BMR Calculator

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, cell production, and nutrient processing — all while at complete rest. It represents about 60-75% of daily calorie expenditure for most people. Knowing your BMR is the foundation of any weight management plan: whether you aim to lose, gain, or maintain weight, BMR tells you the baseline.

This BMR calculator uses the Mifflin-St Jeor equation, widely recognized as the most accurate and validated formula. For men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5. For women: BMR = (10 × weight) + (6.25 × height) - (5 × age) - 161. It's simple, fast, and evidence-based. The tool also gives you a glance at Total Daily Energy Expenditure (TDEE) by multiplying your BMR by an activity factor (here we show sedentary and light exercise estimates to guide you).

Why choose our MultiCalculators BMR tool? It's completely private: no data storage, no signup, no hidden tracking. The interface is clean, responsive, and accessible on all devices. You get instant results with clear, bold numbers. And we don't clutter your screen with ads or irrelevant content. Just pure utility. Our algorithm rounds to the nearest whole calorie; medical experts suggest using BMR as a starting point and adjusting based on real-world feedback.

Important: BMR is not the same as resting metabolic rate (RMR), though they are close. This tool is intended for healthy adults (18+). Extremes of muscle mass, pregnancy, illness, or metabolic conditions may alter accuracy. Always consult a registered dietitian or physician before making drastic calorie changes. The values are estimates, not prescriptions.

We designed this page with SEO best practices, high contrast, and fast load times. MultiCalculators offers many other health tools: BMI, body fat, calorie intake, and macro ratios. All free, all reliable. Bookmark this page for quick daily reference. We continuously update our formulas. Thank you for trusting us — we're glad to support your wellness journey. For feedback, visit our Contact page. Now, calculate your BMR and take the guesswork out of nutrition.