Macro Calculator
Split your calories into carbs, protein, and fat
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Carbs (g)—
Protein (g)—
Fat (g)—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- 2200 kcal, balanced 40C / 30P / 30F → Carbs 220 g · Protein 165 g · Fat 73 g
- 2,200 kcal, high-protein goal → Protein 220 g, carbs 165 g, fat ≈ 73.3 g
Formula
Carbs and protein deliver 4 kcal/g, fat 9 kcal/g. Multiply total calories by the chosen split, then divide each by its kcal-per-gram factor.
About Macro Calculator
Split your calories into carbs, protein, and fat. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.