Heart & Cardio
3 free calculators & converters. Every tool runs entirely in your browser — nothing you type is uploaded.
Available calculators
Heart Rate Zones Calculator
Free heart rate zones calculator using the Karvonen method. Enter your age and resting heart rate to find your fat burn, cardio, and peak training zones.
Target Heart Rate Calculator
Calculate your target heart rate for different exercise intensities. Enter your age and optional resting heart rate to find ideal cardio workout zones.
Mean Arterial Pressure (MAP) Calculator
Calculate mean arterial pressure (MAP) and pulse pressure from systolic and diastolic BP. Includes normal ranges and clinical relevance notes.