Enter Your Details
Example Data Table
| Profile | Weight | Activity | Deficit | Calories | Protein | Fat | Carbs |
|---|---|---|---|---|---|---|---|
| Beginner cut | 80 kg | Light | 20% | 1,980 kcal | 144 g | 55 g | 228 g |
| High protein | 92 kg | Moderate | 15% | 2,420 kcal | 202 g | 67 g | 252 g |
| Lower carb | 68 kg | Very active | 10% | 2,160 kcal | 136 g | 84 g | 216 g |
Formula Used
Mifflin-St Jeor BMR: Men: 10 × weight kg + 6.25 × height cm − 5 × age + 5. Women: 10 × weight kg + 6.25 × height cm − 5 × age − 161.
Katch-McArdle BMR: 370 + 21.6 × lean body mass kg. Lean mass equals body weight multiplied by one minus body fat percentage.
TDEE: BMR × activity factor. Target calories: TDEE − selected calorie deficit. Protein calories: protein grams × 4. Fat calories: fat grams × 9. Carb calories: remaining calories after protein and fat.
Estimated weekly weight change: daily deficit × 7 ÷ 7,700. This is an estimate because water balance, digestion, sodium, and training stress can change scale weight.
How to Use This Calculator
- Select metric or imperial units before entering your measurements.
- Enter age, sex, current weight, goal weight, and height.
- Add body fat percentage if you want the lean mass based formula.
- Choose the activity level that best matches your average week.
- Select a calorie deficit. Start moderate if adherence is difficult.
- Choose a macro strategy or enter custom protein and fat targets.
- Submit the form. Results appear above the form and below the header.
- Download the results as CSV or PDF for tracking and meal planning.
Macro Planning for Weight Loss
Why Macro Planning Helps Weight Loss
Weight loss works best when your food plan is clear. Calories guide the size of the deficit. Macros shape hunger, energy, and recovery. Protein helps protect lean tissue. Fat supports hormones and taste. Carbs support training, steps, and busy workdays. This calculator joins these parts into one target. It starts with body size, age, sex, and activity. Then it estimates daily energy needs. After that, it applies a planned calorie deficit.
Choosing a Sustainable Deficit
A good deficit should feel steady. Very low targets can reduce energy. They may also make adherence harder. A moderate deficit is often easier to follow. The tool shows estimated weekly weight change. It also shows a timeline for your goal. Treat that timeline as a guide. Real progress changes with water, sodium, sleep, and training.
Balancing Protein, Fat, and Carbs
Protein is the anchor for most plans. Higher protein can improve fullness. It also supports muscle during a cut. Fat should not fall too low. Carbs fill the remaining calories. This gives flexible targets. You can choose balanced, lower carb, or high protein settings. You can also set custom protein and fat values.
Turning Numbers Into Meals
Meal targets make the plan practical. Dividing macros by meals helps with planning. It can guide breakfast, lunch, dinner, and snacks. You do not need perfect numbers every meal. Aim to reach the daily average. Weekly consistency matters more than one meal.
Reviewing Progress
Use the results with common sense. Choose foods you enjoy. Include fruits, vegetables, fiber, and enough fluids. Track portions for a few weeks. Review body weight trends, not single weigh-ins. Adjust slowly when progress stalls. Small changes are easier to maintain. This calculator gives structure, but habits create results.
Recalculate after meaningful weight loss. A lighter body needs fewer calories. Activity can also change across seasons. Strength training may raise food needs. Rest days may need less fuel. Keep protein steady on most days. Move carbs around hard workouts. Keep fat within a comfortable range. If hunger is high, add more volume foods. If energy is low, reduce the deficit. Medical conditions, pregnancy, or eating disorder history need professional guidance. Use the output as an educational estimate only. Review results every two weeks and change one setting slowly.
Frequently Asked Questions
1. What is a macro nutrition calculator?
It estimates daily calories, protein, fats, and carbohydrates. The goal is to give practical food targets for weight loss, training, and meal planning.
2. Which formula should I choose?
Use Mifflin-St Jeor for most people. Use Katch-McArdle when you know a reasonable body fat estimate and want lean mass included.
3. Is a bigger calorie deficit better?
Not always. A larger deficit may increase hunger and reduce training quality. A moderate deficit is often easier to sustain for longer.
4. How much protein should I use?
Many weight loss plans use higher protein. The calculator lets you set grams per kilogram, so you can match comfort, training, and food preferences.
5. Why did my carbs become zero?
Your protein and fat settings may use all available calories. Reduce protein per kilogram or fat percentage to leave calories for carbohydrates.
6. Can I use this for meal prep?
Yes. Enter your meals per day. The result shows calories and macros per meal, making meal prep portions easier to plan.
7. How often should I recalculate?
Recalculate after a meaningful weight change, activity change, or stalled progress. Many people review targets every two to four weeks.
8. Are the results medical advice?
No. The results are educational estimates. Speak with a qualified professional if you have medical needs, pregnancy, or eating disorder history.