Treadmill pace calculator
Convert treadmill speed and incline to pace, and see roughly what the effort equals on flat ground outdoors.
Speed to pace at this incline
| Speed | Treadmill pace | Outdoor equivalent |
|---|
Turn this result into a full Race Pace Plan. Tell us your race and goal time. You get one PDF with:
- Goal pace and splits for your race
- Training paces for all five zones
- A printable pace band
How the conversion works
Treadmill pace is simply the inverse of belt speed. The outdoor equivalent uses the ACSM running equation, where each percent of incline adds energy cost, and subtracts 1 % because there is no air resistance on a treadmill.
outdoor speed ≈ speed × (1 + 4.5 × (incline − 1 %))Research by Jones and Doust (1996) found that a 1 % incline best matches the energy cost of flat outdoor running at moderate to fast speeds. Treat the result as an estimate; belt calibration varies between machines.
Common questions
Should I always set the treadmill to 1 %?
For steady running, 1 % is a good default. At slow speeds the difference is small, so 0–1 % both work.
Why does treadmill running feel harder?
Heat builds up indoors without airflow, and many people tense up on the belt. A fan helps more than you would expect.