Calorie Calculator
Calculate daily calorie needs for weight goals.
Input & results
Input values
Results
Enter values to see instant results.
Calculation History
- Your calculations will appear here.
Recent calculations are saved automatically as you adjust inputs.
Health and fitness results are estimates for general informational purposes only and are not medical advice. Consult a qualified healthcare professional before making health decisions. See our full disclaimer.
What is Calorie?
A Calorie Calculator estimates your total daily energy expenditure (TDEE) — the calories you burn each day including activity — and suggests intake targets for losing, maintaining, or gaining weight.
Your daily calorie needs depend on your basal metabolic rate and how active you are. This calculator first estimates BMR, then multiplies it by an activity factor to find your TDEE. From there it derives targets: a deficit for weight loss, maintenance calories to stay the same, and a surplus for weight gain. It turns your body metrics and lifestyle into actionable nutrition numbers.
Why is it used?
Calorie balance is the primary driver of weight change. Knowing your TDEE and target intake removes guesswork from dieting and helps you set a sustainable plan rather than relying on generic numbers.
Who should use it?
Anyone aiming to lose, maintain, or gain weight, and people who want a personalized daily calorie target based on their body and activity level.
How it works
- Enter Weight (kg), Height (cm), Age, Activity Level, Gender in the input fields.
- The calculator validates your entries and applies the correct calorie formula.
- Results update in real time as you change any value — no submit button needed.
- Review the formula, variable definitions, and worked example below to see how the answer is derived.
Formula
Variable definitions
| Variable | Meaning |
|---|---|
| BMR | Basal metabolic rate (calories at rest) |
| Activity Factor | Multiplier from 1.2 (sedentary) to 1.9 (very active) |
| TDEE | Total daily energy expenditure |
How the formula works
- Estimate BMR from weight, height, age, and sex.
- Select an activity factor that matches your lifestyle.
- Multiply BMR by the activity factor to get TDEE.
- Subtract ~500 for weight loss or add ~500 for gain.
Example calculation
Moderately active person with a BMR of 1,600 calories.
| Input | Value |
|---|---|
| BMR | 1,600 cal |
| Activity level | Moderate (1.55) |
- TDEE = 1600 × 1.55 = 2,480
- Weight loss target = 2,480 − 500 = 1,980
- Weight gain target = 2,480 + 500 = 2,980
Result
More examples
Same BMR, sedentary lifestyle.
| Input | Value |
|---|---|
| BMR | 1,600 |
| Activity | Sedentary (1.2) |
- TDEE = 1600 × 1.2 = 1,920
Result
Methodology
- Gather Weight (kg), Height (cm), Age, Activity Level, Gender from your documents or estimates.
- Enter each value in the matching field; units must match the labels.
- The calculator applies the Calorie formula and updates results in real time.
- Compare scenarios by changing one input at a time.
Benefits
- Get personalized daily calorie targets.
- Set realistic deficits or surpluses.
- Account for your actual activity level.
- Plan nutrition with concrete numbers.
Use cases
- Starting a weight-loss diet.
- Planning a muscle-building bulk.
- Maintaining current weight.
- Adjusting intake as activity changes.
Tips & important notes
- Be honest about your activity level — most people overestimate it.
- A 500-calorie daily deficit yields roughly 0.5 kg loss per week.
- Recalculate as your weight and activity change.
- Pair calorie targets with adequate protein.
Common mistakes
- Overestimating activity level, inflating TDEE.
- Setting an extreme deficit that is hard to sustain.
- Ignoring that needs change as weight drops.
Related concepts
- BMR and the Mifflin-St Jeor equation
- Macronutrient split and protein intake
- Calorie deficit and energy balance
Good to know