Intermittent Fasting Calculator: Leangains Protocol

An Ultimate Calculator for an Ultimate Lifestyle.

Leangains IF calc v4.0 damnripped

The IF calculator is first Intermittent Fasting calculator of its kind. You will never find a fasting calculator so sophisticated in the whole wide web especially one dedicated solely for The Leangains Protocol. We developed the IF calculator to be the most accurate and easy to use fasting calculator for people following Intermittent Fasting for fat loss or muscle building. Hell, even Martin Berkhan will be amazed.

IF Calculator Version 4.0 is here.😍

This version comes with a brand new tool called the PDF Generator. This handy little tool is armed with a much requested feature. It lets you download a snapshot of the whole calculator along with all your details & results. The most exciting part is that you can choose to include your Name (or your friend’s), Date and a Message which will be printed in the downloaded PDF. This will be of tremendous help to everyone (especially Personal Trainers) as you don’t have to remember each and every single mind numbing detail regarding your fitness journey. Just open the PDF and everything’s right there. 😉

Not just this, we are already working on a few more features. So keep your eyes peeled for the future updates. Now go on, give this beast a try!



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If you happen to encounter any bugs or if you have any suggestions, please let us know in the comments section. Thanks.


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Rachel A
Rachel A

Hi there, I tried downloading as a png to my phone and the picture that it gave me ended up only having certain parts filled out even though I filled in every part. To be more specific I entered in start time at 8 p.m., I’m female I chose three meals a day and the fat loss rest work split. Instead of all that it had start time at 1 a.m., mail protocol, one meal a day and select an option for the rest work split. Everything else still looks right like training at 9am and all that jazz, just… Read more »


I should mention that I tried it on my computer and it worked fine


Thanks for the guide! Got a few questions to ask,
My BMR shows 1633 calories and I’m trying to cut, why do I need to take 2000 calories on rest days? And if I were to take casein before bed and is outside of eating window, will it stops the fast?


Hey ,

The calculator is great , and according to it i have to consume 1500 cal post workout . But i dont know how cause that is too much . especially consuming 120 gms of protein . can we also have sample foods for our meals or some suggestions you have ?

And also i thought you body cant absorb more than 40 gms of protein at a time . Is that wrong ?

Looking forward for your revert ,



This is an excellent calculator page, thanks for putting in the work DR


This is amazing! Thank you.

How does the body comp work. Is the expectation, I will lose fat and replace the weight with muscle? It would be helpful if there were descriptions for each of the rest / workout split options.


so, i’m on IF for a month now lost around 7kgs but i could never eat all my TDEE, im always short on protein, knowing that i don’t excercise as i work until 6 then i gotta go home play with my 2 kids…should i just take protein supplemnt?i only eat 2 meals, i dont feel hungry after 5pm which is my cutoff time

Aimee Reyes
Aimee Reyes

If bcaa spikes insulin, why would you want to drink it outside of your eating time frame?


How should calories be divided between the meals on rest days? Evenly? Or using the same percentages as for the workout days (e.g., 60%, 20%, 20%)?

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