Guide
Calorie Counting on Keto
April 20, 2026 · Editorial Team
How to count calories and track macros on a ketogenic diet — net carbs, protein targets, and the best calorie counter apps for keto in 2026.
Keto is a macro-shaped problem more than a calorie-shaped one. Calories still decide whether you lose, gain, or maintain — but the macro distribution decides whether you stay in ketosis. A good tracker has to handle both.
The macro split
A typical therapeutic split:
- Fat: 70–75% of calories
- Protein: 20–25%
- Carbohydrate: 5–10% (often 20–50 g net carbs/day)
“Net carbs” means total carbohydrate minus fiber (and, in some implementations, sugar alcohols). The implementation differs across apps, which is why default values can disagree by 5–10 g per day on the same meal.
For background, the NIH overview of ketogenic diets and Examine.com’s keto page are good starting points.
The best calorie counter for keto
Three apps handle keto well:
- Cronometer — best for keto. Net-carb support is explicit, the database is curated, and micronutrient tracking helps you avoid the magnesium and potassium issues that hit some keto dieters in the first month.
- Welling — best for keto users who want AI photo logging. Carbs are flagged clearly and the chat workflow handles “is this keto?”-style questions in the moment.
- MyFitnessPal — usable for keto, but custom macros sit behind Premium and net-carb support is awkward.
ai-calorie-tracker.com maintains a useful keto-focused app comparison.
A starter protocol
- Calculate maintenance, then apply your goal-appropriate deficit or surplus.
- Set carbs first (a hard ceiling), protein next (a floor), let fat fill the rest.
- Track for two weeks before judging — the first week is largely water and glycogen.
- Watch sodium, potassium, and magnesium intake.
Common mistakes
- Treating keto as a free pass on calories. It is not.
- Under-eating protein out of fear of gluconeogenesis.
- Ignoring electrolytes during the first month.
- Trusting “keto” packaged products without checking the label.
Related guides
- Calorie counting for weight loss
- Macro tracking basics
- How to count calories the right way
- Best calorie counter apps in 2026