Calculators

Free with a Training Plans accountCalculate

Athens Marathon Split Calculator

Plan your splits for the Athens Marathon.

Race Pace Calculator

Calculate your pace or finish time.

Pace Conversion Calculator

Convert pace and speed into the units you use.

Pace Chart Calculator

See times for different distances at the same pace.

Race Predictor

Estimate race times from a recent performance.

Split Calculator

Plan your splits with an even pace or a negative split.

Triathlon

Triathlon Finish Time Planner

Calculate your total triathlon time.

Running · Cycling · Swimming · Triathlon

Race Fueling Calculator

Calculate your total carbohydrate intake for the race.

GAP Calculator

See how gradient affects pace at the same effort.

Wind Pace Calculator

Estimate how wind affects your pace.

Track Wind Calculator

Estimate how wind affects your track splits.

Heat-Adjusted Pace Calculator

Estimate how heat and humidity affect your pace.

Swimming

Swim Pace Calculator

Calculate your swimming pace or time.

Threshold & CV Pace Calculator

Estimate Threshold and CV pace from a performance.

Running Pace Zones Calculator

Find your pace zones based on your threshold pace.

Critical Power Calculator

Estimate Critical Power and W′ from maximal cycling efforts.

Cycling VO₂max Calculator

Estimate your VO₂max from a maximal five-minute effort.

Cycling Power Zones Calculator

Find your power zones based on your FTP.

Running · Cycling

Heart Rate Zones Calculator

Find your heart-rate zones for running and cycling.

Race Gearing Calculator

Compare chainrings and cassettes for your speeds and cadence.

Tire Pressure Calculator

Estimate tyre pressure for your bike and route.

Swimming

Critical Swim Speed Calculator

Calculate your CSS from two maximal pool efforts.

Swimming

Swim Course Converter

Estimate your equivalent pace in pools of different lengths.