Intermitted Fasting Time Calculator

Calculate the hours when the intermittent fasting cycle ends with a simple fasting clock.

Calculate the next meal time

Enter the time of your last meal and select the duration of your fast in hours. The calculator will directly display the time of your next meal.

Weight Loss Conversion Table

Use the weight loss with intermittent fasting days conversion tables below to estimate weight loss based on the number of fasting days. Calculate your results to see the expected weight loss in both kilograms and pounds.

Fasting Days to Weight Loss (kg)

Fasting days	Weight loss (kg)
1 day	0.5 - 1.0 kg
2 days	1.0 - 2.0 kg
3 days	1.5 - 3.0 kg
4 days	2.0 - 4.0 kg
5 days	2.5 - 5.0 kg
6 days	3.0 - 6.0 kg
7 days	3.5 - 7.0 kg

Fasting Days to Weight Loss (lbs)

Fasting days	Weight loss (lbs)
1 day	1.1 - 2.2 lbs
2 days	2.2 - 4.4 lbs
3 days	3.3 - 6.6 lbs
4 days	4.4 - 8.8 lbs
5 days	5.5 - 11 lbs
6 days	6.6 - 13.2 lbs
7 days	7.7 - 15.4 lbs

It is important to know that the amount of weight lost during intermittent fasting depends, such as the amount of calories consumed during the feeding period, the level of activity and the metabolism. In addition, weight loss during fasting may be temporary and once normal eating is resumed it can be regained.

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Frequently Asked Questions

We've compiled the answers to the most common questions below. If your question isn't covered, or you need more info, or have feedback, please contact us.

What is intermittent fasting?

Intermittent fasting is an eating pattern that switches between periods of fasting and eating. Intermittent means; occurring at irregular intervals. It does not specify which foods to eat but rather when you should eat them.
Some benefits include weight loss, improved metabolic health, protection against disease, and increased lifespan.

Intermittent fasting methods

Intermitent fasting can be calculated in several ways, it depends on the length of the fasting period. These are the common methods:

16/8 method

Choose an 8-hour window for eating, such as 12:00PM to 8:00PM.
Fast for 16 hours, such as from 8:00PM to 12:00PM on the next day.

24-hour method

Choose a day to fast entirely, such as Monday. The next day you eat normally.

5:2 method

Eat normally for five days a week. Limit caloric intake to 500-600 calories for two days of the week.

Is intermittent fasting safe?

Yes, fasting is safe for most healthy people. However, it is important to talk to a health professional before starting any fasting plan to make sure it is safe and effective for you.

Can I exercise and drink fluids during intermittent fasting?

Yes, you can exercise during itermittent fasting. It is important to stay hydrated and not overdo it. You can drink water, tea, coffee, and other non-caloric beverages while fasting. Avoid drinks like soft drinks and juices, they are calorie containing.

What are good sources to read about intermittent fasting?

Varady, K. A. (2011). Intermittent versus daily calorie restriction: which diet regimen is more effective for weight loss?. Obesity reviews, 12(7), e593-e601.
Fasting and refeeding differentially regulate NLRP3 inflammasome activation in human subjects published on Journal of Clinical Investigation
Intermittent Fasting: Is the Wait Worth the Weight? Mary-Catherine Stockman, RD, LDN,1 Dylan Thomas, MD,1 Jacquelyn Burke, MS, RD,2 and Caroline M. Apovian, MD1
Patterson, R. E., Laughlin, G. A., Sears, D. D., LaCroix, A. Z., Marinac, C. R., Gallo, L. C., ... & Villaseñor, A. (2015). INTERMITTENT FASTING AND HUMAN METABOLIC HEALTH. Journal of the Academy of Nutrition and Dietetics, 115(8), 1203-1212.

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