RMR & TDEE Calculator | Calories & Macros
The i-Thrive RMR-TDEE-Calculator is designed to help you better understand your metabolism, daily calorie requirements, and nutritional needs using a more evidence-based approach than generic online calorie calculators.
Your Resting Metabolic Rate (RMR) represents the number of calories your body requires each day to support essential functions such as breathing, circulation, recovery, and cellular function. Your Total Daily Energy Expenditure (TDEE) builds on this by estimating how many calories you burn through movement, exercise, and daily activity.
Using the i-Thrive RMR-TDEE-Calculator, you can estimate:
Resting Metabolic Rate (RMR)
Total Daily Energy Expenditure (TDEE)
Daily Calorie Requirements
Weight Loss Calorie Targets
Walking & Exercise Requirements
Macro Nutrient Requirements
Unlike many standard online calculators, the i-Thrive RMR-TDEE-Calculator also allows you to improve accuracy using Fat Free Mass from a DEXA Body Composition Scan or results from a directly measured Resting Metabolic Rate test.
This calculator can be useful for individuals looking to improve metabolic health, support healthy weight loss, optimise sports performance, enhance body composition, or better understand their energy requirements for healthy aging and longevity.
At i-Thrive in Surrey, we combine metabolic testing, physiology, nutrition, body composition analysis, and coaching to help translate data into practical lifestyle strategies. The calculator is designed as an educational starting point to help you better understand your own metabolism and daily energy needs.
Calculate your Resting Metabolic Rate (RMR)
Calculate your Total Daily Energy Expenditure (TDEE)
Daily activity (not planned exercise).
| Component | Description | Daily Expenditure (kcal) |
|---|---|---|
| RMR | Resting Metabolic Rate | |
| NEAT | Daily movement & steps | |
| EAT | Planned aerobic exercise | |
| TEF | Thermic effect of food (~10%) | |
| TDEE | Total Daily Energy Expenditure |