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BMR Calculator

Calculate your Basal Metabolic Rate — the calories your body burns at rest to maintain basic life functions.

Our free BMR Calculator lets you calculate your Basal Metabolic Rate — the calories your body burns at rest to maintain basic life functions. It is built for individuals tracking fitness, nutrition, and wellness goals who need fast, reliable results without installing software or creating an account.

BMR Calculator runs entirely in your browser on CalculatorsPlus — enter your values, get instant results, and copy or share your output in one click. Your data never leaves your device; we do not store inputs on any server.

Wellness metrics like those from the bmr calculator are most useful when tracked over weeks and months. Record your results, note lifestyle changes, and discuss trends with a qualified health professional when making significant diet or training decisions.

Results update in real time as you change inputs, so you can explore "what if" scenarios — adjust one variable at a time to see how it affects the outcome before committing to a purchase, plan, or decision.

This page includes step-by-step instructions, frequently asked questions, and practical tips below the calculator. Bookmark it for repeat use — many health tasks come up weekly during projects, studies, or financial planning.

Common Uses

  • ✓Set a baseline with the bmr calculator and track progress over time
  • ✓Prepare informed questions for doctors, trainers, or nutritionists
  • ✓Compare estimates across different activity levels or inputs
  • ✓Quick checks during meal planning, workouts, or pregnancy tracking

How to Use the BMR Calculator

  1. 1

    Enter age and gender

    Input your age and select your gender.

  2. 2

    Enter weight and height

    Input your weight (kg/lbs) and height (cm/ft).

  3. 3

    View BMR result

    See your estimated basal metabolic rate in calories per day.

💡 Tips & Tricks

  • •Never eat below your BMR for extended periods — it can slow your metabolism.
  • •BMR decreases with age; adjust calorie intake as you get older.
  • •Strength training helps maintain BMR by preserving lean muscle mass.

Frequently Asked Questions

What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs at complete rest to maintain vital functions: breathing, circulation, cell production, and temperature regulation.
What formula is used for BMR?
The Mifflin-St Jeor equation is most accurate: Men: 10×weight(kg) + 6.25×height(cm) – 5×age – 5. Women: 10×weight(kg) + 6.25×height(cm) – 5×age – 161.
How is BMR different from TDEE?
BMR is calories burned at rest only. TDEE (Total Daily Energy Expenditure) = BMR × Activity Factor. TDEE includes exercise, walking, digestion, and daily movement.
Can I increase my BMR?
Yes — building muscle mass increases BMR since muscle tissue burns more calories at rest than fat tissue. Resistance training is the most effective way to raise BMR.

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