Adult BMI
Calculate adult body mass index from height and weight. Enter centimetres and kilograms rather than metres or pounds.
Understand the numbers · Make life easier
Estimated exercise heart-rate range
Estimate a heart-rate interval from age and measured resting heart rate. Intensity here is a percentage of heart-rate reserve, not maximum heart rate.
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Lower end of target range
120beats/min
Heart-rate-reserve percent is not maximum-heart-rate percent. Results are estimates, not exercise prescriptions when taking medication or living with disease.
Upper end of target range144 beats/min
Age-estimated maximum heart rate180 beats/min
Age-estimated maximum heart rate = 208 − 0.7 × age. Target = resting heart rate + percentage × (estimated maximum − resting heart rate). At age 40, resting 60 and 50–70%, this is 120–144 beats/min. Educational estimate for healthy adults only; individual error may be large. Medication, cardiovascular disease or symptoms require medical assessment first. This is not a personal training prescription.
Method and scope
Estimated maximum is 208 minus 0.7 times age. Reserve is that estimate minus resting rate; target is resting rate plus the chosen fraction of reserve.
The upper intensity must not be below the lower intensity. Enter a resting measurement rather than your exercise pulse in the resting field.
This is educational estimation for healthy adults with potentially large individual error. Symptoms, cardiovascular disease or relevant medication require medical assessment; this is not a personal training prescription.
References:Tanaka et al.: original study on age-predicted maximum heart rate in adults
What this helps you do
Estimate a heart-rate interval from age and measured resting heart rate. Intensity here is a percentage of heart-rate reserve, not maximum heart rate.
What to enter
Start with adult age (years), then fill the other relevant fields in the units shown. The field hints explain the required format and examples.
How the calculation works
Estimated maximum is 208 minus 0.7 times age. Reserve is that estimate minus resting rate; target is resting rate plus the chosen fraction of reserve.
Worked example
At age 40 and resting rate 60, estimated maximum is 180 beats/min. A 50-70% reserve range gives 120-144 beats/min.
Understanding the answer
The upper intensity must not be below the lower intensity. Enter a resting measurement rather than your exercise pulse in the resting field.
Scope and limitations
This is educational estimation for healthy adults with potentially large individual error. Symptoms, cardiovascular disease or relevant medication require medical assessment; this is not a personal training prescription.