Calorie Calculator
Formula Used
Mifflin St Jeor for men: BMR = 10 × weight kg + 6.25 × height cm - 5 × age + 5.
Mifflin St Jeor for women: BMR = 10 × weight kg + 6.25 × height cm - 5 × age - 161.
Katch McArdle: BMR = 370 + 21.6 × lean body mass kg.
Total daily energy: TDEE = BMR × activity factor.
Goal adjustment: daily change = weekly weight change kg × 7700 ÷ 7.
Macros: protein and fat calories are calculated first. Carbohydrates use the remaining calories.
How to Use This Calculator
- Select your sex, age, unit system, height, and weight.
- Enter body fat if you want lean mass based estimates.
- Choose the activity level closest to your weekly routine.
- Select your goal as maintenance, weight loss, or weight gain.
- Add protein, fat, and meal preferences.
- Press calculate to view calories and daily macros.
- Use CSV or PDF export for tracking and planning.
Example Data Table
| Profile | Activity | Goal | Estimated Target | Macro Note |
|---|---|---|---|---|
| 30 year male, 80 kg, 178 cm | Moderate | Maintain | About 2700 calories | Higher carbs may support training. |
| 35 year female, 65 kg, 165 cm | Light | Lose 0.25 kg weekly | About 1650 calories | Protein helps fullness. |
| 24 year male, 70 kg, 175 cm | Very active | Gain 0.25 kg weekly | About 3150 calories | Use a steady surplus. |
Daily Calorie Planning Guide
About This Daily Calorie Tool
A daily calorie target is not a fixed rule. It is a starting estimate. Your body changes with activity, sleep, stress, and food choices. This calculator combines body details, activity level, and goal speed. It then gives a practical target for maintenance, fat loss, or weight gain.
Why Calories Matter
Calories measure food energy. When intake matches daily use, weight is usually stable. When intake stays below use, stored energy can decrease. When intake stays above use, body mass can increase. The result is most useful when you track trends for two to four weeks. Do not judge progress from one day.
How The Estimate Works
The tool first estimates basal metabolic rate. This is the energy used at rest. It uses the Mifflin St Jeor equation for most users. If body fat is entered, it can also show a lean mass estimate. Activity is then applied to find total daily energy expenditure. Goal adjustment is added after that.
Using The Target Well
Choose a goal that matches your lifestyle. A smaller deficit is easier to sustain. A moderate surplus can support muscle gain with less fat gain. Protein helps recovery and fullness. Fat supports hormones and vitamin absorption. Carbohydrates fill the remaining energy and support training.
Advanced Planning Tips
Use the meal count field to split daily macros. This makes planning simple. Compare the maintenance number with the target number. The gap shows how aggressive your plan is. If hunger, fatigue, or poor training rises, reduce the gap. If weight does not change after several weeks, adjust slowly.
Safety And Accuracy
This calculator is an educational guide. It is not medical advice. People who are pregnant, underweight, ill, or managing a medical condition should ask a qualified professional before changing intake. Use honest inputs. Weigh yourself consistently. Review waist, strength, mood, and energy too.
Final Notes
Good nutrition is more than calories. Food quality, fiber, hydration, and routine matter. Use this number to plan meals, not to create fear. A steady plan is better than a harsh plan. Small adjustments often lead to stronger long term results. Keep records weekly, and let real results guide each careful change you make next over time safely.
FAQs
1. How many calories should I eat daily?
Your daily calories depend on age, sex, height, weight, activity, and goal. The calculator estimates maintenance first. Then it adjusts for weight loss or gain.
2. What is BMR?
BMR means basal metabolic rate. It estimates calories your body uses at rest for basic functions like breathing, circulation, and cell repair.
3. What is TDEE?
TDEE means total daily energy expenditure. It combines BMR with daily activity. It is often called your maintenance calorie level.
4. Should I use metric or imperial units?
Use whichever system you know best. Metric uses kilograms and centimeters. Imperial uses pounds and inches. The calculator converts values internally.
5. Why enter body fat percentage?
Body fat helps estimate lean mass. Lean mass can improve BMR estimates for trained users. Leave it at zero if you do not know it.
6. What is a safe calorie deficit?
A small or moderate deficit is easier to follow. Very low calories can increase hunger, fatigue, and diet failure. Seek guidance for strict plans.
7. How accurate is this calculator?
It gives an estimate, not a guarantee. Track body weight and energy for several weeks. Adjust calories based on real results.
8. Can I use this for muscle gain?
Yes. Choose the gain goal and use a controlled surplus. Combine it with progressive training, enough protein, sleep, and consistent meals.