Free sports tools
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
Generate a week-by-week training plan for 5K or 10K races
Find out when to start training based on your race date and experience level
Track weekly training load, ATL, CTL and TSB to avoid overtraining
