TDEE Calculator
Verified Calculation Engine
The online TDEE Calculator helps you calculate instantly and solve problems related to Metabolism. This tool provides accurate results using standard formulas and step-by-step calculation; you can view the formula with example in the calculator where available. Whether you are a student, teacher, or professional, this calculator simplifies complex calculations and saves time. Enter the required values below and get instant results. Results are shown clearly, with optional step-by-step explanation where applicable. The tool is free to use and works in any modern browser—no download or installation required. Bookmark this page for quick access whenever you need reliable Health Fitness calculations.
Calculate Total Daily Energy Expenditure (calories needed per day)
TDEE = BMR × Activity Multiplier
TDEE is BMR multiplied by activity level factor
Inputs
Results
Worked Examples
Example 1: Sedentary
Calculate TDEE for BMR 1500 cal/day, sedentary activity
- bmr: 1500
- activityLevel: sedentary
- tdee: 1800
Example 2: Active
Calculate TDEE for BMR 1800 cal/day, active lifestyle
- bmr: 1800
- activityLevel: active
- tdee: 3105
About this calculator
Overview
This TDEE calculator estimates total daily energy expenditure by combining a BMR estimate with an activity multiplier.
When to use
Use it for rough daily calorie-need planning after you already have weight, height, age, sex, and activity level.
Inputs explained
- BMR (Basal Metabolic Rate) (cal/day) [required]
- Activity Level [required]: Daily activity level
Formula / method
Estimate BMR (commonly Mifflin–St Jeor), then TDEE = BMR × activity factor for the selected lifestyle level.
Worked example
Example: Calculate TDEE for BMR 1500 cal/day, sedentary activity (inputs bmr = 1500, activityLevel = sedentary; outputs tdee = 1800).
Interpreting results
TDEE is a maintenance estimate under the chosen activity label. Aggressive deficits/surpluses should be reviewed with a clinician or dietitian.
Assumptions
- Activity multipliers match the labels shown on the form.
- BMR equation coefficients match this calculator’s implementation.
Limitations
- Does not model medical conditions, adaptive thermogenesis, or sports periodization.
- Not individualized clinical nutrition advice.
Important note
Informational and educational only. Not medical advice, diagnosis, or a substitute for clinical care. Consult a qualified clinician for health decisions.
How to Use This Calculator
- Enter the required values in the input fields.
- Click the Calculate button.
- View the computed result instantly.
Formula Used
Estimate BMR (commonly Mifflin–St Jeor), then TDEE = BMR × activity factor for the selected lifestyle level.
Example Calculation
Example: Calculate TDEE for BMR 1500 cal/day, sedentary activity (inputs bmr = 1500, activityLevel = sedentary; outputs tdee = 1800).
Frequently Asked Questions
What is TDEE Calculator?
- This TDEE calculator estimates total daily energy expenditure by combining a BMR estimate with an activity multiplier.
How does TDEE Calculator work?
- Estimate BMR (commonly Mifflin–St Jeor), then TDEE = BMR × activity factor for the selected lifestyle level.
Why use this Health Fitness calculator?
- Use it for rough daily calorie-need planning after you already have weight, height, age, sex, and activity level.