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Fasting & Diet

Ketosis Onset Estimator

Estimated hours to ketosis from current carb intake.

Inputs
150 g
0100200400
Approximate. Glycogen stores burn off proportional to carb intake.
Estimated time to ketosis
44hours
From now
~44 h
In days
1.8days
Heads-up
Real ketone production varies by individual liver function and metabolism.
It's an estimate

More fasting & diet tools

Fasting Window Calculator
Eating + fasting windows for 16:8, 18:6, OMAD, and more.
Keto Macros
Daily protein/fat/carb targets for a ketogenic diet.
Refeed Day
Carb amount for a planned refeed during a cut.
Hydration
Daily water target by weight, climate, and activity.

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