Free tools — no signup needed
Get your exact 5K and 10K finish times from pace or a known race time
Calculate calories burned running by weight, distance and intensity
Calculate personalized training heart rate zones
Calculate MHR using Tanaka, 220−Age, Gellish, and Fox formulas
Convert min/km to km/h and back — with race finish times
Predict race times based on recent performance
Calculate your running pace, speed, and split times
Estimate your VO₂ max using Cooper, Rockport, beep test, or resting heart rate
For running there are 8 calculators (5K / 10K Finish Time Calculator, Calories Burned Running, Heart Rate Zone Calculator, Max Heart Rate Calculator, Pace ↔ Speed Converter, Race Time Predictor and 2 more) and 3 planners (5K / 10K Training Plan, Marathon Training Plan Calculator and Training Load Calculator). All are free and need no signup.
Open any tool to use it, with a short explanation of how it works and answers to common questions.
