Fitness

Instant, private, and free

Macro Calculator.

Calculate macronutrient ratios for your goals

On-device calculationNo signup
01

Set your values

Results update as you type.

Macronutrient Distribution

Macros are the three nutrients that supply your calories: protein, carbohydrate, and fat. This calculator divides a calorie target between them according to the diet style you choose.

An even split that suits most people and is easy to maintain.

Macro Distribution

2000

calories

Protein 25%
Carbs 45%
Fat 30%

Protein

125g

500 cal (25%)

4 calories per gram

Carbohydrates

225g

900 cal (45%)

4 calories per gram

Fat

67g

600 cal (30%)

9 calories per gram

Per-Meal Distribution

3 meals a day

  • Protein: 42g
  • Carbs: 75g
  • Fat: 22g

4 meals a day

  • Protein: 31g
  • Carbs: 56g
  • Fat: 17g

5 meals a day

  • Protein: 25g
  • Carbs: 45g
  • Fat: 13g
Total calories: 2000 cal

Total calories

2000 cal
Protein per lb of body weight: 0.8g/lb

Protein per lb of body weight

0.8g/lb
Fibre target: 28g

Fibre target

28g

Tips for Hitting Your Macros

  • Log your food for a few weeks to learn what your usual meals actually contain.
  • Preparing meals ahead makes hitting the targets far easier on busy days.
  • Build meals around whole foods; they are more filling per calorie.
  • Adjust the split if you feel flat in training or hungry all day.
  • Getting close most days beats hitting the numbers exactly some days.

A Guide to Macronutrients

Every calorie you eat comes from protein, carbohydrate, or fat (alcohol aside). How you divide your calories between them affects appetite, training, and how your weight changes.

The Three Macronutrients

  • Protein (4 calories per gram) supplies the amino acids used to repair and build tissue, including muscle. It is the most filling of the three.
  • Carbohydrate (4 calories per gram) is the body's preferred fuel for hard exercise and the main energy source for the brain.
  • Fat (9 calories per gram) supports hormone production and lets your body absorb vitamins A, D, E, and K.

Common Macro Ratios

Balanced (40% carbs / 30% protein / 30% fat)

Best for: general health, steady weight, and people new to tracking.

A middle-of-the-road split with no food group cut sharply. It leaves room for most cuisines, which makes it the easiest to stick with long term.

Low carb (25% carbs / 40% protein / 35% fat)

Best for: fat loss phases and people who feel better on fewer carbs.

Cutting carbs raises protein and fat, which many people find more filling. Expect harder high-intensity sessions in the first few weeks as your body adjusts.

High carb (55% carbs / 25% protein / 20% fat)

Best for: endurance athletes and high-volume training blocks.

More carbohydrate keeps muscle glycogen topped up, which matters most when sessions are long or frequent.

Ketogenic (5% carbs / 25% protein / 70% fat)

Best for: people specifically pursuing ketosis, ideally with medical guidance.

Carbs drop low enough that the body shifts to burning fat for fuel. It is restrictive, takes a few weeks to adapt to, and is worth discussing with a professional first.

How to Track Your Macros

  1. Set a daily calorie target that matches your goal.
  2. Choose a macro split and note your gram targets for each.
  3. Pick a food tracking app and log everything you eat for a full day.
  4. Weigh foods on a kitchen scale until you can judge portions by eye.
  5. Plan meals around your protein target first, then fill in carbs and fat.
  6. Review weekly averages and adjust rather than reacting to a single day.

Foods by Macronutrient

Protein sources

  • Chicken breast — 31g per 100g
  • Lean beef — 26g per 100g
  • White fish — 23g per 100g
  • Eggs — 13g per 100g
  • Greek yoghurt — 10g per 100g
  • Whey protein powder — 80g per 100g
  • Tofu — 8g per 100g

Carb sources

  • Rice — 28g per 100g cooked
  • Oats — 66g per 100g dry
  • Potatoes — 17g per 100g
  • Quinoa — 21g per 100g cooked
  • Wholegrain bread — 43g per 100g
  • Fruit — 10-25g per 100g
  • Beans — 23g per 100g cooked

Fat sources

  • Avocado — 15g per 100g
  • Nuts — 50g per 100g
  • Olive oil — 100g per 100g
  • Salmon — 13g per 100g
  • Nut butter — 50g per 100g
  • Coconut oil — 100g per 100g
  • Dark chocolate — 43g per 100g

Related Calculators

BMI Calculator

Calculate Body Mass Index and health status

Calorie Calculator

Calculate daily calorie needs for weight goals

Ideal Weight Calculator

Find your ideal weight based on multiple formulas

Protein Calculator

Calculate daily protein intake requirements

Body Fat Calculator

Estimate body fat percentage using measurements

One Rep Max Calculator

Calculate your one rep max and training percentages

FAQs

What are macros and why are they important?

Macros (macronutrients) are proteins, carbohydrates, and fats - the three main nutrients your body needs in large amounts. Tracking macros helps optimize body composition, energy levels, and fitness goals more effectively than counting calories alone.

What is a good macro ratio for weight loss?

A common macro ratio for weight loss is 40% protein, 30% carbs, and 30% fats. However, optimal ratios vary based on individual factors. Higher protein (40-50%) helps preserve muscle mass during calorie deficit.

How much protein do I need per day?

General recommendations are 0.8-1g per pound of body weight for active individuals, 1-1.2g for muscle building, and 0.6-0.8g for sedentary individuals. Our calculator provides personalized protein targets based on your goals.

Should I track macros or calories?

Both approaches work. Tracking macros is more precise and helps optimize body composition, while calorie counting is simpler. Beginners often start with calories, then progress to macro tracking for better results.

Cite this calculator

Canonical URL: https://mathify.one/en/fitness/macros

Cite as: Mathify. (2026). Macro Calculator. https://mathify.one/en/fitness/macros

Use Cases

Meal Planning for Fitness Goals

Use the macro targets to plan balanced meals that align with your daily calorie intake, whether you're aiming to lose fat, build muscle, or maintain weight.

Example: If your target is 2000 calories, the calculator might suggest 150g protein, 200g carbs, and 55g fat.

Tracking Daily Intake

Use the calculated macro targets as a reference when logging your food in a nutrition app, helping you stay on track with your diet.

Example: Check your protein intake against the target to ensure you're meeting your daily requirement.

Frequently Asked Questions

How does the macro calculator split my daily calories?
The calculator takes your daily calorie intake and divides it into three macronutrient targets: protein, carbohydrates, and fat. It uses standard percentages or ratios to allocate calories to each macro, giving you a balanced plan.
What are macronutrients and why are they important?
Macronutrients are the three main nutrients your body needs in large amounts: protein, carbohydrates, and fat. Each provides energy (calories) and plays a specific role in muscle repair, energy supply, and hormone function. Balancing them helps you meet fitness goals.
Can I adjust the macro split to fit my goals?
Yes, the calculator provides a default split, but you can adjust the percentages or ratios based on your specific needs, such as higher protein for muscle building or lower carbs for weight loss. Always consult a professional for personalized advice.

Tips & Common Mistakes

Tips

  • Enter your daily calorie intake accurately for the most precise macro targets.
  • Adjust the macro ratios based on your activity level and fitness goals.
  • Use a food scale to measure portions for more accurate tracking.
  • Re-evaluate your macro targets as your weight or activity level changes.

Common Mistakes to Avoid

  • Using a calorie intake that is too low or too high, which can lead to unrealistic macro targets.
  • Ignoring the importance of micronutrients and fiber while focusing only on macros.
  • Not adjusting macro targets as your body composition changes.

Last updated: August 13, 2026