Enter your age, height, weight, and activity level to instantly estimate your BMR (calories your body burns at rest) and your daily maintenance calories (TDEE). No signup, no data stored — everything runs in your browser.
Why Use a Calorie Calculator?
- Understand your baseline. Knowing your BMR and TDEE gives you a realistic starting point before making any changes to your diet.
- Set informed goals. The estimated ranges for weight loss or gain give you a general reference point to plan around.
- Pairs with your BMI. Use it alongside our BMI Calculator for a fuller picture of your overall numbers.
- Account for activity level. Unlike basic calculators, this factors in how active you actually are, not just your body stats.
How It Works
This calculator uses the Mifflin-St Jeor equation, one of the most widely used and accurate formulas for estimating Basal Metabolic Rate (BMR) — the number of calories your body burns just to maintain basic functions at rest. That number is then multiplied by an activity factor based on how much you exercise, giving your Total Daily Energy Expenditure (TDEE), or maintenance calories.
Quick Answers
- BMR is the calories your body burns doing nothing — just staying alive.
- TDEE is your BMR plus the calories burned through daily activity and exercise.
- 500 kcal below TDEE is a commonly used general estimate for gradual weight loss.
- 500 kcal above TDEE is a commonly used general estimate for gradual weight gain.
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR is the calories your body needs at complete rest, while TDEE adds in the calories burned through daily movement and exercise, giving a more complete picture of your actual maintenance calories.
How accurate is this calculator?
It uses the Mifflin-St Jeor equation, considered one of the most reliable formulas available, but individual metabolism can vary, so results are best used as a general estimate rather than an exact figure.
Should I eat exactly at my TDEE?
Eating around your TDEE generally maintains your current weight. Adjusting above or below it is typically how people aim to gain or lose weight gradually, though individual needs vary and it is worth discussing significant changes with a healthcare provider.
Does this calculator store any of my information?
No. All calculations happen directly in your browser, and nothing you enter is saved, uploaded, or shared.
