# Extended BMR Calculator (Mifflin / Schofield Multi-Formula Comparison) Compare Mifflin-St Jeor, original and revised Harris-Benedict, Schofield (FAO/WHO/UNU), and Katch-McArdle BMR equations side by side with mean and spread in kcal/day. Not medical advice. > Canonical page: https://elysiatools.com/en/tools/basal-metabolic-rate-ext - **Category:** Health - **Keywords:** bmr, basal metabolic rate, mifflin st jeor, harris benedict, schofield equation, katch mcardle, calorie calculator, resting energy expenditure, metabolism, nutrition, energy expenditure ## Overview Compare Mifflin-St Jeor, original and revised Harris-Benedict, Schofield (FAO/WHO/UNU), and Katch-McArdle BMR equations side by side with mean and spread in kcal/day. Not medical advice. ## Inputs - **Sex** (select): Sex used by the sex-specific equations. - **Weight (kg)** (number): Body weight in kilograms. - **Height (cm)** (number): Height in centimeters. - **Age (years)** (number): Age in years (18–100). - **Lean Body Mass (kg, optional)** (number): Optional lean body mass in kg; enables the Katch-McArdle formula (370 + 21.6×LBM). - **Decimal Places** (number) ## When to use - Use it when you need to extract numeric data content quickly in the browser. - Helpful for health workflows that need repeatable inputs and fast results. - Useful when you want to test input and output behavior before integrating the workflow elsewhere. ## How it works - Provide Sex, Weight (kg), Height (cm), Age (years) as input to the tool. - The tool processes the request and returns a json result. - For repeatable workflows, use the API endpoint shown on the page after validating the result interactively. ## Use cases - Extract numeric data data during debugging or QA. - Validate expected output before using the API or automation flows. - Compare small variations of input to understand output differences quickly. ## Frequently asked questions ### What does Extended BMR Calculator (Mifflin / Schofield Multi-Formula Comparison) do? Extended BMR Calculator (Mifflin / Schofield Multi-Formula Comparison) helps you extract numeric data content online without setting up a separate local script or app. ### When should I use this tool? Use it when you need a quick extract workflow, want to verify output, or need a browser-based utility for health tasks. ### Can I try this tool with sample data? Yes. Try short representative inputs first, then move to larger or more complex cases once the output looks correct. ### What inputs does Extended BMR Calculator (Mifflin / Schofield Multi-Formula Comparison) accept? Extended BMR Calculator (Mifflin / Schofield Multi-Formula Comparison) accepts Sex, Weight (kg), Height (cm), Age (years). ### Is there an API for Extended BMR Calculator (Mifflin / Schofield Multi-Formula Comparison)? Yes. 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