Fasting Calculator

This fasting calculator helps you calculate your next meal time considering your last meal and fast duration.

You can enter your last meal time and fast duration in hours to calculate your next fasting meal time.

If you want to go for intermittent fasting, use this IF calculator instead.

Fasting Calculator

You might also want to calculate the calories burned by slow or fast heart rate.


Azizi, F. (2010). Islamic fasting and health. Annals of Nutrition and Metabolism, 56(4), 273-282.

Paoli, A., Tinsley, G., Bianco, A., & Moro, T. (2019). The influence of meal frequency and timing on health in humans: the role of fasting. Nutrients, 11(4), 719.

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