Protein · Carbs · Fat

Macro Calculator for Bulking

Free bulking macro calculator — protein, carbs and fat targets for your muscle building phase, updated instantly.

No signup required Muscle gain macro split Instant results

Get yours from the TDEE Calculator

Your daily macro targets
Protein
—
grams
 
Carbs
—
grams
 
Fat
—
grams
 
P
C
F
Protein Carbs Fat
Per-meal breakdown
Protein
—g
Carbs
—g
Fat
—g
Results are estimates for informational purposes only. Not medical advice. Consult a healthcare professional for personalised guidance. Higher carbs (50% on standard muscle gain) fuel training performance and support muscle glycogen during a bulk. Keep protein at minimum 2g per kg bodyweight.

How This Bulking Macro Calculator Works

A bulking macro calculator needs to do two things — first account for your maintenance TDEE, then split the total calories into muscle-building macros.

This bulking macro calculator:

  1. Takes your calorie target (get your TDEE from the TDEE Calculator and add your chosen surplus)
  2. Splits total calories into 30% protein, 45% carbs, 25% fat on the Standard Muscle Gain preset
  3. Shows exact gram targets for each macro plus per-meal breakdown
Example — 80kg male, TDEE 2,800 kcal, standard bulk (+500 kcal = 3,300 kcal target) Protein (30%): 990 kcal ÷ 4 = 248g protein
Carbs (45%): 1,485 kcal ÷ 4 = 371g carbs
Fat (25%): 825 kcal ÷ 9 = 92g fat

Carbs Are Critical for Bulking

Carbohydrates replenish muscle glycogen that fuels resistance training, trigger an insulin response that supports muscle protein synthesis, and spare protein from being used as energy. Aim for complex carbs like rice, oats, potatoes and pasta timed around training sessions.

Use the macro calculator with the Muscle Gain goal to see your full bulking macro breakdown. Combine with the calorie deficit calculator to find your precise surplus target.

Related Calculators

TDEE Calculator
Find your maintenance TDEE — add your surplus to get your bulk calorie target.
Macro Calculator
The full macro calculator with all diet and goal presets.
Calorie Deficit Calculator
Plan your cut phase after bulking — set your deficit target precisely.
TDEE Calculator for Bulking
Get your maintenance TDEE with lean, standard and aggressive bulk targets built in.

Frequently Asked Questions

What should my macros be for bulking?+
For bulking aim for 30% protein, 45–50% carbs and 20–25% fat. Higher carb intake fuels training performance and replenishes muscle glycogen. This bulking macro calculator sets these ratios automatically based on your calorie target.
How many calories above TDEE should I eat when bulking?+
A lean bulk uses 250–500 kcal above TDEE producing 0.25–0.5kg weight gain per week with minimal fat. An aggressive bulk uses 500–750 kcal for faster but fatter gains. Most people get the best long-term results from a lean bulk of 250–350 kcal above maintenance.
How important are carbs for bulking?+
Carbs are critical for bulking. They replenish muscle glycogen that fuels resistance training, trigger an insulin response that supports muscle protein synthesis, and spare protein from being used as energy. Aim for complex carbs like rice, oats, potatoes and pasta timed around your training sessions.
Should I track macros or just calories when bulking?+
Track both. Calories determine your surplus. Macros determine the quality of weight gained. Without tracking macros you may miss your protein target which limits muscle growth or eat too much fat which adds unnecessary body fat during the bulk.
How long should a bulk last?+
Most bulking phases last 3–6 months. Bulk until body fat reaches 15–18% for men or 25–28% for women then transition to a cut. Avoid bulking indefinitely as excess body fat makes the subsequent cut longer and harder.