Fitness & Health
Macro Calculator
Estimate protein, fat, and carbs from calories and macro split.
Inputs
Adjust the assumptions to match your scenario. Results update instantly.
Results
Primary outputs and comparison insights are built from the current inputs.
Protein grams
180
Daily protein target in grams from the selected calorie split.
Fat grams
66.67
Daily fat target in grams from the selected calorie split.
Carb grams
270
Daily carbohydrate target in grams after protein and fat calories are allocated.
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How this calculator works
The Macro Calculator helps you turn a daily calorie target into protein, fat, and carbohydrate grams using a simple macro percentage split. Enter daily calories, protein percent, and fat percent to estimate protein grams, fat grams, and carb grams. The calculator updates instantly and adds a comparison table plus chart so you can test the sensitivity of the result before you use it in a decision.
Quick guide
Jump straight to the section you need, then return to the calculator.
Inputs
- Daily calorie target used to convert the macro split into grams.
- Share of calories allocated to protein in the daily plan.
- Share of calories allocated to fat in the daily plan.
Outputs
- Daily protein target in grams from the selected calorie split.
- Daily fat target in grams from the selected calorie split.
- Daily carbohydrate target in grams after protein and fat calories are allocated.
Assumptions
- The remaining calories after protein and fat are assigned to carbohydrates.
- Protein and carbohydrates are modeled at 4 calories per gram and fat at 9 calories per gram.
Tips
- Check that protein and fat percentages leave enough calories for carbohydrates before you lock the plan.
- Use this as a planning baseline and then adjust from appetite, performance, and actual bodyweight trends.
Formula guide
Use these formulas to audit the output or explain it to someone else.
2 formulas
Usage examples
Review a ready-made scenario, copy it, then tweak inputs to match your case.
Example
Cutting phase macro split
Inputs
- Example input Daily calories: 2,100
- Example input Protein percent: 35%
- Example input Fat percent: 25%
Outputs
- Example result Protein grams: 183.75
- Example result Fat grams: 58.33
- Example result Carb grams: 210
Macro planning becomes easier when you convert percentages into gram targets you can actually track meal by meal.
Macro grams by daily calories
| Daily calories | Protein grams | Carb grams |
|---|---|---|
| 2,000 | 150 | 225 |
| 2,200 | 165 | 247.5 |
| 2,400 | 180 | 270 |
| 2,600 | 195 | 292.5 |
| 2,800 | 210 | 315 |
Macro plans drift quickly when calories change, so compare a maintenance case with a dieting or gaining case before you prep meals.
Carb target sensitivity
Focus point
2,000
225
Position
#1 of 5
Original order
Share of total
16.67%
Total: 1,350
Macro plans drift quickly when calories change, so compare a maintenance case with a dieting or gaining case before you prep meals.
References
- Macro budgeting with calorie-based diet plans
- Nutrition planning using macro percentage splits
FAQ
Common questions
What does the Macro Calculator do?
The Macro Calculator helps you turn a daily calorie target into protein, fat, and carbohydrate grams using a simple macro percentage split. Enter daily calories, protein percent, and fat percent to estimate protein grams, fat grams, and carb grams. The calculator updates instantly and adds a comparison table plus chart so you can test the sensitivity of the result before you use it in a decision. It is part of our fitness & health toolkit.
What inputs do I need?
Typical inputs include Daily calorie target used to convert the macro split into grams., Share of calories allocated to protein in the daily plan., Share of calories allocated to fat in the daily plan..
How are the results calculated?
We follow the formulas and assumptions outlined in the "How this calculator works" section. You will see outputs like Daily protein target in grams from the selected calorie split., Daily fat target in grams from the selected calorie split., Daily carbohydrate target in grams after protein and fat calories are allocated..
Can I share or download the results?
Use the Copy link or Print buttons to share your results. If a table or chart appears, you can download the data as CSV.
Is my data stored?
No. Calculations run in your browser and we do not store your inputs.
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