Calculator Form
Example Data Table
| Example | Details | Activity | Goal | Estimated Calories |
|---|---|---|---|---|
| Office worker | Female, 35, 65 kg, 165 cm | Light | Maintain | About 1,850 kcal/day |
| Recreational lifter | Male, 28, 82 kg, 180 cm | Moderate | Lean gain | About 3,150 kcal/day |
| Fat loss plan | Male, 42, 95 kg, 178 cm | Sedentary | Fat loss | About 1,900 kcal/day |
| Endurance training | Female, 30, 58 kg, 168 cm | Very active | Maintain | About 2,400 kcal/day |
Formula Used
Mifflin St Jeor
Male BMR = 10 × weight kg + 6.25 × height cm - 5 × age + 5.
Female BMR = 10 × weight kg + 6.25 × height cm - 5 × age - 161.
Revised Harris Benedict
Male BMR = 88.362 + 13.397 × weight kg + 4.799 × height cm - 5.677 × age.
Female BMR = 447.593 + 9.247 × weight kg + 3.098 × height cm - 4.330 × age.
Katch McArdle
Lean mass = weight kg × (1 - body fat percentage ÷ 100).
BMR = 370 + 21.6 × lean mass kg.
Total And Goal Calories
TDEE = BMR × activity factor.
Goal calories = TDEE × goal multiplier + custom daily adjustment.
Weekly change estimate = daily calorie difference × 7 ÷ 7700.
How To Use This Calculator
- Select metric or imperial units.
- Enter sex, age, weight, and height.
- Add body fat percentage if using Katch McArdle.
- Choose an equation and activity level.
- Select a goal or enter a custom adjustment.
- Set protein and fat targets for macro planning.
- Press calculate to show results below the header.
- Download the report as CSV or PDF.
Daily Energy Planning Article
Why Daily Calories Matter
Daily calorie planning starts with a simple question. How much energy does your body use each day? This calculator answers that question with a structured estimate. It begins with basal metabolic rate. That number describes energy used at rest. It then applies an activity multiplier. The final estimate becomes total daily energy expenditure.
Using The Estimate
A good estimate helps with better meal choices. It can support weight loss, weight maintenance, or weight gain. It also helps people compare eating patterns with training demands. The calculator includes common equations. Mifflin St Jeor works well for many adults. Revised Harris Benedict is another classic option. Katch McArdle can help when body fat percentage is known.
Tracking And Adjusting
Daily calories should not be treated as a fixed rule. They are a planning target. Real needs change with sleep, stress, work, exercise, and health. Track your average intake for several days. Also track body weight trends. A single day rarely tells the full story. A two to four week trend gives better feedback.
Loss And Gain Goals
For fat loss, a moderate deficit is usually easier to maintain. Large deficits may reduce energy and training quality. For muscle gain, a modest surplus is often enough. Extra calories do not guarantee lean gain. Protein, resistance training, and recovery still matter.
Macro Planning
Macronutrient results give a useful starting split. Protein is estimated from body weight. Fat is estimated from a calorie percentage. Carbohydrates fill the remaining calories. You can change these settings to match your preference. Athletes may need more carbohydrates. Some people prefer higher fat meals. The best plan is the one that supports consistency.
Safe Use
Use this tool as an educational guide. It does not replace medical advice. People with medical conditions should ask a qualified professional before changing diet sharply. Pregnant people, older adults, and athletes may need special review. Start with the estimate. Adjust with evidence from your own results. Small changes are easier to manage. Clear tracking makes progress easier to understand. The example table shows how activity changes the final number. It also shows how different goals shift intake. Review those rows before using your own data. They can help you spot unrealistic targets. Recalculate after major weight changes, because smaller or larger bodies use different energy amounts each day.
FAQs
What are kcals?
Kcals are food calories. Nutrition labels usually mean kilocalories when they say calories. This calculator uses kcal and calories as the same practical unit.
Which formula should I choose?
Mifflin St Jeor is a strong default for many adults. Use Katch McArdle when you know a reliable body fat percentage.
What is BMR?
BMR means basal metabolic rate. It estimates calories your body uses at rest for basic functions like breathing and circulation.
What is TDEE?
TDEE means total daily energy expenditure. It estimates daily calories after activity is added to basal metabolic rate.
Can this calculator help with weight loss?
Yes. Choose a fat loss goal to estimate a calorie deficit. Track weight trends and adjust carefully over time.
Can I use imperial units?
Yes. Select imperial units. Enter weight in pounds and height in inches. The calculator converts them internally.
Why do macro targets matter?
Macros help divide calories into protein, fat, and carbohydrates. They give a clearer plan than calories alone.
Is this medical advice?
No. It is an educational estimate. Ask a qualified professional before making major diet changes, especially with medical concerns.