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Intermittent fasting calculator

In the 16:8 protocol you eat within an eight hour window and fast for sixteen. With a last meal at 8 pm the window reopens at noon the next day. Water, black coffee and unsweetened tea are allowed while fasting. The 14:10 and 18:6 schemes follow the same logic.

Calculate

Eating window

12:00 - 20:00

Fasting hours
16
Window hours
8
Suggested meals
3
First meal
12:00

Formula and source

Window reopening = last meal hour plus the protocol's fasting hours. The window covers the remaining hours of the day and should hold two or three complete meals.

Source: Time restricted eating reviews published in Annual Review of Nutrition and the New England Journal of Medicine.

Frequently asked questions

Does intermittent fasting burn more fat?

At equal calories results are similar to a standard diet. The advantage is practical: a narrow window cuts unplanned snacking.

Who should avoid it?

It is not advised during pregnancy or breastfeeding, in children and teenagers, with treated diabetes, or with a history of eating disorders.

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dietai è uno strumento organizzativo ed educativo. Non elabora piani alimentari personalizzati, non gestisce patologie, gravidanza, allattamento, allergie o intolleranze diagnosticate e non sostituisce la valutazione di un dietista, di un nutrizionista o di un medico.

Le stime di calorie e macronutrienti sono generate da un sistema di intelligenza artificiale (AI Act, Reg. UE 2024/1689): hanno un margine tipico del 10–20% e vanno intese come ordine di grandezza, non come valori da laboratorio.

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