Updated
Using Keto calculator
Calculate the fat grams left in a keto-style macro budget after your chosen net carbs and protein.
Uses 4 kcal per gram of net carbohydrate and protein, and 9 kcal per gram of fat. Net carbs, protein and energy targets are supplied by you; the calculator does not prescribe a diet or establish ketosis. Fiber, sugar alcohols, alcohol and food-specific energy factors are excluded. Medical ketogenic diets and diabetes medicines need individualized clinical guidance.
A worked example
For daily energy budget chosen with your care plan (kcal) = 2000, chosen net carbohydrate amount (grams) = 25, chosen protein amount (grams) = 100, fat remaining (grams) = 166.666667.
Before you use the result
Uses 4 kcal per gram of net carbohydrate and protein, and 9 kcal per gram of fat. Net carbs, protein and energy targets are supplied by you; the calculator does not prescribe a diet or establish ketosis. Fiber, sugar alcohols, alcohol and food-specific energy factors are excluded. Medical ketogenic diets and diabetes medicines need individualized clinical guidance.
Example results for daily energy budget chosen with your care plan (kcal)
These examples use Chosen net carbohydrate amount (grams): 25; Chosen protein amount (grams): 100. They are reference calculations, not recommended settings.
| Daily energy budget chosen with your care plan (kcal) | Fat remaining (grams) |
|---|---|
| 1000 | 55.555556 |
| 2000 | 166.666667 |
| 4000 | 388.888889 |
Cite this page
ToolOctopus. “Keto calculator.” Updated 2026-09-29. https://tooloctopus.com/keto-calculator.
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