Sports calculators that just work

Pace Calculator

Enter any two of distance, time, and pace — get the third instantly, plus per-km and per-mile splits.

Race Time Predictor

Enter a recent race result and target distance to estimate your finish time using the proven Riegel formula.

One Rep Max Calculator

Estimate your one-rep max from a weight you can lift for multiple reps, and get a full percentage training chart.

TDEE Calculator

Calculate the calories you burn per day (your TDEE) to set targets for cutting, maintaining, or bulking.

BMI Calculator

Calculate your Body Mass Index and see which WHO weight category it falls into.

FTP Calculator

Estimate your Functional Threshold Power from a 20-minute test and get your full set of power training zones.

VO2 Max Calculator

Estimate your VO2 max from a race distance and time using the Daniels–Gilbert model.

Macro Calculator

Turn your calorie target into daily protein, carbohydrate, and fat goals based on your objective.