MacroBench

Macros from Calories

Any calories, any percentage split — get grams instantly.

Daily calories

Protein %

Fat %

Carbs %

Protein: 165 g
Fat: 73 g
Carbs: 220 g

What you entered

Calories: 2200 kcalSplit: 30/30/40

1
Protein: 30% of calories ÷ 4 kcal/g
(2200 × 30/100) ÷ 4= 165 g
2
Fat: 30% of calories ÷ 9 kcal/g
(2200 × 30/100) ÷ 9= 73 g
3
Carbs: 40% of calories ÷ 4 kcal/g
(2200 × 40/100) ÷ 4= 220 g

Result

Protein: 165 g

At 2200 kcal with a 30/30/40 split, that's 165g protein, 73g fat, and 220g carbs.

Macro grams at a 40/30/30 split

A balanced 40% carbohydrate, 30% protein, 30% fat split. Protein and carbohydrate provide 4 calories per gram, fat provides 9.

Daily calories	Protein (30%)	Fat (30%)	Carbs (40%)
1,500 kcal	113 g	50 g	150 g
1,800 kcal	135 g	60 g	180 g
2,000 kcal	150 g	67 g	200 g
2,200 kcal	165 g	73 g	220 g
2,500 kcal	188 g	83 g	250 g

Fat grams look small next to the others because fat packs more than twice the calories per gram. General wellness information only, not medical advice. Discuss any health decision with a qualified clinician.

Percentages don't translate 1-to-1 into grams

Because protein and carbs have 4 calories per gram while fat has 9, a 30% calorie split for fat is fewer grams than a 30% split for protein at the same calorie level — this calculator does that conversion for you.

Why flexible splits matter

Different diet approaches (balanced, high-protein, low-carb) all use different percentage splits — having a calculator that accepts any split means you're not locked into one preset diet philosophy.

Frequently asked questions

What is a good macro split for weight loss?

A common effective split is 40% protein, 30% carbs, 30% fat. Higher protein (35–40%) helps preserve muscle during a calorie deficit. At 1,800 calories with a 40/30/30 split: 180g protein, 135g carbs, 60g fat. Adjust based on how you feel and perform.

How do I convert macro percentages to grams?

Protein and carbs have 4 calories per gram; fat has 9. At 2,000 calories with a 30/40/30 (protein/carb/fat) split: Protein = 2,000 × 0.30 ÷ 4 = 150g. Carbs = 2,000 × 0.40 ÷ 4 = 200g. Fat = 2,000 × 0.30 ÷ 9 = 67g.

Do macro ratios matter more than total calories?

For weight change, total calories matter most. For body composition (muscle vs fat), macros matter significantly — higher protein preserves muscle during a deficit and builds it during a surplus. For performance, carb intake affects endurance exercise. Both matter, but calories drive weight and macros drive composition.