B Biology & Medicine Tool

Basal Metabolic Rate

Estimate resting energy expenditure with the Mifflin–St Jeor equation. This page combines the live calculator with the underlying formula or method, a worked example and practical study notes.

Study Tools / Biology & Medicine / Basal Metabolic Rate
Clinical note: Estimated resting energy expenditure varies with equation choice and individual physiology. The result is an estimate for educational/reference use, not a direct metabolic measurement.
Clinical calculator
Calculate Basal Metabolic Rate

What Is the Basal Metabolic Rate?

Estimate resting energy expenditure with the Mifflin–St Jeor equation. The calculator is paired with the governing relationship so the numerical output stays connected to the concept you are studying.

Use this page to check worked examples, compare different inputs, and keep the meaning of each variable visible while practising.

Formula or Method

Formula / method
Mifflin–St Jeor: BMR = 10W + 6.25H − 5A + s

Estimate resting energy expenditure from weight W in kg, height H in cm, age A in years, and the sex-specific constant s used by the equation. Keep units and conventions consistent with the problem statement and with the options shown in the calculator.

How to Use the Calculator

  1. Read the input labels and enter the values requested by the problem or exercise.
  2. Check units, signs, angle mode, population/sample options, or other settings before calculating.
  3. Compare the result with the displayed formula or method and the worked example below.

Worked Example

Example: For a 20-year-old, 60 kg, 165 cm female, BMR≈1345 kcal/day.

Common Mistakes

Why It Matters for Students

The Basal Metabolic Rate is useful when a physiology or molecular/quantitative relationship needs a fast numerical check. Keep the input definitions and units visible while studying so the calculation remains tied to the underlying concept.

Estimated resting energy expenditure varies with equation choice and individual physiology. The result is an estimate for educational/reference use, not a direct metabolic measurement.

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These pages are part of the same Study Tools system. For the complete collection, open the 2,420-tool NexaMed Study Tools hub.

Frequently Asked Questions

What is the basal metabolic rate used for?
The Basal Metabolic Rate applies the relationship shown on this page to the inputs you provide. It is intended as a practical study and reference tool. The page is designed for educational/reference use and shows the assumptions behind the calculation.
What formula does the basal metabolic rate use?
Estimate resting energy expenditure from weight W in kg, height H in cm, age A in years, and the sex-specific constant s used by the equation.
How do I use the basal metabolic rate?
Enter the requested values, check the units or options, and calculate. Then compare the result with the formula, worked example and notes on the page. The page is designed for educational/reference use and shows the assumptions behind the calculation.
Calculation source: This page uses the NexaMed Prep Study Tools engine and the same tool definition used by the main interactive hub. Formula descriptions are presented for educational reference; follow the conventions, units and assumptions required by your course, textbook or examination.