Calculator Inputs
Example Data Table
| Profile | Weight | Activity | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|---|
| Beginner fat loss | 75 kg | Light | 1,650 | 117 g | 168 g | 52 g |
| Moderate training | 68 kg | Moderate | 1,850 | 122 g | 200 g | 58 g |
| Higher activity | 82 kg | Very active | 2,100 | 148 g | 221 g | 66 g |
Formula Used
The calculator estimates female basal metabolic rate first. The default equation is: BMR = 10 × weight kg + 6.25 × height cm − 5 × age − 161.
If body fat is entered and Katch-McArdle is selected, it uses: BMR = 370 + 21.6 × lean body mass kg.
Maintenance calories are calculated as: TDEE = BMR × activity factor + daily exercise calories. The weight loss target uses: daily deficit = weekly loss kg × 7700 ÷ 7.
Protein and fat are set by grams per kilogram. Carbs receive the remaining calories. Protein and carbs use 4 calories per gram. Fat uses 9 calories per gram.
How to Use This Calculator
Choose your unit system first. Enter your age, height, current weight, and target weight. Pick an activity level that matches your normal week. Add exercise calories only when they are not included in your activity level.
Select a BMR formula. Use Mifflin-St Jeor for most users. Use Katch-McArdle when you know your body fat percentage. Then choose your weekly weight loss goal and macro rates. Press calculate to view calories, macros, meal splits, and timeline.
Female Weight Loss Macro Planning Guide
Why Macros Matter
Weight loss starts with energy balance. Your body uses energy for breathing, movement, digestion, and training. When intake stays below maintenance, stored energy fills the gap. This calculator turns that idea into daily macro targets. It gives a practical plan for calories, protein, carbohydrates, and fats.
Protein Supports Lean Mass
Protein is important during fat loss. It helps support lean tissue. It also improves fullness after meals. Many women prefer a higher protein target while dieting. The calculator lets you set protein per kilogram. You can base that number on current weight, target weight, or lean mass.
Fats and Carbs Balance Energy
Dietary fat supports hormones, meals, and taste. Carbohydrates fuel training and daily movement. After protein and fat are assigned, remaining calories become carbohydrates. This method keeps the plan structured. It also makes adjustments easier when progress changes.
Deficit Control
Aggressive deficits can be hard to follow. They may reduce training quality. They may also increase hunger. The deficit cap helps limit extreme calorie cuts. A steady plan is often easier to repeat. Good tracking matters more than perfect math.
Using the Results
Use the result as a starting estimate. Track weight trends for two to four weeks. Review energy, hunger, sleep, and workout performance. If progress is too slow, adjust calories slightly. If fatigue is high, reduce the deficit. A safe plan should feel structured, flexible, and sustainable.
FAQs
1. Is this calculator only for women?
Yes. It uses the female Mifflin-St Jeor equation by default. That equation includes a female-specific constant for BMR estimation.
2. Which BMR formula should I choose?
Use Mifflin-St Jeor for general planning. Use Katch-McArdle when you know your body fat percentage and want lean mass based results.
3. What is the best protein rate?
Many fat loss plans use about 1.6 to 2.2 grams per kilogram. Higher values may suit strength training and appetite control.
4. Why are my carbs very low?
Carbs are calculated after protein and fat. If calories are low or protein and fat are high, carb grams can shrink quickly.
5. Should exercise calories be added?
Add them only if your chosen activity level does not already include workouts. Otherwise, you may count the same activity twice.
6. What does the deficit cap do?
It limits the calorie deficit to a chosen percentage of maintenance. This helps prevent very aggressive targets from user inputs.
7. Can I use this while pregnant?
This tool is not designed for pregnancy, breastfeeding, eating disorders, or medical diets. Ask a qualified clinician for personal guidance.
8. How often should I update my macros?
Update macros after meaningful weight change or several weeks of tracking. Smaller weekly changes usually do not require recalculation.