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Keto Carb Limit Calculator

Find your personalized daily net carb target for the ketogenic diet

Keto
Low-Carb
Nutrition
Diet

Your Details

Standard Keto (SKD): Typically 20–30g net carbs/day

About This Tool

The Keto Carb Limit Calculator helps you determine the ideal daily net carb intake for your body and lifestyle on a ketogenic diet. It uses the Mifflin-St Jeor equation to estimate your basal metabolic rate, then adjusts for activity and goals to produce a personalized macro breakdown.

Tracking net carbs is essential on keto — staying within your limit helps your body enter and maintain ketosis, a metabolic state where fat becomes your primary fuel source. Pair this with our Macronutrient Calculator for a complete nutritional overview, or use the Sugar Intake Calculator to identify hidden sugars that could knock you out of ketosis.

All calculations happen 100% in your browser. No personal or health data is ever sent to any server. For a broader look at your daily energy needs, try our Daily Calorie Needs Calculator.

Frequently Asked Questions (FAQ)

How many carbs can I eat on keto?
Most people on standard keto aim for 20–30 g of net carbs per day. Net carbs = total carbs minus fiber. Your exact limit depends on your body stats, activity level, and metabolic health. This calculator provides a personalized target based on your inputs.
What is the difference between total carbs and net carbs?
Total carbs include all carbohydrates in food. Net carbs subtract fiber (and sometimes sugar alcohols) because they don't significantly impact blood sugar. On keto, you track net carbs because fiber doesn't kick you out of ketosis.
Will I lose weight faster with fewer carbs?
Going very low carb (under 20 g net) can accelerate initial ketosis but isn't necessarily better long-term. Sustainability matters more than strictness. Use our Daily Calorie Needs Calculator to ensure you're in a healthy caloric deficit.
How do I know if I'm in ketosis?
Signs include reduced appetite, increased energy, fruity breath, and weight loss. For confirmation, you can measure blood ketone levels (0.5–3.0 mmol/L indicates nutritional ketosis). Urine strips are less accurate but useful for beginners.
Can I exercise on keto?
Yes. If you're very active, consider the moderate low-carb option (30–50 g net carbs) to fuel workouts. Athletes may benefit from targeted or cyclical keto approaches. Track your macronutrient ratios to balance performance and ketosis.
Is my data stored or sent anywhere?
No. All calculations run entirely in your browser. No personal or health data is ever sent to any server.

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