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Macro Calculator

Turn your calories into grams of protein, carbs and fat, then split them across your meals. Pick a style, set your own mix or start with protein.

  • Free
  • No sign-up
  • Stays on your device
  • 3, 4 or 5 meals
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Pick a normal week, not your best one. Between two? Choose the lower.

Advanced options (formula, body fat, kilojoules)
Formula

Needed for Katch-McArdle. Don’t know it? Try the body fat calculator.

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Private: your numbers stay on this device unless you choose to share them.

Your macros

Fill in your details and tap Calculate to see your daily calories and grams of protein, carbs and fat.

Good to know: These are estimates for general wellness, not medical advice. They’re made for healthy adults: if you’re pregnant or breastfeeding, under 18, have a medical condition or follow a diet your doctor prescribed, talk to your doctor or a licensed dietitian first.

Learn

Macros, in plain English.

What are macros?

Macros (macronutrients) are the three things in food that give you energy:

  • Protein (4 calories per gram) builds and repairs muscle and keeps you full.
  • Carbohydrates (4 calories per gram) are your body’s favorite fuel for training and your brain.
  • Fat (9 calories per gram) supports your hormones and helps you absorb vitamins A, D, E and K.

Calories decide whether your weight goes up or down. Macros shape how you feel, how you perform and how much muscle you keep.

Choosing a style

StyleProtein / carbs / fatGood for
Balanced25 / 45 / 30A flexible everyday mix
Higher protein35 / 35 / 30Fat loss or building muscle
Lower carb35 / 25 / 40People who feel better with fewer starches
Lower fat25 / 55 / 20Lovers of grains, fruit and beans
Keto25 / 5 / 70Very low carb; check with your doctor first
Plant-forward20 / 55 / 25Mostly beans, lentils, tofu and grains
Endurance20 / 55 / 25Runners, cyclists and long training days

The best split is the one you can keep up week after week.

Protein first

Many coaches set protein first, by body weight, because it matters most for keeping and building muscle. A common target when you train regularly is about 0.7 to 1 gram per pound (1.6 to 2.2 g per kg). Then they set fat, often 25 to 35 percent, and let carbs fill the rest.

Use Protein first above to try it. Carbs never go below zero; if the numbers don’t fit, lower the fat or protein a little.

Tips for hitting your numbers

  • Build each meal around a palm-sized portion of protein.
  • Fill half your plate with vegetables or fruit for fiber.
  • Close is good enough: within 5 to 10 grams is fine, and the weekly average matters most.
  • Track for a couple of weeks to learn portions, then go by feel.

How Josh uses numbers like these

Josh Nair coaching a live workout, smiling

Numbers help, but they’re only part of the story. Josh coaches mindset first (he says it’s about 60 percent of the work), then consistency, with lots of variety so training stays fun.

He lost 62 pounds himself in his early 50s, so he knows the hard part isn’t the math. It’s showing up on busy days and getting back on track after a slip. He helps you turn targets like these into simple daily habits that fit real life.

For a personal eating plan or a medical diet, Josh will point you to your doctor or a licensed dietitian.

Questions

Good questions, honest answers.

What macro split is best for weight loss?

There’s no single best one. Your calorie total drives weight loss. A higher-protein split (around 30 to 35 percent protein) often helps you stay full and keep muscle, but the right split is the one you can stick with.

How much protein do I need?

Most active adults do well with about 1.2 to 1.6 grams per kilogram of body weight, and 1.6 to 2.2 g/kg when building muscle or losing fat. Our protein calculator gives you a personal range.

Do I have to hit my macros exactly?

No. Being within 5 to 10 grams is great, and your weekly average matters more than any single day.

Calories or macros: which matters more?

Calories decide weight change. Macros decide what that change is made of (fat or muscle) and how you feel and perform. Get calories roughly right first, then protein, then the rest.

Is keto safe?

Keto can work for some people, but it’s very restrictive and isn’t right for everyone. If you have diabetes, kidney or heart conditions, or take medication, talk to your doctor before trying it.

Can I use this if I’m pregnant, breastfeeding or under 18?

Please don’t rely on it. These estimates are for healthy adults. If you’re pregnant or breastfeeding, under 18, have a medical condition or follow a diet your doctor prescribed, talk to your doctor or a licensed dietitian first.