Personalized estimate
Enter Your Details
Use your normal routine, not one unusually active day. Fields marked with an asterisk are required.
Sample result
Example Data Table
| Profile | BMR | Activity Factor | Maintenance | Goal Target |
|---|---|---|---|---|
| Female, 30 years, 65 kg, 170 cm | 1,390 kcal | 1.55 | 2,155 kcal | 1,880 kcal for gradual loss |
| Male, 35 years, 82 kg, 180 cm | 1,780 kcal | 1.55 | 2,760 kcal | 3,035 kcal for gradual gain |
| Female, 42 years, 72 kg, 165 cm | 1,370 kcal | 1.375 | 1,884 kcal | 1,884 kcal for maintenance |
Calculation method
Formula Used
Male BMR = 10W + 6.25H − 5A + 5
Female BMR = 10W + 6.25H − 5A − 161
Lean body mass = Weight × (1 − Body fat ÷ 100)
BMR = 370 + (21.6 × Lean body mass)
W is weight in kilograms. H is height in centimeters. A is age in years. The calculator finds maintenance calories with:
For weight change, the tool uses roughly 7,700 kcal per kilogram. Daily adjustment = weekly change × 7,700 ÷ 7. Protein provides 4 kcal per gram. Carbohydrates provide 4 kcal per gram. Fat provides 9 kcal per gram.
Simple process
How to Use This Calculator
- Choose the measurement system you use most accurately.
- Enter your sex, age, current weight, and height.
- Select the activity level that matches a typical week.
- Choose maintenance, loss, or gain as your primary goal.
- Set a modest weekly change for loss or gain.
- Select an equation. Add body fat only for Katch-McArdle.
- Review the calorie target, macro estimates, and caution messages.
- Track your trend for two to four weeks before adjusting.
Practical guidance
Understanding Your Daily Calorie Intake
Daily calorie intake is the energy your body uses each day. Your body needs calories for breathing, digestion, movement, work, recovery, and temperature control. A useful target supports your current goal without ignoring nutrition quality. This calculator estimates a practical daily target from personal measurements and lifestyle choices.
Start with basal metabolic rate, often called BMR. BMR estimates energy used while resting. It does not include walking, work tasks, training, or routine movement. The calculator applies an activity factor to BMR. That creates total daily energy expenditure, also called TDEE. TDEE is your estimated maintenance level.
Maintenance calories help your body weight stay near its current level. Daily scale changes can still happen. Water, sodium, glycogen, digestion, and sleep affect short-term weight. Review trends across several weeks instead of reacting to one measurement. A steady pattern gives better information.
For weight loss, the calculator subtracts an estimated energy deficit. A slower rate is usually easier to maintain. It can also protect training performance and meal flexibility. For weight gain, the calculator adds an estimated surplus. Smaller surpluses can help limit unnecessary fat gain. Use a realistic weekly target.
Protein, fat, and carbohydrate recommendations make the calorie number more useful. Protein supports muscle repair and fullness. Dietary fat supports hormones and nutrient absorption. Carbohydrates supply energy for training and daily activity. The displayed macro split is a starting point. Adjust it for food preferences, medical needs, and training demands.
Use accurate measurements for better results. Measure weight under similar conditions. Enter height carefully. Select an activity level that reflects your average week. Do not choose a demanding activity option for occasional exercise. Consistent daily movement matters. Active jobs and frequent walking can raise calorie needs substantially.
Your actual calorie needs may differ from the estimate. Genetics, medications, health conditions, stress, and sleep can change energy use. Pregnant people, teenagers, people with eating concerns, and anyone managing a medical condition should seek professional advice. A registered dietitian can provide personal guidance.
Track your intake and body-weight trend for two to four weeks. Keep your food logging method consistent. Then compare the observed trend with the chosen goal. If progress is too slow, make a small adjustment. If progress is too fast, add calories back. Changes of 100 to 200 calories are often enough.
Use the result as a starting estimate, not a rigid rule. Meals do not need identical calories every day. Higher activity days may need more food. Rest days may need less. Keep the weekly average near your target. This approach improves flexibility and reduces unnecessary stress during meal planning.
Avoid chasing perfect daily numbers. Weekly consistency matters more. Build meals around protein-rich foods, fiber, fruits, vegetables, whole grains, and healthy fats. Hydration also helps you interpret hunger and performance. The calculator is most useful when paired with sustainable habits. Choose routines that fit your life and support long-term health.
Common questions
Frequently Asked Questions
1. What is a calorie intake calculator?
It estimates daily energy needs from body data, activity, and a chosen goal. The result is a useful starting point, not a medical prescription.
2. Which BMR equation should I choose?
Use Mifflin-St Jeor when you know age, sex, height, and weight. Choose Katch-McArdle only when you have a credible body-fat estimate.
3. What does maintenance calories mean?
Maintenance calories are the estimated intake that keeps your average body weight stable over time. Daily changes still occur from water and food volume.
4. How accurate is this calorie target?
It is an informed estimate. Your actual needs can change with movement, sleep, stress, health, and tracking accuracy. Check results against several weeks of trends.
5. How quickly should I lower calories?
Use a modest deficit first. A gradual pace is usually easier to sustain. Adjust only after consistent logging and body-weight data show a clear trend.
6. Should I eat the same calories every day?
Not necessarily. You can vary intake across training and rest days. Keep the weekly average close to your target and retain adequate protein.
7. Why is my scale weight changing despite maintenance calories?
Water, sodium, carbohydrates, digestion, hormones, and exercise recovery can shift scale weight. Use weekly averages before deciding that the target needs changing.
8. Are the macro recommendations required?
No. They are flexible starting targets. Meet your calorie and protein needs first, then adjust fats and carbohydrates for preference, culture, and training.
9. Can I use this calculator during pregnancy?
Use professional prenatal guidance instead. Pregnancy energy needs depend on trimester, health history, fetal growth, and activity. A clinician can set a safer target.
10. Does the calculator work for teenagers?
This tool is designed for adults. Teenagers need growth-aware guidance. Parents or guardians should consult a qualified health professional for personalized recommendations.
11. When should I change my calorie target?
Review after two to four weeks of consistent data. Change by a small amount when the observed trend clearly misses your goal.