Counting calories only gets you halfway there — how those calories are split between protein, carbs, and fat shapes how a diet actually feels and performs. Our macro calculator does that split for you, instantly.
- Presets that make sense — Balanced, Low-Carb, High-Protein, and Low-Fat splits, each a commonly-cited starting point, clearly labeled as illustrative rather than prescriptive.
- Custom mode, honestly validated — enter your own protein/carb/fat percentages and we check that they add up to 100%. If they don’t, we tell you and ask you to fix it — we never silently normalize your numbers behind your back.
- The math shown plainly — grams come from the Atwater factors (4 kcal/g for protein and carbs, 9 kcal/g for fat), named and explained right on the page.
- Shareable — your calorie target and diet style live in the link, so you can send an exact result to a coach, a training partner, or your future self.
Pair it with our calorie calculator to set the total first, or our protein intake calculator if you’d rather anchor on a research-informed protein range. As always: this is a general estimate, not personalized medical or nutrition advice.