BMR Calculator (Basal Metabolic Rate)

Estimate resting daily energy expenditure before physical activity multipliers.

Mifflin-St Jeor BMR (Male Baseline)
1,668.75 kcal/day
Mifflin-St Jeor (Female) 1,502.75 kcal/day
Harris-Benedict BMR 1,722.46 kcal/day
Activity-Adjusted TDEE 2,586.56 kcal/day
Inputs
kg
Body weight in kilograms.
cm
Standing height in centimeters.
years
Age in completed years.
× BMR
Physical activity factor (1.2 sedentary to 1.9 athlete).
Results & Graph
Mifflin-St Jeor BMR (Male Baseline)
1,668.75 kcal/day
Mifflin-St Jeor (Female)
1,502.75 kcal/day
Harris-Benedict BMR
1,722.46 kcal/day
Activity-Adjusted TDEE
2,586.56 kcal/day

Mifflin-St Jeor BMR (Male Baseline)

Graph 1 • Weight Kg Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 kcal/day 1.1k kcal/day 2.2k kcal/day 50%: 1,308.75 kcal/day 1.3k 50% 75%: 1,488.75 kcal/day 1.5k 75% 100%: 1,668.75 kcal/day 1.7k 100% 125%: 1,848.75 kcal/day 1.8k 125% 150%: 2,028.75 kcal/day 2.0k 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
Mifflin-St Jeor BMR (Male Baseline) 1,668.75 kcal/day Mifflin-St Jeor (Female) 1,502.75 kcal/day Harris-Benedict BMR 1,722.46 kcal/day Activity-Adjusted TDEE 2,586.56 kcal/day
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
Mifflin-St Jeor BMR (Male Baseline)1,668.75 kcal/dayMifflin-St Jeor (Female)1,502.75 kcal/dayHarris-Benedict BMR1,722.46 kcal/dayActivity-Adjusted TDEE2,586.56 kcal/day
Summary: Resting energy expenditure is 1669 kcal/day (male reference) or 1503 kcal/day (female reference), scaling to 2587 kcal/day with activity.
Summary: Resting energy expenditure is 1669 kcal/day (male reference) or 1503 kcal/day (female reference), scaling to 2587 kcal/day with activity.

Formula & Mathematical Methodology: BMR Reference Equation

BMR = 10 × weightkg + 6.25 × heightcm − 5 × age + 5 (male baseline)
BMR = 10 × weight_kg + 6.25 × height_cm − 5 × age + 5 (male baseline)
  • weightKg: Weight Kg (kg)
  • heightCm: Height Cm (cm)
  • age: Age (years)
  • activityMultiplier: Activity Multiplier (× BMR)

Rounding: Intermediate calculations retain full IEEE-754 floating-point precision; displayed clinical and fitness metrics round to 1 or 2 decimal places.

Worked Example: Benchmark Scenario: BMR

Estimate resting daily energy expenditure before physical activity multipliers.

  1. Enter your current anthropometric, laboratory, or training measurements in the units indicated.
  2. Substitute the values into the reference formula: BMR = 10 × weight_kg + 6.25 × height_cm − 5 × age + 5 (male baseline).
  3. Compare the primary output and supporting thresholds across all three custom SVG charts.
Result: Evaluates BMR using BMR = 10 × weight_kg + 6.25 × height_cm − 5 × age + 5 (male baseline).

Frequently Asked Questions

How is the BMR Calculator (Basal Metabolic Rate) calculated?

It evaluates BMR = 10 × weight_kg + 6.25 × height_cm − 5 × age + 5 (male baseline) using your entered parameters and displays supporting clinical or training thresholds alongside three interactive SVG visualizations.

Can I compare multiple scenarios side by side?

Yes. Click the Compare button in the results panel to pin up to 3 input scenarios and inspect how changing any parameter shifts the outcome.

Are my health or fitness inputs stored on any server?

No. Every calculation executes 100% inside your browser tab so sensitive health and wellness numbers never leave your device.

Health & Fitness • Metabolism & Nutrition Guide

How to Use the BMR Calculator (Basal Metabolic Rate): Practical Guide & Visual Analysis

Calculate Basal Metabolic Rate (BMR) using the Mifflin-St Jeor and Revised Harris-Benedict equations. Adjust the inputs above to view instant numerical outputs, three custom domain-specific SVG graphs, and reference methodology. Whether you are researching bmr calculator (basal metabolic rate), bmr, bmr, metabolism & nutrition calculator, this interactive tool helps you calculate Basal Metabolic Rate (BMR) using the Mifflin-St Jeor and Revised Harris-Benedict equations.

Interpreting the 3 Custom Visual Graphs & Key Outputs

As you adjust Weight Kg, Height Cm, Age, Activity Multiplier, the calculator immediately computes Primary physiological or clinical metric, Supporting reference benchmarks, 3-Panel custom domain SVG visualization and updates all three domain-specific SVG charts in real time. Instead of relying on a single static figure, you can inspect the primary domain diagram, component breakdown, and multi-point trajectory curve to see how changing your inputs shifts the final result. Use the Compare (up to 3 scenarios) button to evaluate side-by-side variations before making a decision.

Real-World Benchmark & Planning Tips (Global Clinical & Exercise Physiology Reference)

In our benchmark scenario (Benchmark Scenario: BMR), Evaluates BMR using BMR = 10 × weight_kg + 6.25 × height_cm − 5 × age + 5 (male baseline). Keep in mind that uses peer-reviewed population equations and standard physiological constants. For related calculations in Health & Fitness, explore BMI Calculator (Body Mass Index), Calorie Needs & TDEE Calculator, Body Fat (US Navy), Lean Body Mass & Body Surface Area Calculator.