What macro split does this keto calculator use?

Typical keto targets are ~5–10% carbs (often 20–50 g/day), 20–30% protein, and 60–75% fat. This tool lets you set carb grams and protein target, then budgets fat from remaining calories.

Are these results medical advice?

No. Results are general estimates. Consult a healthcare professional, especially if you have medical conditions or take medication.

Where is my data stored?

Your entries and saved results are stored locally in your browser (localStorage). Images are processed locally and not uploaded to servers.

Keto Diet Calculator

Enter your details and goals to get tailored keto calories and macro targets — with an animated donut meter and actionable tips.

Name (Optional)

Upload Image (Optional)

Sex

Age (years)

Height (cm)

Weight (kg)

Body fat % (optional)

Activity level

Goal

Calorie offset (%)

Carb target (g/day)

Typical keto: 20–50 g/day.

Protein method

Protein value

If “fixed”, enter total grams; otherwise grams/kg.

Your personalized keto calories & macros will appear here.

Keto Calculator — Guidance & FAQ

How are calories calculated?

BMR uses Mifflin–St Jeor, multiplied by an activity factor to get TDEE; then a goal % offset is applied.

How are macros decided?

You set daily carbs and protein target; remaining calories go to fat. 1 g carbs = 4 kcal, 1 g protein = 4 kcal, 1 g fat = 9 kcal.

Protein per kg or lean mass?

If body fat % is known, lean-mass targeting is more precise; otherwise per-kg body weight is fine for most users.