Ketosis calculator
Your last meal and the hours since you ate it determine the expected blood ketone range for now and each fasting milestone.
Each fasting milestone and the ketones to expect
| Hours since last meal | Expected blood ketones (mmol/L) | Middle | Stage |
|---|---|---|---|
| 12 h | 0.2–0.5 | 0.3 | Light ketosis |
| 16 h | 0.2–0.8 | 0.4 | Light ketosis |
| 18 h | 0.3–1 | 0.5 | Light nutritional ketosis |
| 24 h | 0.5–1.5 | 0.9 | Light nutritional ketosis |
| 36 h | 0.8–2 | 1.3 | Nutritional ketosis |
| 48 h | 1.2–2.5 | 1.7 | Nutritional ketosis |
| 72 h | 2–4 | 2.8 | Deep ketosis |
These figures follow a moderate meal, with no exercise and no keto adaptation. Your answers make the calculator adjust the hours.
Hours until ketosis, based on your last meal
| Carbs in the last meal | Hours to 0.5 mmol/L | Hours to 1 mmol/L |
|---|---|---|
| High carb | 21 h | 32 h |
| Moderate | 17 h | 28 h |
| Low carb | 14 h | 25 h |
| Keto | 11 h | 22 h |
These values sit in the middle of the expected range, with no exercise and no keto adaptation.