All tools
Split times
Pace charts for the most common goals, from 5K to the marathon. Every target time comes with a full kilometre by kilometre breakdown.
Other useful tools
Pace calculator
Convert pace, time and distance in min/km or min/mi with automatic splits.
Race time predictor
Predict your 5K, 10K, half and full marathon times from a recent race (Riegel).
Heart rate zones
Compute your 5 heart rate zones using the Karvonen (HR reserve) method.
VO₂max estimation
Estimate your VO₂max from a race time (Daniels & Gilbert).
Calories burned
Estimate calories burned from weight, duration and intensity (MET method).