Macro Calculator For Weight Loss

Calculate your daily macronutrient needs for weight loss based on your body metrics, activity level, and weight loss goal.

isCalculator Editorial Team Published by:
Reviewed by: Review Board
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How to use this tool?

How to Use the Macro Calculator for Weight Loss

  1. Enter your details: Fill in your age (10–120 years), weight (kg, 1–300), and height (cm, 100–250). Select your gender and activity level from the dropdowns.
  2. Choose your goal: Pick a weight loss pace: Mild (0.25 kg/week), Moderate (0.5 kg/week), or Aggressive (1 kg/week).
  3. Calculate: Click the Calculate Macros button. If any input is invalid, an error message will appear—correct it and try again.
  4. Read your results: Your daily targets for calories, protein, carbs, and fat are displayed. Below, you’ll see the breakdown: BMR, TDEE, daily deficit, and macro percentages.
  5. Apply the numbers: Use these values to plan your meals. The calculator uses metric units (kg, cm) and adjusts macros based on your weight and calorie goal.

Tip: If your calculated calories drop below 1200, it’s automatically set to 1200 for safety.

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Frequently Asked Questions

It calculates your daily macronutrient needs (protein, carbs, fat) based on your body metrics, activity level, and weight loss goal, helping you structure your diet.

It uses the Mifflin-St Jeor equation for BMR and adjusts for activity and deficit. Individual variations may occur; consult a professional for personalized advice.

This calculator is specifically for weight loss. For maintenance, set goal to 0; for gain, use a surplus calculator.

Reviewed by Experts

Anita Leonor F. Jaime

Anita Leonor F. Jaime

Physician

Dedicated Occupational Physician with experience in Occupational Medicine and emergency care. Proficient in health assessments, hygiene management, and compliance with safety standards. Committed to promoting occupational health and improving workplace quality of life.

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Dr. Leonilde Melgaço

Dr. Leonilde Melgaço

Medical Doctor

Primary health care and Assistant Physician in Occupational Medicine

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Dr. Zouheir Ballouk

Dr. Zouheir Ballouk

Doctor

Medical Doctor Phd

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Layla Nesr

Layla Nesr

Nutritionist

Bachelor’s Degree, BS in Nutrition and Dietetics

LinkedIn
Neil Chaves

Neil Chaves

Doctor

Dentist

LinkedIn
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