Resting Calorie Burn Rate Calculator
Your Results
*TDEE includes calories burned during daily activities and exercise.
Understanding Your Resting Calorie Burn Rate
Your resting calorie burn rate, often referred to as your Basal Metabolic Rate (BMR), is the number of calories your body requires to perform its most basic life-sustaining functions. Even when you are completely at rest, your body is working hard to circulate blood, breathe, adjust hormones, and repair cells.
How We Calculate Your BMR
This calculator uses the Mifflin-St Jeor Equation, which is currently considered the gold standard for predicting calorie needs in healthy adults. The formula differs slightly between biological males and females:
- For Men: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
- For Women: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
BMR vs. TDEE: What's the Difference?
While BMR tells you what you burn doing absolutely nothing, TDEE (Total Daily Energy Expenditure) is a more realistic look at your calorie needs. It factors in your daily movement and exercise habits. If you want to maintain your current weight, your TDEE is the number of calories you should aim to consume.
Example Calculation
Let's look at a realistic scenario for a 35-year-old female who weighs 70kg and is 165cm tall:
| Metric | Value |
|---|---|
| Basal Metabolic Rate (BMR) | 1,401 Calories/Day |
| TDEE (Moderately Active) | 2,172 Calories/Day |
Factors That Influence Metabolism
Several factors can cause your resting calorie burn to fluctuate:
- Muscle Mass: Muscle is more metabolically active than fat. The more muscle you have, the higher your BMR.
- Genetics: Some individuals naturally have a "faster" metabolism due to biological factors.
- Hormonal Health: Thyroid issues, in particular, can significantly slow down or speed up your resting burn rate.
- Age: BMR typically decreases as you age due to loss of lean muscle tissue.