TDEE Calculator
Estimate your total daily energy expenditure, or TDEE, as general maintenance-energy context. This tool does not set a calorie target, diet or weight-loss plan.
Your numbers stay in your browser, nothing is sent or saved.
What TDEE means
Your total daily energy expenditure (TDEE) is an estimate of energy used in a day from resting metabolism and activity. This calculator uses the Mifflin–St Jeor equation for estimated resting energy expenditure, then applies an activity factor. The result is general context, not a measured metabolic test or personal eating prescription.
Using TDEE with a GLP-1
People using GLP-1 medicines can have changing appetite and food tolerance. A formula cannot determine what any one person should eat, and this tool should not be used to set a deficit or medication plan. For general food ideas, see the protein food tool and our guide on what to eat on a GLP-1.
Frequently asked questions
What is TDEE?
TDEE is an estimate of energy used per day from resting metabolism and activity. It is general context, not a personal prescription.
How is TDEE calculated?
It uses the Mifflin–St Jeor equation for resting metabolism, times an activity factor (1.2–1.9). It's an estimate, not a lab measurement.
Can TDEE set my personal calorie goal?
No. A general formula cannot safely set a personal calorie target. Ask a qualified clinician or registered dietitian for personal guidance.
Is the TDEE number exact?
No. Real energy needs vary with body composition, health, medicines, activity and other factors. Treat the result as general context.