Endurance sport calculators

Precise, free tools for runners, swimmers and cyclists — pace, training zones, race predictions and indoor-to-outdoor conversions. No sign-up. Works in km or miles.

Running

Pace

Running pace calculator

Treadmill

Treadmill to road pace

VDOT

VDOT & training paces

Predict

Race time predictor

Splits

Race splits calculator

Swimming

Pace

Swim pace per 100

Open water

Pool to open water

Cycling

Power

Power to outdoor speed

Speed

Speed / time / distance

Running training plans

Structured plans — running, strength and mobility. Open a plan for the details and secure checkout.

5K · 16 weeks

10K · 16 weeks

Half · 12 weeks