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Health · Weight, Energy & Nutrition

Mifflin–St Jeor Resting Energy Calculator

Estimate adult resting energy expenditure from the Mifflin–St Jeor research equation and keep the result separate from total daily energy needs.

Health · Weight, Energy & Nutrition

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Private in-browser calculation · no account or saved health record

Health values stay in this browser tab. They are not added to the URL, analytics, storage, or a cloud record.

Health result

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Quick guide

How to use this calculator

  1. Use the labels and unit notes to enter the requested measurement, date, time, or observation exactly as recorded.
  2. Check the visible method, population, and unit basis before using the result; switch modes rather than converting values mentally.
  3. Read the calculation audit and limitations together. The result supports measurement or tracking and does not replace diagnosis, treatment, or urgent medical assessment.

Calculation method

How the mifflin–st jeor resting energy calculator works

REE = 10×weight(kg) + 6.25×height(cm) − 5×age + s, where s is +5 for the study's male equation and −161 for its female equation.

REE is an equation-based estimate of energy used at rest. It is not measured calorimetry and it is not a calorie prescription, weight-change forecast, or total daily expenditure.

Worked example

Mifflin–St Jeor Resting Energy example

For the male equation at 70 kg, 175 cm, and age 35, estimated REE is 1,623.75 kcal/day.

REE = 10×weight(kg) + 6.25×height(cm) − 5×age + s, where s is +5 for the study's male equation and −161 for its female equation.

Supported inputs

Precision and limits

Supported purpose

The source study derived the equation in healthy adults aged 19–78 using a binary sex variable. Pregnancy, lactation, illness, growth, unusual body composition, and ages outside that derivation population require other methods or professional review.

Measurement quality

The output is only as reliable as the entered measurement, device, timing, units, and applicable reference population. Recheck unexpected values against the original record.

Clinical boundary

This calculator does not diagnose a condition, choose treatment, change medication, or determine that an urgent symptom is safe to monitor at home. Contact an appropriate health professional or local emergency service when the situation may be urgent.

Privacy

Entered health values and results stay in this browser tab. They are not placed in URLs, analytics, logs, local storage, session replay, or a cloud record by this calculator.

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