Calculate Your Daily Calorie Allowance
Estimate maintenance calories, weight-loss targets, or weight-gain targets using the Mifflin-St Jeor equation plus an activity multiplier.
What is a daily calorie allowance?
Your daily calorie allowance is the number of calories you should eat per day to reach a specific goal: maintain your current weight, lose body fat, or gain weight. It is not a perfect number, but it is an effective starting point for nutrition planning.
A practical calorie target helps you avoid guesswork. Instead of random dieting, you can make informed adjustments and track outcomes over time.
How this calculator works
1) Basal Metabolic Rate (BMR)
The calculator estimates your BMR using the Mifflin-St Jeor formula. BMR is the energy your body needs at rest for vital functions like breathing, circulation, and temperature regulation.
2) Total Daily Energy Expenditure (TDEE)
Next, the calculator multiplies your BMR by an activity factor to estimate TDEE, which reflects your likely maintenance calories.
3) Goal adjustment
To support weight change, the calculator adds or subtracts calories from TDEE:
- Weight loss: calorie deficit
- Weight gain: calorie surplus
- Weight maintenance: stay near TDEE
How to use your calorie target effectively
Track consistently for 2–3 weeks
Body weight fluctuates daily due to fluid, sodium, glycogen, and digestion. Use weekly averages instead of daily spikes to judge progress.
Adjust based on real progress
If your 2–3 week average weight trend does not match your goal, adjust intake by 100–200 kcal/day and continue monitoring.
Prioritize food quality
Calories matter, but food quality affects hunger, energy, and recovery. Base your plan on lean proteins, whole grains, fruits, vegetables, legumes, nuts, and healthy fats.
Suggested macro breakdown
The calculator provides a simple macro estimate:
- Protein: supports muscle retention and satiety
- Fat: supports hormones and absorption of fat-soluble vitamins
- Carbohydrates: provide training fuel and daily energy
Macro targets are useful guardrails, not strict rules. Adherence and consistency are more important than perfect precision.
Common mistakes to avoid
- Choosing an unrealistic deficit that leads to burnout
- Not weighing food portions during the first learning phase
- Ignoring weekend eating patterns
- Changing calories too quickly before collecting enough trend data
- Expecting linear fat loss every single week
Who should be cautious?
If you are pregnant, breastfeeding, under 18, recovering from an eating disorder, or managing a chronic condition, use individualized advice from a qualified clinician instead of a generic calorie estimator.
Bottom line
A daily calorie allowance calculator gives you a rational starting point. Use it, track results, and adjust slowly based on real-world data. Sustainable progress beats aggressive short-term dieting every time.