Running Calculators
Free, research-backed tools to optimize your training. Calculate training paces, age-grade your performances, and adjust for heat.
100% FREE • NO SIGNUP REQUIRED
Training Pace Calculator
Enter a race time to get personalized training paces for Easy, Marathon, Threshold, Interval, and Repetition workouts.
Training Pace Calculator
Age-Grading Calculator
Compare performances across ages using World Masters Athletics standards. See your age-graded percentage and equivalent open-age time.
Age-Grading: Calculates your performance as a percentage of the World Record standard for your specific age and gender. This creates a unified 'Level Playing Field' across all demographics. An 80% score at age 60 represents the exact same relative competitiveness as an 80% score at age 25, even though the absolute race times differ.
Heat-Adjusted Pace
Adjust your training paces for temperature and humidity. Maintain true physiological effort in hot conditions.
Compare a reference pace with target temperature and moisture. This estimates equivalent effort; it is not a safety clearance or a readiness score.
Temperature unit
Race Equivalency
Predict your race potential at any distance from an existing result. Based on the Daniels/Gilbert oxygen cost equation.
Boston Qualifying
2026 BAA qualifying standards with training paces for every age group. See what fitness level your BQ standard requires.