Utility Stack
Free running calculator
Convert treadmill speed to mile pace, kilometer pace, and estimated race times while you plan a run.
Pace result
For miles per hour, divide 60 by the treadmill speed to get minutes per mile. For kilometers per hour, divide 60 by the speed to get minutes per kilometer. This calculator shows both mile and kilometer pace automatically.
Use the workout distance and target time fields when you are trying to match a planned run. For example, if you want a 30 minute 5K effort, the target speed estimate gives you a treadmill setting to start from.
A 10 minute mile is 6.0 mph on a treadmill. Faster speeds produce lower pace times, so 7.5 mph is an 8 minute mile and 5.0 mph is a 12 minute mile.
Small speed changes can matter during longer workouts. Moving from 6.0 mph to 6.2 mph may look minor on the console, but over several miles it changes both pace and total workout time.
Use this quick reference when you need a starting setting before fine-tuning the workout.
| Speed | Mile pace | Kilometer pace |
|---|---|---|
| 5.0 mph | 12:00 / mi | 7:27 / km |
| 6.0 mph | 10:00 / mi | 6:13 / km |
| 7.5 mph | 8:00 / mi | 4:58 / km |
| 10.0 mph | 6:00 / mi | 3:44 / km |
The belt speed determines the displayed pace, but incline changes workout effort. Many runners use a small incline for variety, while hill workouts use higher incline settings for strength and effort.
This calculator does not convert incline into an outdoor-equivalent pace because effort depends on fitness, stride, treadmill calibration, and workout purpose. Treat incline notes as training context rather than medical or coaching advice.
Start with the purpose of the run, then choose a speed that lets you finish the workout with the right effort. A recovery run, steady run, tempo workout, and interval session should not all use the same setting.
| Workout goal | Typical feel | Planning note |
|---|---|---|
| Easy jog | Conversational | Use a speed you can hold without strain. |
| Steady run | Moderate | Faster than easy, but controlled. |
| Tempo | Sustainably hard | Keep enough margin to finish smoothly. |
| Intervals | Hard repeats | Use recovery between faster segments. |
The 5K, 10K, half marathon, and marathon estimates assume you could hold the same pace for the full distance. That is useful for orientation, but real race times depend on endurance, terrain, weather, pacing, and recovery.
If you are building a training plan, use this page as a quick conversion aid and follow guidance from a qualified coach or medical professional when injury risk, health conditions, or aggressive goals are involved.
Common mistakes include mixing mph and km/h, setting a target pace that is too fast for the full workout, ignoring warmup and cooldown time, or comparing treadmill speed directly to outdoor running without considering conditions.