Performance calculators
9 calculators Heart Rate Calculator Calculate personalized heart rate zones using Karvonen, Tanaka, Gulati (women) or HUNT formulas. Get full zone ranges, fitness classification, and RPE guidance.
Open Max Heart Rate Calculator Calculate your max heart rate with 5 validated formulas. Add your resting HR to unlock Karvonen training zones personalized to your heart rate reserve.
Open Target Heart Rate Calculator Calculate all 5 heart-rate training zones from your age and resting heart rate. Choose Karvonen, Tanaka, or Nes formula and see every zone in beats per minute.
Open Anaerobic Threshold Calculator Calculate your anaerobic threshold heart rate (LTHR) from age or a field test. Get 5 personalized training zones using the Karvonen or max-HR method.
Open Bruce Protocol METs Calculator Calculate METs and VO2 max from your Bruce Protocol treadmill test. Get your fitness classification with age- and sex-adjusted norms, stage breakdown, and cardiac context.
Open ERG Calculator Convert rowing split times to watts, calculate total time or distance on the erg, and see performance benchmarks by level. Metric and imperial, Concept2 formula.
Open Heart Rate Recovery Calculator Calculate your 1-minute and 2-minute heart rate recovery (HRR) after exercise. See your cardiovascular fitness rating, clinical cut-offs, and what your score means.
Open Heart Rate Zone Calculator: 5 Training Zones by Age and Resting HR Calculate your 5 heart rate training zones in bpm using the simple max-HR method or the Karvonen formula. Enter age and resting heart rate for instant results.
Open MET Minutes Calculator Calculate your weekly MET-minutes from any activity. See if you meet the WHO 600 MET-min recommendation, estimate calories burned, and check your intensity band.
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