Health Calculators

BMR Calculator

Use this calculator to estimate basal metabolic rate, the approximate energy your body uses at rest.

Enter the weight using the unit shown in the label.

Enter the height using the unit shown in the label.

Enter the person’s age for this calculation.

Used only for the BMR formula constant. Male uses +5 and female uses −161 in this calculator.

Controls rounding in the displayed result only; it does not change the underlying calculation.

Result
Enter values to begin

Formula

BMR = 10 × weight + 6.25 × height − 5 × age + sex adjustment

Worked example

An 80 kg, 180 cm, 35-year-old male has an estimated BMR of about 1,778 calories per day.

How to use this calculator

Start with realistic inputs, run more than one scenario, and compare the result with nearby calculators in the same topic cluster. This makes the page useful for both a quick answer and a deeper planning workflow.

For important financial, health, construction or employment decisions, treat the output as a planning estimate rather than a final professional assessment.

Accuracy note

CalculatorWorks explains formulas and assumptions so results are easier to review. Inputs, rounding, local rules, fees and personal circumstances can change real outcomes.