BMR & Daily Calorie Calculator
Calculate your Basal Metabolic Rate and caloric needs for weight loss.
Male
Female
Sedentary (Little or no exercise)
Lightly Active (Exercise 1-3 days/week)
Moderately Active (Exercise 3-5 days/week)
Very Active (Exercise 6-7 days/week)
Super Active (Physical job or 2x training)
Maintain Weight
Mild Weight Loss (-0.5 lb / 0.25 kg per week)
Normal Weight Loss (-1 lb / 0.5 kg per week)
Extreme Weight Loss (-2 lb / 1 kg per week)
Mild Weight Gain (+0.5 lb / 0.25 kg per week)
Normal Weight Gain (+1 lb / 0.5 kg per week)
Basal Metabolic Rate (BMR):
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Total Daily Energy Expenditure (TDEE):
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Daily Calorie Target:
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Understanding the Basal Metabolic Rate Weight Loss Calculator
Achieving your ideal weight requires a balance of science and consistency. This Basal Metabolic Rate Weight Loss Calculator is designed to help you understand the physics of your body's energy consumption. By determining your BMR and adjusting for your activity level, you can calculate the precise number of calories needed to lose, gain, or maintain weight.
What is BMR (Basal Metabolic Rate)?
Your BMR represents the number of calories your body burns while at complete rest. Even when you are sleeping, your body requires energy for basic life-sustaining functions such as:
- Breathing
- Circulating blood
- Controlling body temperature
- Cell growth and repair
- Brain and nerve function
BMR accounts for approximately 60% to 75% of your total daily calorie expenditure (TDEE). Knowing this number is the foundation of any successful nutrition plan.
How the Calculation Works
This calculator uses the Mifflin-St Jeor Equation, widely considered the most accurate formula for estimating BMR in clinical settings.
The Formulas
The math varies slightly based on gender due to differences in lean body mass:
- Men: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
- Women: (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
From BMR to TDEE
While BMR tells you what you burn at rest, you don't stay in bed all day. To find your maintenance calories (TDEE), we multiply your BMR by an activity factor:
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.2 | Desk job, little to no exercise. |
| Lightly Active | 1.375 | Light exercise or sports 1-3 days/week. |
| Moderately Active | 1.55 | Moderate exercise or sports 3-5 days/week. |
| Very Active | 1.725 | Hard exercise 6-7 days/week. |
| Super Active | 1.9 | Very hard exercise, physical job, or 2x training. |
Creating a Weight Loss Plan
To lose weight, you must create a calorie deficit. This implies consuming fewer calories than your TDEE.
- 1 lb of body fat is approximately equal to 3,500 calories.
- To lose 1 lb per week, you need a deficit of 500 calories per day (500 x 7 = 3,500).
- To lose 0.5 kg per week, you need a deficit of roughly 550 calories per day.
Warning: It is generally recommended not to lower your daily intake below 1,200 calories for women or 1,500 calories for men without medical supervision, as this can lead to nutrient deficiencies and metabolic slowdown.
Tips for Success
- Be Honest with Activity Levels: Most people overestimate how active they are. If you are unsure, choose the lower activity level to prevent overeating.
- Track Your Intake: Use a food scale and a tracking app to ensure you are hitting the daily calorie target provided by the calculator.
- Monitor and Adjust: Recalculate your BMR after every 10-15 lbs of weight loss, as a lighter body requires fewer calories to function.