Free cycling calculators & tools

Estimate your Functional Threshold Power from a 20-minute, ramp or 8-minute test.

Turn your FTP into the 7 Coggan training zones with exact watt ranges.

Work out your W/kg — the number that matters most when the road tilts up.

Model your critical power and anaerobic battery (W′) from two maximal efforts.

Build a 5-zone heart rate model from your max HR or threshold HR.

Find your Zone 2 range for aerobic base training.

Estimate your threshold heart rate from your maximum.

Score a ride's Training Stress from its duration, normalized power and your FTP.

See how hard a ride was relative to your threshold.

Measure how smooth or surgy your pacing was.

Estimate your VO₂ max from your 5-minute maximal power and weight.

Convert a distance and goal time into target pace and speed.

Predict your time at a new distance from a recent race result.

Estimate calories burned on a ride from your average power.