Treadmill Pace Chart: Convert Any Speed to Pace

To turn a treadmill speed into a pace, divide 60 by the speed. A treadmill set to 6.0 mph is running a 10:00 mile, 7.5 mph is an 8:00 mile, and 10.0 mph is a 6:00 mile. The charts below do that math for every tenth of a mile per hour from 4.0 to 12.0, and for the common kilometer speeds, so you can find a pace without stopping mid-run to divide in your head.

Converting is the easy part. Whether that pace means the same thing it would on the road is murkier, because the missing wind, the warm room, the belt's calibration and your watch all nudge the number. Those come after the charts.

Treadmill pace chart in miles per hour

Pace is shown per mile and per kilometer. The 5K and 10K columns are your finish time if you held that speed the whole way.

Treadmill pace chart in kilometers per hour

How the conversion works

Speed and pace are the same number turned upside down. Pace in minutes per mile is 60 divided by miles per hour, so 8.0 mph works out to 60 ÷ 8 = 7.5 minutes, a 7:30 mile. Pace per kilometer is 60 divided by kilometers per hour. To move between units, 1 mph is 1.609 km/h, which is why a treadmill set to 10 km/h is running 6.2 mph and a 9:39 mile.

Does 1% incline make the treadmill match running outside?

The 1% rule traces back to a single study. In 1996, Jones and Doust had nine trained runners do six-minute efforts at speeds from 2.92 to 5.0 meters per second, roughly a 9:11 mile down to a 5:22 mile, on a treadmill at 0, 1, 2 and 3% grades and once on a flat road. Across that range, the oxygen cost of road running matched the treadmill at a 1% grade (Journal of Sports Sciences).

The reason is air. Outside, you push through it with every stride, and the cost grows as you speed up; on a belt you run in still air. RunnersConnect's Jeff Gaudette puts the missing resistance at roughly 14 to 19 seconds per mile across the paces that study tested, and the 1% grade is what replaces it. He also points out that the study never tested paces slower than 9:11, where about 0.5% is the extrapolated match (RunnersConnect).

The rule isn't settled science, though. A 2024 study of 14 highly trained runners at 14 km/h, about a 6:54 mile, found oxygen uptake 12.6% higher on a treadmill set to 1% than on a track. In a follow-up with four runners, the 1% grade alone added 4.4% compared with a flat belt, so on that machine the incline widened the gap instead of closing it (Current Issues in Sport Science). That was one treadmill model, and the authors' advice was to test your own equipment rather than trust a universal correction.

So treat 1% as a sensible default for paces between about 9:00 and 5:20 per mile, not as a law. At easy paces slower than that, the air you'd be pushing through matters less, and 0 to 0.5% is enough. If 1% makes a familiar pace feel clearly harder than it does outside, trust the effort.

Why the same pace can feel different indoors

Heat. Without moving air, sweat evaporates slowly and you heat up faster, which makes a steady pace feel harder than it should (Canadian Running). A fan aimed at your chest does more for treadmill pace than any setting on the console.

Calibration. The display is only as good as the machine's calibration. A lab-grade treadmill tested at Martin Luther University Halle-Wittenberg ran about 2% off its set speed on average, with single readings near 4% (h/p/cosmos test report). Gym machines that see years of heavy use get no such testing, which helps explain why runners report everything from a minute per mile faster indoors to noticeably slower (r/running).

Your watch. Indoors, a watch can't use GPS, so its pace is an estimate unless you pair a foot pod, and watch-versus-treadmill comparisons are a common source of confusion (r/running). Garmin's fix is to run at least a mile, then enter the treadmill's distance so the watch can calibrate (Garmin).

Your stride. The mechanics are closer than most runners assume. A 2020 review of 33 studies found treadmill and overground running largely comparable, with the clearest difference a flatter foot angle at landing on the belt (Sports Medicine).

Turning incline into a flat-ground pace

Incline work is where the chart alone falls short, because 7.0 mph at 3% is not an 8:34 effort. The ACSM running equation, a long-standing way to estimate the oxygen cost of treadmill exercise, adds 0.9 × speed × grade on top of the 0.2 × speed it takes to run on the flat (IDEA Health & Fitness Association). Worked through, each 1% of grade costs about 4.5% more than the same speed on a flat belt, which gives these effort equivalents:

Read the table as an estimate of effort, not a promise. The equation is meant for speeds above 5 mph, real hills come with descents a treadmill skips, and some runners are simply more economical on a grade than others.

Using the chart in your training

The chart works best when it starts from paces you already trust. If your easy runs outside sit around 10:00 a mile, set 6.0 mph and let your breathing confirm it rather than chasing the number. A tempo run is where the treadmill earns its keep, because the belt holds the pace steady when your attention drifts. For race-goal paces, the half marathon pace chart lists every finish time from 1:15 to 3:30, and those paces read straight across to a speed here. The 12-3-30 workout sits at the other end of the console, as a 30-minute walk at 3.0 mph and 12% incline.

During a treadmill-heavy stretch of winter, RunnersConnect suggests taking one hard session outside every two to three weeks so your indoor paces stay honest (RunnersConnect).

FAQ

What pace is 6 mph on a treadmill?

6.0 mph is a 10:00 mile, or 6:13 per kilometer. Held for 3.1 miles, that's a 31:04 5K.

What treadmill speed is a 9-minute mile?

Exactly 9:00 is 6.67 mph. Most treadmills step in tenths, so 6.7 mph gives an 8:57 mile and 6.6 mph gives 9:05.

Should I always run at 1% incline?

For paces between about 9:00 and 5:20 per mile, 1% is a reasonable default backed by the original research. At slower paces 0 to 0.5% is enough, and a 2024 study on one treadmill model suggests 1% can overshoot, so let effort have the final say.

Is running on a treadmill easier than running outside?

At the same speed, a flat treadmill takes slightly less energy because there's no air to push through, which is what the 1% grade corrects for. Heat and monotony often make it feel harder anyway.

How can I check if my treadmill is accurate?

Use the method the lab used. Measure the belt's full length, mark it with a strip of tape, then time a set number of rotations at a fixed speed. Belt length times rotations, divided by the time, gives the true speed.

If the speed on the console and the effort in your legs disagree, the effort is the one to trust.