% Weight Loss Percentage

Keto Calculator

Calculate your keto macros: 70% fat, 25% protein, 5% carbs. Get exact gram targets based on your daily calorie needs.

Keto Diet Calculator & Ketogenic Macros for Weight Loss

Our free keto diet calculator (also called a ketogenic calculator for weight loss or ketogenic diet calculator) establishes your personal macronutrient targets for nutritional ketosis. By calculating exact daily gram targets for net carbs, protein, and dietary fats based on your BMR and activity level, this keto macro calculator keeps your body primed for metabolic fat burning while preserving lean muscle.

The Ketogenic diet is a very low-carbohydrate, high-fat, moderate-protein eating plan. By restricting net carbohydrates to under 20-50 grams per day, you force your body to switch from burning glucose to burning ketones (derived from fat) for fuel.

This metabolic state, known as ketosis, suppresses appetite, stabilizes blood sugar levels, and accelerates fat burning. Hitting your daily macro targets is critical: typical ratios are 70% of calories from fat, 25% from protein, and 5% from net carbohydrates.

Our keto calculator determines your customized gram targets based on your energy expenditure and weight goals, helping you enter and maintain ketosis safely.

About this Calculator

Methodology & Formulas: This Keto calculator uses standard physiological formulas and evidence-based guidelines to provide accurate estimates.

Reviewed by: Dr. Rekha Kumar, M.D., M.S., Lead Medical Reviewer

Last Updated: August 2026

Sources & Citations: Guidelines from the NIH and CDC were consulted in the creation of this tool.

Disclaimer: This tool is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider.

Frequently Asked Questions

Q: What are net carbs?

Net carbs are total carbohydrates minus dietary fiber and sugar alcohols, representing the carbs that affect blood glucose levels.

Q: How long does it take to enter ketosis?

Most people enter ketosis in 2 to 4 days if net carbs are strictly limited to under 20-30 grams per day.

Scientific References & Clinical Guidelines

Related Clinical & Fitness Hubs

Formulas & Math

Challenge & Group Rules

Clinical & Safety Benchmarks