BMR Calculator

BMR Calculator helps you estimate basal metabolic rate from age, sex, height, and weight. Use this free browser-based calculator from XTRAW Tools to compare inputs, estimate results, and plan your next step.

How to Use the BMR Calculator

1. Enter the required calculator inputs shown in the form.
2. Review the measurement, date, time, activity, body, nutrition, or training assumptions.
3. Run the calculator, then adjust one input at a time to compare scenarios.

What This Calculator Helps With

Estimate basal metabolic rate from age, sex, height, and weight. It is designed for fitness users, wellness planners, nutrition trackers, and people estimating daily calorie needs who want a fast, browser-based estimate before relying on a doctor, dietitian, trainer, coach, pregnancy care provider, public safety source, or other professional source.

• Sex: Male
• Age: 35
• Height: 5 ft 10 in
• Weight: 180 lb

Common Uses

People use this calculator when they need a quick way to estimate health, wellness, fitness, nutrition, timing, body composition, or training values from simple inputs.

• Health Estimate: Create a quick wellness, fitness, nutrition, pregnancy, or body-measurement estimate from entered values.
• Measurement: Use body, time, distance, nutrition, or training measurements to calculate a clear numeric result.

Formula or Method

Mifflin-St Jeor: BMR = 10W + 6.25H - 5A + S, where S is +5 for male and -161 for female.

Example

Example inputs: Sex: Male; Age: 35; Height: 5 ft 10 in; Weight: 180 lb

Example result: Using the default inputs, estimated BMR is about 1,758 calories per day.

Related Tools

• TDEE Calculator
• Calorie Calculator
• Macro Calculator
• Protein Calculator
• Body Fat Calculator
• Ideal Weight Calculator

BMR Calculator FAQ

Is the BMR Calculator free?

Yes. This calculator is free to use on XTRAW Tools.

Do I need to create an account?

No. XTRAW tools are designed for browser-based use without requiring an account.

Are the results exact?

Results may be estimates depending on the inputs, formula, and purpose of the calculator. Always verify important results before relying on them.

Disclaimer: This calculator is provided for general informational and convenience purposes only. It is not legal, financial, medical, tax, investment, insurance, accounting, pregnancy, health, fitness, nutrition, safety, or professional advice. Always verify important results with a qualified professional or authoritative source before making decisions.