TDEE Calculator - Estimate Daily Calorie Needs
Total daily energy expenditure (TDEE) estimates how much energy your body uses over a day. It combines resting energy needs with an activity estimate rather than measuring metabolism directly.
STEP-BY-STEP GUIDE
How do I use the tdee calculator?
Enter age, height, weight and the requested calculation inputs, then choose an activity level that reasonably reflects your routine. Read the basal metabolic rate estimate and the activity-adjusted TDEE together.
Use the tool as described above, then check the result against its limitations before using it elsewhere. Copy, export and print actions differ by tool. Do not assume a browser-saved value is a secure backup.
PRACTICAL APPLICATIONS
When is this tool useful?
TDEE can provide a starting estimate for nutrition planning or understanding why energy needs vary between relatively inactive and highly active daily schedules.
Choose inputs that describe the actual task. If you are comparing results over time, keep the method, units and settings consistent.
EXPLORE THE DETAILS
A closer look at TDEE Calculator
What is total daily energy expenditure?
TDEE estimates the calories a person uses over an entire day. It includes resting metabolism plus energy spent on movement, exercise and digesting food. The basal metabolic rate, or BMR, estimates energy needs at rest; multiplying BMR by an activity factor provides a rough TDEE estimate.
Which equation is used here?
The current adult calculator uses the Mifflin-St Jeor equation with metric height and weight inputs. BMR is estimated from weight in kilograms, height in centimeters, age in years and a sex-specific constant, then multiplied by the chosen activity factor. The result is expressed in kilocalories per day.
How accurately does the activity multiplier describe your life?
Activity categories are broad averages rather than measurements. Two people with the same age, height and weight can expend different amounts of energy due to movement, body composition, health, work and other factors. This tool is not a diagnosis or a substitute for a registered dietitian or medical professional.
Example
If a hypothetical adult’s BMR is 1,500 kcal/day and the chosen activity multiplier is 1.55, the estimated TDEE is 2,325 kcal/day. That number is a starting estimate, not a promised maintenance intake.
ACCURACY & PRIVACY
Important details and limitations
The equation gives a population-based approximation, not an individual diagnosis or prescribed diet. Activity multipliers are broad assumptions; pregnancy, illness, growth and other situations require individualized guidance.
Some ToolsRoom utilities keep progress in local browser storage. That is convenient for repeat visits on the same device, but it is not an online account or a backup. Clearing browser data, changing devices or using private browsing can remove saved information. Export important results when supported.
FREQUENTLY ASKED QUESTIONS
Questions about TDEE Calculator
What is the difference between BMR and TDEE?
BMR estimates resting energy use; TDEE also includes an activity-related allowance.
Is the estimate exact?
No. Real-world needs can differ substantially from calculator predictions.
What does kcal per day mean?
It is an estimated amount of food energy used over one day, expressed in kilocalories.
Is BMR the same as daily calorie maintenance?
No. BMR is resting metabolism; TDEE adds an approximation for activity and other expenditure.
Is this for children or pregnancy?
No. The current input ranges and equation are oriented toward general adult estimates; individual medical advice may be needed.
Is this free online tool available on mobile?
Yes. ToolsRoom is designed for modern mobile and desktop browsers, though some output options depend on your device and browser features.
Explore related tools
Browse all calculators tools or visit the ToolsRoom homepage.