Health calculator
Keto Calculator - Net Carbs, Protein and Fat
Plan keto-style macros by setting daily calories, net carbs, and protein, then assigning remaining calories to fat grams.
FormulaFat grams = (calories - net carbs x 4 - protein grams x 4) / 9
Formula
Keto macro allocation
Keto macro results are planning estimates only and are not medical ketogenic diet guidance.
Fat grams = (calories - net carbs x 4 - protein grams x 4) / 9
2,000 kcal with 25 g net carbs and 120 g protein leaves about 157.8 g fat.
SourcesThis calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
Sources and assumptions
Source notes
This calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
- Effective year
- Current rules
- Last verified
- 2026-06-18
Keto macro results are planning estimates only and are not medical ketogenic diet guidance.
Official and reference sources
Assumptions
- Net carbs and protein are entered directly in grams.
- Carbohydrate and protein are converted at 4 kcal per gram.
- Fat is converted at 9 kcal per gram and receives the remaining calories.
Not included
- Medical ketogenic therapy, diabetes medication adjustment, fiber calculation, electrolytes, meal plans, micronutrients, pregnancy, kidney disease, and clinical nutrition guidance.
FAQ6 common questions for this calculator.
FAQs
What are net carbs?+
Net carbs commonly refer to carbohydrates counted after subtracting fiber or other non-digestible components, depending on the tracking method you use.
Is this safe for diabetes or medical keto?+
Do not use this as medical guidance. Diabetes, medication, pregnancy, kidney disease, and therapeutic ketogenic diets should be managed with qualified clinicians.
How does the Keto Calculator calculate the result?+
For the Keto Calculator, it uses the Keto macro allocation: Fat grams = (calories - net carbs x 4 - protein grams x 4) / 9. 2,000 kcal with 25 g net carbs and 120 g protein leaves about 157.8 g fat.
What information do I need to use the Keto Calculator?+
Enter the body, activity, serving, or nutrition values requested by the form. Use the same unit system throughout so the Keto Calculator result is comparable.
How accurate is the Keto Calculator?+
Keto Calculator is only as accurate as the body measurements and activity details entered. It applies the Keto macro allocation shown on this page, then rounds for readability. Treat the output as screening guidance rather than a diagnosis.
What should I check before using the Keto Calculator result?+
For the Keto Calculator, check the body measurements and activity settings, unit choices, and whether the calculator's assumptions fit the person being assessed. Use the result as screening or planning context, not as a diagnosis.
RelatedNearby health calculators for the next step after Keto Calculator.
Health guide
How to use the Keto Calculator
Plan keto-style macros by setting daily calories, net carbs, and protein, then assigning remaining calories to fat grams. The page also explains the keto macro allocation and shows a practical example: 2,000 kcal with 25 g net carbs and 120 g protein leaves about 157.8 g fat.
- 1
Enter your details
Enter the values for the keto calculator scenario you want to check.
- 2
Check the calculation
Review the result alongside the keto macro allocation: Fat grams = (calories - net carbs x 4 - protein grams x 4) / 9.
- 3
Compare scenarios
Change one or more inputs to see how they affect the keto Calculator result before you use the estimate.