Mr Calcu | Quickly check your ketone levels to stay on track with fat-burning and keto goals—no guesswork, just clarity.

Estimate and optimize your ketone levels instantly. Boost your keto results with data-driven precision and feel confident on your fat-burning journey.

Ketone Level Estimator

mmol/L

mg/dL

Glucose Level (mmol/L)

β-Hydroxybutyrate (BHB) Level (mmol/L)

Diet Duration (days)

30 days

Ketone Level Estimator Guidelines

You’ve got this—follow these steps to get accurate results:

Input Instructions

Enter your blood glucose in mmol/L or mg/dL
Enter your blood ketone level in mmol/L
If using mg/dL for glucose, use the conversion: 1 mmol/L = 18 mg/dL

Calculation Method

The calculator uses the formula:

GKI = Glucose (mmol/L) / Ketones (mmol/L)

Interpretation Tips

Use readings from a fasted state (e.g., in the morning)
Aim for a GKI suited to your goal: deep ketosis for therapy, moderate for weight loss
If ketones exceed 7.0 mmol/L or you feel unwell, consult a healthcare provider

Ketone Level Estimator Description

What Are Ketone Bodies?

Ketone bodies are produced by the liver during periods of low carbohydrate intake, fasting, or prolonged exercise. The main types are:

Beta-hydroxybutyrate (BHB): Most commonly measured in blood tests.
Acetoacetate (AcAc): Detected in urine strips.
Acetone: Measured in the breath.

The Glucose-Ketone Index (GKI)

GKI is a key metric that compares glucose and ketone concentrations to assess metabolic state.

GKI = (Glucose in mmol/L) / (Ketones in mmol/L)

GKI Interpretation Guide:

< 1: Deep therapeutic ketosis
1–3: Targeted therapeutic range (e.g. for epilepsy or cancer therapy)
3–6: Nutritional ketosis, effective for fat loss
6–9: Low-level ketosis
> 9: Minimal to no ketosis

Pro Tip: Use consistent timing (e.g., morning fasted state) when measuring glucose and ketones to get comparable GKI values.

Edge Case Considerations

1. Post-Exercise Ketosis

Intense workouts increase fatty acid oxidation, temporarily raising ketone levels even with moderate carb intake.

2. Dawn Phenomenon

Hormonal surges in the early morning elevate glucose levels, possibly inflating GKI inaccurately.

3. Fasting-Induced Hyperketonemia

Prolonged fasts (over 72 hours) can lead to BHB levels exceeding 7.0 mmol/L. Monitor under supervision.

4. Diabetic Ketoacidosis (DKA)

Ketone levels above 5.0 mmol/L with glucose > 13.9 mmol/L may indicate DKA in type 1 diabetics — a medical emergency.

5. Alcohol-Induced Ketosis

Ethanol metabolism can produce ketones even if carb intake is high, potentially misleading GKI interpretation.

Case Studies

Case 1: Endurance Athlete

Mark, age 35, follows a cyclical keto diet with high-carb days. Despite consuming 100g carbs post-training, his ketones remain at 1.8 mmol/L the next morning due to glycogen depletion.

Case 2: Pediatric Ketosis for Epilepsy

Lena, age 12, on a 4:1 ketogenic protocol for seizure control, maintains a steady GKI of 1.2 — aligning with a 75% reduction in seizure frequency.

Further reading: NCBI on Ketogenic Diets.

Start tracking smarter and take control of your keto journey—try the calculator now!

Example Calculation

Parameter	Value
Glucose Level	5.5 mmol/L
Ketone Level	1.2 mmol/L
GKI	4.58
Status	Moderate Ketosis
Edge Case	None detected

Frequently Asked Questions

A high-fat, low-carbohydrate, moderate-protein diet that puts the body into a state of ketosis.

Ketone levels can be measured using blood meters (most accurate), urine strips (early phase), or breath analyzers (acetone detection).

GKI is calculated as Glucose (mmol/L) divided by Ketones (mmol/L). It is used to quantify the depth of ketosis, especially in therapeutic settings.

Dietary fat/carb intake, fasting duration, physical activity, insulin sensitivity, hormonal fluctuations, and hydration all influence ketone production.

Not always. In people with type 1 diabetes, high ketones with high glucose may indicate ketoacidosis. Non-diabetics generally regulate ketones safely, but levels above 7.0 mmol/L warrant caution.

Circadian rhythms, meal timing, cortisol spikes (dawn phenomenon), and overnight fasting all affect blood glucose and ketone concentrations.

For weight loss, a ketone range of 0.5–3.0 mmol/L is generally effective and indicates mild to moderate nutritional ketosis.