Macro Calculator (Singapore)
Get personalized macronutrient targets for cutting, maintaining, or bulking. Adjusts protein, carbs, and fat based on your TDEE and goal.
How to Track Macronutrients for Body Composition
Macronutrients, or macros, are the nutritional building blocks of your diet: proteins, carbohydrates, and fats. While total calorie intake determines whether you lose or gain weight, your macro distribution dictates whether that weight change comes from fat or muscle.
Each macronutrient has a specific role and caloric value: protein provides 4 calories per gram and preserves muscle mass; carbohydrates provide 4 calories per gram and fuel workouts; fats provide 9 calories per gram and support hormone health.
Customizing your macronutrient ratios allows you to target specific fitness goals. For example, a ketogenic diet requires high fat and minimal carbs, while muscle growth requires elevated protein and moderate carbohydrates. Our calculator makes it easy to set and track these targets.
Frequently Asked Questions
Q: What is the best macro ratio for weight loss?
A common macro split for fat loss is 30% to 40% protein, 30% to 40% carbohydrates, and 20% to 30% fats. Hitting your protein target is the most important factor.
Q: How many calories are in macros?
Protein and carbohydrates contain 4 calories per gram, while fats contain 9 calories per gram.
Medically reviewed by Dr. Rekha Kumar, M.D., M.S. — Lead Medical Reviewer · Last reviewed: September 2026 · Updated: 2026-09-15
Evidence & references
This tool is for informational purposes only and is not a substitute for professional medical advice.
Frequently asked questions
Is this calculator free to use?
Yes. Every calculator on Weight Loss Percentage is free, with no sign-up or account required.
How accurate is the result?
Results depend on the accuracy of what you enter and the published formulas the tool uses, which follow standard guidance from national health authorities. Track the trend over weeks rather than relying on a single reading.
How often should I check it?
Check whenever your weight, activity or goals change — for most people once a week is enough to see a reliable trend.
Who reviews the content on this site?
All medical and nutrition content is written and reviewed by Dr. Rekha Kumar, M.D., M.S., our lead medical reviewer, and cites guidance from U.S. federal health sources such as the CDC and NIH.