Calculator Form
Example Data Table
| Profile | Weight | Activity | Goal Loss | Protein Factor | Expected Use |
|---|---|---|---|---|---|
| Beginner Fat Loss | 80 kg | Light activity | 0.5 kg/week | 1.8 g/kg | Balanced daily meal planning |
| Active Dieter | 92 kg | Moderate activity | 0.7 kg/week | 2.0 g/kg | Higher protein calorie control |
| Slow Cut | 68 kg | Very active | 0.3 kg/week | 1.6 g/kg | Muscle preserving weight loss |
Formula Used
Mifflin-St Jeor BMR: Male = 10W + 6.25H - 5A + 5. Female = 10W + 6.25H - 5A - 161.
Katch-McArdle BMR: BMR = 370 + 21.6 × lean body mass in kg.
TDEE: BMR × activity factor.
Deficit: Weekly goal loss × 7700 calories ÷ 7.
Target calories: TDEE - daily deficit. The calculator limits aggressive deficits.
Protein: Body weight in kg × selected protein factor.
Fat: Body weight in kg × selected fat factor.
Carbs: Remaining calories after protein and fat are assigned.
Fiber: 14 grams per 1000 calories.
Water: 35 ml per kg plus exercise water support.
How to Use This Calculator
Choose your unit system first. Enter your age, sex, height, and weight. Select the activity level that best matches your normal week. Add body fat percentage when known. Choose Katch-McArdle only when your body fat estimate is reliable.
Enter your weekly weight loss goal. A slower goal is often easier to follow. Add your target weight when you want a timeline. Set protein and fat factors based on your diet style. Press the calculate button. The result appears above the form.
Use the CSV button for spreadsheet records. Use the PDF button for a simple printable summary. Recheck your result when weight, training, or activity changes.
Weight Loss Nutrient Planning Guide
Why Nutrients Matter
Weight loss is not only about eating less. Food quality also matters. A good plan gives enough protein, fiber, water, and healthy fat. These targets help control hunger. They also support training, recovery, and daily energy.
Calories Create the Main Change
A calorie deficit drives fat loss. The calculator estimates your daily energy needs. Then it subtracts a controlled deficit. Very large deficits can feel hard. They may reduce performance and increase cravings. A steady plan is usually easier to follow.
Protein Protects Lean Mass
Protein is important during a cut. It supports muscle repair. It also improves fullness after meals. Many people use 1.6 to 2.2 grams per kilogram. Higher targets may suit active users. Lower targets may suit beginners with smaller appetites.
Carbs and Fat Have Different Jobs
Carbs fuel training and daily movement. Fat supports hormones and meal satisfaction. The calculator sets protein and fat first. Then it gives remaining calories to carbs. This method keeps the plan flexible. You can adjust factors to fit your diet.
Fiber and Water Improve Control
Fiber helps meals feel larger. It supports digestion and stable appetite. Water needs rise with body size and exercise. The calculator adds extra water for daily training. These values are practical targets. They are not strict medical rules.
Use Results With Common Sense
Track progress for two to four weeks. Watch body weight trends, waist size, hunger, sleep, and strength. If weight does not change, review portions. If energy drops too much, raise calories slightly. Sustainable weight loss needs patience and repeatable habits.
FAQs
1. What does this nutrient calculator estimate?
It estimates daily calories, protein, carbs, fat, fiber, water, sugar limits, sodium range, and per meal targets for weight loss planning.
2. Which formula should I choose?
Use Mifflin-St Jeor for most cases. Use Katch-McArdle when you know a reliable body fat percentage and want lean mass based estimation.
3. Is a bigger calorie deficit better?
Not always. A large deficit may increase hunger, fatigue, and muscle loss risk. A moderate deficit is usually easier to maintain.
4. How much protein should I use?
Many weight loss plans use 1.6 to 2.2 grams per kilogram. Active users often prefer the higher end of that range.
5. Why are carbs calculated last?
Protein and fat have minimum planning needs. After those calories are assigned, the remaining calories are converted into carbohydrate grams.
6. Can I download my result?
Yes. After calculation, use the CSV button for spreadsheet data or the PDF button for a printable summary file.
7. Should I follow the water target exactly?
No. It is a practical estimate. Climate, sweat, salt intake, and health conditions can change personal water needs.
8. Is this calculator medical advice?
No. It is an educational planning tool. People with medical conditions should ask a qualified clinician before changing diet targets.