Macro Calculator

About this tool

This calculator starts with a total daily energy expenditure (TDEE) value that you provide. Choose a goal adjustment of 500 kcal below TDEE, no adjustment, or 300 kcal above TDEE, then set protein, carbohydrate, and fat percentages with the sliders. The tool normalizes the selected percentages and converts calories to grams using 4 kcal per gram for protein and carbohydrate and 9 kcal per gram for fat. It does not estimate TDEE from body measurements, prescribe a diet, or account for medical conditions, allergies, or individual nutrition needs. Treat the result as a rough planning aid and consult a qualified dietitian or clinician for personalized guidance.

Why use it

• Evidence-based protein targets from current sports nutrition research.

• Four diet style presets covering most common approaches.

• Shows macros in grams, percentage, and calories for flexible tracking.

• Integrates with TDEE Calculator on this site for a complete workflow.

• Prioritizes protein in absolute grams per kg rather than as a calorie percentage, which is what current sports nutrition research supports.

• Privacy-first: your weight and calorie targets are processed in-browser, never sent or stored on any server.

How to use

1. Enter your TDEE or daily calorie estimate (800–6000 kcal/day).
2. Choose Lose weight, Maintain weight, or Gain muscle to apply the displayed calorie adjustment.
3. Adjust the protein, carbohydrate, and fat percentage sliders until their sum is 100%.
4. Review the resulting calories and gram targets.
5. Use the values as a planning starting point and adjust with qualified professional guidance when health conditions or special dietary needs apply.

When it helps

• Setting up macros for a new diet or cutting/bulking phase.
• Transitioning to a ketogenic or low-carb diet and needing gram targets.
• Tracking macros in a food app and needing specific daily targets.
• Comparing macro distributions across different diet approaches.
• Switching diet style (e.g., standard to keto) and needing fresh gram targets that match the new ratio.
• Coaching others and needing to quickly produce macro plans for different goal/weight combinations.

Examples

Tips

• Hit your protein target first every day — it is the most important macro for muscle retention during fat loss and growth during a bulk.
• Distribute protein into 3-5 meals of 30-50 g each rather than front-loading or back-loading the day for better muscle protein synthesis.
• Allow ±5% daily variance in carbs and fat without stressing — weekly macro consistency drives results, not perfect daily numbers.
• If you train fasted or do endurance work, shift more carbs to the meal immediately after training rather than spreading them evenly.
• Switch from grams to percentages mentally when eating out — most cuisines do not give you precise macro labels.
• Track for 2-3 weeks, then take a maintenance week at TDEE every 8-12 weeks to reset hunger hormones during a long cut.

Frequently Asked Questions

Glossary

Macro

Short for macronutrient — protein, carbohydrate, or fat. The three classes of nutrients that supply calories.

Protein (4 kcal/g)

Amino-acid-based macro essential for muscle repair, immune function, and enzyme production. Recommended 1.6-2.4 g/kg for active adults.

Carbohydrate (4 kcal/g)

Primary fuel for high-intensity exercise and brain function; stored as glycogen in muscles and liver.

Fat (9 kcal/g)

Most calorie-dense macro; required for hormone production, fat-soluble vitamin absorption, and cell membrane integrity. Minimum 0.5 g/kg for hormonal health.

Net carbs

Total carbohydrate minus fiber (and in some definitions sugar alcohols); used in keto and low-carb tracking.

Cut / Bulk / Maintain

Bodybuilding terms for fat-loss phase, muscle-gain phase, and weight-stable phase — each has different calorie and macro targets.

Ketosis

Metabolic state where the body burns ketones (from fat) as primary fuel instead of glucose; typically requires <50 g carbs/day for 3-5 days to enter.