Enter your sex (as the constant used by the equation), age, weight, and height to get an ESTIMATE of your Resting Energy Expenditure (REE) using the Mifflin–St Jeor predictive equation, with its original published coefficients (9.99 per kg of weight, 6.25 per cm of height, −4.92 per year of age, and +5 or −161 depending on the chosen sex constant). Optionally, choose a conventional activity factor to also get an estimated Total Daily Energy Expenditure (TDEE). This tool is intended for ADULTS aged 19 to 78 (the original study's range) and NEVER calculates a caloric deficit or surplus, never generates macros, never creates a diet plan, never tells you how much to eat, and offers no diagnosis or medical advice. A predictive equation never replaces a real clinical measurement via indirect calorimetry. All calculations happen in your browser; nothing you enter is ever stored or sent to any server.
The published equation uses a different constant depending on the sex recorded in its original model. This is not a question about gender identity.
Fill in the data to calculate an estimate.
These are ROUGH ESTIMATES calculated with the Mifflin–St Jeor predictive equation; this is not a real measurement of your metabolism (only clinical indirect calorimetry provides that) and not medical or dietary advice. The activity factor is a conventional approximation across broad categories and adds further uncertainty. This tool never calculates a caloric deficit or surplus, never generates macros or a diet plan, and never tells you how much to eat. It's intended for adults aged 19 to 78 (the original study's range) and is not designed for minors, pregnancy, breastfeeding, or special clinical situations. No data you enter here is ever stored or sent to any server.
The data is processed on your device and is never sent to the server.