Heart Rate & Zones Calculators
Personalized zone calculators for training by heart rate, power, or pace.
Anaerobic Threshold Calculator
Anaerobic threshold (AT) estimation: ~85% of max HR, or pace at which conversation becomes difficult.
Try CalculatorBruce Protocol Calculator
Bruce Protocol treadmill test for VO2max estimation.
Try CalculatorCycling HR Zones Calculator
Cycling heart rate zones based on LTHR (Lactate Threshold Heart Rate).
Try CalculatorCycling Power Zones Calculator
Power-based training zones from FTP.
Try CalculatorFat Burning Zone Calculator
Fat burning zone: 60-70% of max HR.
Try CalculatorHeart Rate Recovery Calculator
HR Recovery: drop from peak to 1-min post-exercise.
Try CalculatorKarvonen Heart Rate Calculator
Karvonen formula: THR = ((HRmax - HRrest) x %Intensity) + HRrest.
Try CalculatorLTHR Estimator
Lactate threshold HR from 30-min time trial: LTHR = avg HR of last 20 minutes.
Try CalculatorMarathon HR Pacer
Target heart rate zones for marathon pacing.
Try CalculatorMax Heart Rate Calculator
Max HR formulas: 220-age (Fox), 208-0.
Try CalculatorPregnancy Heart Rate Zones
Safe exercise HR zones during pregnancy.
Try CalculatorResting Heart Rate Assessment
Resting HR fitness norms.
Try CalculatorSwimming Training Zones
Swimming zones based on CSS (Critical Swim Speed).
Try CalculatorTarget Heart Rate Calculator
Target HR using Karvonen formula: THR = RestHR + (MaxHR - RestHR) x Intensity%.
Try CalculatorTraining Pace Calculator
Training pace zones based on VDOT methodology.
Try CalculatorTriathlon HR Zones
Multi-sport HR zones for triathlon.
Try CalculatorZone 2 Cycling Calculator
Zone 2 training for cycling: 55-75% FTP or 60-70% HRmax.
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