain. The difference is small at slow speeds and grows as you speed up. Adding a 1–2% incline closes most of the gap for everyday running paces.

What treadmill speed is a 10-minute mile?

6.0 mph. Pace and speed are reciprocals: a 10:00 min/mile means you cover one mile in ten minutes, which is six miles per hour. In metric that is roughly 9.66 km/h, a pace of about 6:13 min/km.

Should I set the treadmill to 1% incline?

A 1% incline is a popular default because research suggests it makes the energy cost of treadmill running match running outdoors at the same pace, for speeds around 7–8 mph and faster. At slower jogging speeds even a flat belt is a fair approximation.

Treadmill Pace Calculator

Convert any treadmill speed to a running pace per mile and per kilometre, and estimate the outdoor-equivalent pace once you add an incline. Enter speed in mph or km/h.

How it works

A treadmill shows your speed — how far you would travel in an hour — while runners usually think in pace, the time to cover one mile or one kilometre. The two are reciprocals: pace in seconds equals 3,600 (the seconds in an hour) divided by the speed. So 6 mph is 3600 ÷ 6 = 600 seconds, a 10:00 min/mile pace.

For incline, the calculator applies a rule-of-thumb correction: because a flat belt is a little easier than the road, each 1% of incline subtracts roughly 12 seconds per mile to approximate the outdoor-equivalent effort. This is an estimate for training planning, not a precise physiological model.

Worked example

Set the belt to 6.0 mph. Pace = 3600 ÷ 6 = 600 s, which is a 10:00 /mile pace (about 6:13 /km). Now raise the incline to 2%: subtract 2 × 12 = 24 seconds, so the outdoor-equivalent effort is about 9:36 /mile.

Treadmill speed → pace reference

Flat-belt pace for common treadmill speeds:

Speed (mph)	Pace / mile	Pace / km
5.0	12:00	7:27
6.0	10:00	6:13
7.0	8:34	5:20
8.0	7:30	4:40
9.0	6:40	4:09
10.0	6:00	3:44

Related tools

For pace from a distance and finish time, use the Pace Calculator. To estimate energy burned on the treadmill, see the Running Calorie Calculator.

Frequently asked questions

How do I convert treadmill speed to pace?: Divide 3,600 by the speed. At 6 mph that is 3600 ÷ 6 = 600 seconds per mile, or a 10:00 min/mile pace. The same maths in km/h gives the pace per kilometre: 10 km/h is 3600 ÷ 10 = 360 seconds, a 6:00 min/km pace. The calculator does both at once.
What incline simulates outdoor running?: A treadmill belt assists you slightly and there is no air resistance, so a small incline restores the effort. A common rule is that each 1% of incline makes the effort about 12–15 seconds per mile harder — at 2% your 10:00 treadmill mile feels closer to a 9:36 outdoor mile.
Is treadmill running easier than outdoors?: Usually a little, because the belt helps your stride turnover and you avoid wind resistance and uneven terrain. The difference is small at slow speeds and grows as you speed up. Adding a 1–2% incline closes most of the gap for everyday running paces.
What treadmill speed is a 10-minute mile?: 6.0 mph. Pace and speed are reciprocals: a 10:00 min/mile means you cover one mile in ten minutes, which is six miles per hour. In metric that is roughly 9.66 km/h, a pace of about 6:13 min/km.
Should I set the treadmill to 1% incline?: A 1% incline is a popular default because research suggests it makes the energy cost of treadmill running match running outdoors at the same pace, for speeds around 7–8 mph and faster. At slower jogging speeds even a flat belt is a fair approximation.

Related calculators

Disclaimer. These are estimates for training planning. The incline-to-outdoor equivalence is an approximate rule of thumb and varies with speed, fitness and conditions. Not medical advice.