ganak.appCalorie Calculator
Free calorie calculator to find your daily calorie needs. Calculate maintenance calories, calorie deficit for weight loss, or surplus for muscle gain. Uses Mifflin-St Jeor and Katch-McArdle formulas. Includes BMR, TDEE, macronutrient breakdown, and goal-based calorie targets with weight change projections.
Maintain your current weight
Calorie Goals
Compare all goal and pace options to find your ideal calorie target
| Scenario | Per Week | Daily Calories |
|---|---|---|
Aggressive | -0.75kg/wk | 1,682kcal |
Moderate | -0.50kg/wk | 1,957kcal |
Slow | -0.25kg/wk | 2,232kcal |
Maintain | 0kg/wk | 2,507kcal |
Slow | +0.25kg/wk | 2,782kcal |
Moderate | +0.50kg/wk | 3,057kcal |
Aggressive | +0.75kg/wk | 3,332kcal |
Understanding Your Numbers
Key metrics that determine your daily calorie needs
Formula Comparison: Mifflin-St Jeor: 1618 kcal | Katch-McArdle: 1580 kcal
Daily Macronutrients
Recommended macros for your maintenance goal
Protein
25%
2.2g/kg
Fats
25%
1.0g/kg
Carbs
50%
4.5g/kg
Visual Comparison
Weekly weight change (kg/wk) vs daily calories. The dotted line shows your TDEE.
What is a Calorie Calculator?
Your tool for understanding daily energy needs
A calorie calculator helps you determine how many calories you need to eat each day to achieve your weight goals. Whether you want to lose weight, maintain your current weight, or gain muscle mass, knowing your daily calorie needs is the foundation of any successful nutrition plan.
This calculator uses scientifically-validated formulas (Mifflin-St Jeor and Katch-McArdle) to estimate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE), then adjusts based on your specific goal and desired pace of change.
How the Calorie Calculator Works
Three simple steps to find your target
- 1Calculate BMR
First, we calculate your Basal Metabolic Rate - the calories your body burns at complete rest just to maintain basic functions like breathing and circulation.
- 2Apply Activity Multiplier
Your BMR is multiplied by an activity factor (1.2 to 1.9) based on your lifestyle to get your TDEE - the total calories you burn daily including all activities.
- 3Adjust for Your Goal
Finally, we subtract or add calories based on your weight goal. A 500 calorie deficit typically leads to about 0.5 kg (1 lb) of weight loss per week.
Understanding Calorie Deficit for Weight Loss
The science behind sustainable fat loss
A calorie deficit occurs when you consume fewer calories than your body burns. This forces your body to use stored fat for energy, resulting in weight loss.
1 kg of body fat ≈ 7,700 calories
To lose 0.5 kg per week, you need a daily deficit of about 550 calories
Slow (0.25 kg/week)
~275 cal deficit. Easier to maintain, preserves muscle mass.
Moderate (0.5 kg/week)
~550 cal deficit. Balanced approach for steady progress.
Aggressive (0.75 kg/week)
~825 cal deficit. Faster results but harder to sustain.
What Are Maintenance Calories?
Understanding your body's energy balance point
Maintenance calories (also called TDEE - Total Daily Energy Expenditure) is the number of calories you need to eat to maintain your current weight. Eating at this level means you won't gain or lose weight.
Your maintenance calories depend on several factors:
Activity Level
More active = more calories
Body Weight
Heavier = more calories
Height
Taller = more calories
Age
Younger = more calories
BMR Calculation Formulas
The equations behind your metabolic rate
Mifflin-St Jeor Equation
Men: (10 × weight) + (6.25 × height) - (5 × age) + 5
Women: (10 × weight) + (6.25 × height) - (5 × age) - 161
Most accurate for the general population. Uses weight (kg), height (cm), and age.
Katch-McArdle Formula
BMR = 370 + (21.6 × lean body mass in kg)
More accurate for lean/muscular individuals. Requires body fat percentage.
Activity Level Multipliers
How your lifestyle affects calorie needs
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.2 | Little or no exercise, desk job |
| Lightly Active | 1.375 | Light exercise 1-3 days/week |
| Moderately Active | 1.55 | Moderate exercise 3-5 days/week |
| Very Active | 1.725 | Hard exercise 6-7 days/week |
| Extra Active | 1.9 | Very hard daily exercise or physical job |
Tips for Calorie Counting Success
Best practices and common pitfalls to avoid
Do This
- Track your food intake consistently for at least 2 weeks
- Weigh yourself at the same time each day (morning is best)
- Adjust calories based on actual progress, not just calculations
- Prioritize protein to preserve muscle during weight loss
Avoid This
- Eating below your BMR for extended periods
- Expecting perfectly linear weight loss (fluctuations are normal)
- Ignoring hunger signals completely
- Drastically cutting calories without consulting a professional
Important Disclaimer
Please read before making dietary changes
This calorie calculator provides estimates based on established formulas. Individual calorie needs can vary based on genetics, medical conditions, medications, and other factors. These results are for informational purposes only and should not replace professional medical advice. Always consult with a healthcare provider or registered dietitian before making significant changes to your diet, especially if you have health conditions or are pregnant.
Frequently Asked Questions
Common questions about calorie intake, TDEE, and weight management