Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like Mifflin-St Jeor & Katch-McArdle BMR / TDEE Calculator frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the Mifflin-St Jeor & Katch-McArdle BMR / TDEE Calculator?
The Mifflin-St Jeor & Katch-McArdle BMR / TDEE Calculator is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in nutrition practice. Implements the Academy of Nutrition and Dietetics gold-standard Mifflin-St Jeor and body-fat-adjusted Katch-McArdle formulas to determine basal caloric requirements, activity-factored TDEE, and target caloric deficits/surpluses. Clinical scoring tools like Mifflin-St Jeor & Katch-McArdle BMR / TDEE Calculator are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).
💡Clinical Pearls & Diagnostic Utility
Provides the most reliable non-calorimetric estimate of resting energy expenditure for outpatient bariatrics, clinical dietetics, and sports physiology.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate Mifflin-St Jeor & Katch-McArdle BMR / TDEE Calculator:
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 1500 | Low Energy Requirement (< 1500 kcal/day) | blue |
| 1501 – 2500 | Standard Adult Energy Expenditure (1500 - 2500 kcal/day) | green |
| 2501 – 3200 | High Energy Expenditure (2500 - 3200 kcal/day) | yellow |
| ≥ 3201 | Very High / Elite Athletic Expenditure (> 3200 kcal/day) | red |
When to Exercise Caution
In critically ill ICU patients with sepsis, burns, or severe trauma, indirect calorimetry or ESPEN stress factors are preferred over standard resting formulas.
Clinical Review Board
Dr. Muhammad Nouman, MBBS
Capital Medical University | PMDC Reg No: 117744-P
Clinical Audit Status
✓ Verified for 2026 Guidelines
Last updated: 2026-08-08
Peer-Reviewed Medical Literature
- •Mifflin MD, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990;51(2):241-247.
- •Frankenfield D, et al. Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review. J Am Diet Assoc. 2005;105(5):775-789.
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