Estimate maximum heart rate and common target exercise zones from age for general fitness reference.
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BMI, BMR, calorie needs, body measurements and heart-rate estimates for general reference.
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For age 40, estimated maximum is 180 bpm; 50% to 85% is about 90 to 153 bpm.
Estimate exercise heart-rate zones from age using a simple percentage of estimated maximum heart rate. It is designed for quick estimates and everyday problem solving. When a calculation affects a contract, tax filing, medical decision or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
For age 40, the simple 220-minus-age estimate gives 180 beats per minute maximum; 50%–85% yields about 90–153 bpm.
These zones are illustrative percentages of an estimated maximum heart rate.
Medications, fitness, cardiac conditions and individual variation can change safe or appropriate activity targets.
Related tools: BMI Calculator · BMR Calculator
Estimate exercise heart-rate zones from age using a simple percentage of estimated maximum heart rate.
Estimated max heart rate = 220 − age. Target range = max heart rate × selected percentages.
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A common simple estimate uses 220 − age for maximum heart rate, then multiplies that estimate by a percentage to create a target zone. Individual responses vary, so this is only a general reference.
For exercise planning, consider fitness level, medications and clinician guidance rather than relying on an age formula alone.
See how formulas, sources and limitations are handled across ERICH Calculators.