TreadPacer

TreadPacer is a set of calculators for treadmill runners. Predict outdoor-equivalent pace and race times, estimate calories, convert treadmill speeds, plan splits, and more — all using science-based formulas (ACSM & Daniels).

Race Predictor

Add intervals (speed, incline, time or distance). We compute VO₂, convert to outdoor-equivalent pace, and predict race times using Daniels’ VDOT.

Adjust if you know your treadmill runs fast/slow.

At ≥9 km/h, 0% incline feels easier indoors. This raises flat runs to 1% to simulate air resistance. This will only show a difference if you are running at 0% incline.

# Speed (km/h) Incline (%) Duration (mm:ss) Action