Enter the duration of the fast in hours into the calculator to calculate the duration of a 36-hour fast.

36 Hour Fast Formula

The following formula is used to calculate the duration of a 36-hour fast:

D = 36


  • D is the duration of the fast in hours

To calculate the duration of a 36-hour fast, simply assign the value of 36 to the variable D.

What is a 36 Hour Fast?

A 36-hour fast is a form of intermittent fasting that involves abstaining from all forms of food and calorie intake for a full 36 hours. This means that if you finish your last meal at 8 PM, you will not eat again until 8 AM two days later. During this period, you can only consume non-caloric beverages such as water, black coffee, or tea. The purpose of a 36-hour fast is to put your body into a state of ketosis, where it begins to burn stored fat for energy instead of relying on the immediate energy from food. This can lead to weight loss, improved metabolic health, and even potentially increased longevity. It’s important to note that this type of fasting should be done under medical supervision, as it can have side effects and may not be suitable for everyone.

How to Calculate 36 Hour Fast?

The following steps outline how to calculate the duration of a 36 Hour Fast.

  1. First, determine the starting time of the fast.
  2. Next, add 36 hours to the starting time.
  3. Finally, calculate the ending time of the fast.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Starting time of the fast: 8:00 AM

Duration of the fast: 36 hours