Free Calorie Calculator
Daily calorie needs for maintenance, cutting, and bulking.
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Result
Target daily calories
2,556 kcal
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Short answer
Daily calorie needs equal Basal Metabolic Rate (BMR) times an activity multiplier. Subtracting 500 kcal/day yields roughly 0.5 kg (1 lb) of fat loss per week.
What is the Calorie Calculator?
Daily calorie needs represent the energy your body expends over 24 hours, including basal metabolism, digestion, spontaneous movement, and exercise.
How does the Calorie Calculator work?
Compute BMR from Mifflin–St Jeor, multiply by an activity factor, then add or subtract calories for your target rate of change.
Formula
Variables
BMRBasal Metabolic Rate (Mifflin–St Jeor)activityMultiplier from 1.2 (sedentary) to 1.9 (extra active)adjustment−1000 to +550 kcal for weight-change goal
Explanation
One kilogram of body fat stores about 7,700 kcal, so a 500 kcal/day deficit produces roughly 0.5 kg fat loss per week.
Examples
Example 1: Moderately active male, maintenance
Target ~2,556 kcal/day.
Example 2: Lightly active female, moderate loss
Target ~1,470 kcal/day for ~0.5 kg loss per week.
Applications
- Weight-loss and muscle-gain diets
- Sports nutrition
- Metabolic health tracking
Advantages
- Individualized to body size and activity
- Aligns intake with a measurable weight goal
Limitations
- Estimates only — actual expenditure varies ±10–15%
- Ignores non-exercise activity variability
Common mistakes
- Choosing an activity multiplier that is too high
- Ignoring protein intake when cutting
Tips
- Weigh yourself weekly and adjust intake if the trend stalls for 2+ weeks
- Track for at least 2 weeks before drawing conclusions
Related concepts
The Calorie Calculator sits inside the Health Calculators hub, in the nutrition & diet cluster. Energy targets and macronutrient planning. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Calorie
Daily calorie needs represent the energy your body expends over 24 hours, including basal metabolism, digestion, spontaneous movement, and exercise. Within health calculators, calorie belongs to the nutrition & diet cluster, where it shares terminology and assumptions with closely related tools.
Learning how calorie is calculated
One kilogram of body fat stores about 7,700 kcal, so a 500 kcal/day deficit produces roughly 0.5 kg fat loss per week. Working through the variables one at a time — BMR, activity, adjustment — makes the result reproducible by hand and easier to sanity-check.
Using calorie to make a decision
Weight-loss and muscle-gain diets Sports nutrition Metabolic health tracking Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How calorie compares with related measures
energy balance, macronutrient split, hydration, thermic effect all describe adjacent aspects of nutrition & diet. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
Can I lose more than 1 kg per week?
Yes, but larger deficits risk muscle loss, hormonal disruption, and rebound eating. 0.5–1% of body weight per week is a common recommendation.
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