How To Set Your Calorie Deficit For Fat Loss (AVOID These Mistakes)



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How to set your calorie deficit for fat loss? What’s the best way to determine how much you should eat? Here’s the answer.

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When we look at the hierarchy of what makes up a successful fat loss diet, it’s obvious that calorie intake is the most important factor.

Without a caloric deficit, we can’t maximize fat loss. This has repeatedly been shown in research:

And if you’re interested in learning more in-depth about the energy balance equation I suggest checking out a great blog post by Lyle McDonald at

Now, the question is, how do you determine how many calories you should eat when on a fat loss diet?

And that’s something I want to cover here and point out a few mistakes I see guys make all the time with calories.

Related videos to help you set up your nutrition:
How to estimate calorie maintenance
General fat loss guide
Setting your macros
Best macros for fat loss

The link mentioned in the video:

The truth is that there’s no way to know how your body will react to a specific calorie intake.

There are many things we can’t control when it comes to our energy expenditure such as our NEAT levels which can vary to thousands of calories.

And this means that you need to become good at adjusting calories based on how our body responds.

Sadly, most people don’t do the first nutrition phase properly which in a lot of cases mean they’re not setting themselves up for success.

So in this video, I wanted to share with you guys how the first eight weeks of a diet setup might look like if your goal is to maximize fat loss.

Why eight weeks, why so long? You’ll see.

Let’s start with week 1 and 2. In this phase, you estimate your maintenance calories and then reduce based on the rate of fat loss.

Average reduction is 20%. So if your maintenance is 2500, you reduce by 500 kcal / day on average which would give approx. About 1 lbs/week of loss.

Moving on, we have week 3 and 4. (This is where most people make a mistake)

Week 3, you let the body get used to the lower intake. There might be a delay in fat loss, and also the data is skewed when you drop the carbs because of water weight drop. Often we see huge drops in weight during this week as 1 gram of glycogen holds about 3 grams of water.

The for week 4 give yourself time to become better with food planning and tracking. Also, you might be dealing with Whooshes and Squishy Fat for a week where your fat cells become replaced by water temporarily.

So I don’t recommend using week 3 and four as data to determine if your calories were set correctly despite that fact that you’re technically already in a calorie deficit.

Now, we move on to Week 5 to 8.

These are the four weeks which you will use to determine the first adjustment to your calories.

For this phase, I recommend full tracking with daily weigh-ins to get the weekly average. Additionally, I recommend measuring waist size on Sunday, and 4 point caliper measurement.

Then after this four week period, you can use the data to adjust your calories to match the average rate of weight loss which is going to be anywhere between 0,5 – 1.5% of your BW / Week. (

You might need to reduce 10% more and re-assess again in 4 weeks or just keep it as is.

It’s important to be patient and give yourself enough time in that initial eight-week phase for a productive cut.

Hope you enjoyed! Let me know in the comments if you find this helpful.

Talk soon! – Mario

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39 Comments

  1. Love your videos. Do you think an Apple Watch or Whoop tracker are useful for estimating total daily burnt calories? And using an average of say like 2w or 1m worth of data to set a calorie deficit ?

  2. its a lot easier to just weigh yourself first thing in the morning after you been to toilet but before you’ve eaten will save you weeks getting your baseline -Ive never heard anything like this – typical analysis paralysis

  3. Another video, with amazing content 👌, this channel gives you a lot of key points which other fitness youtubers forget to mention, instead of just telling you how to do it, Mario actually tells you about the set backs and the fact that it does take a lot longer than predicted to get to your goal! Thanks Mario once again!

  4. Super informative video Mario, thank you. What’s the longest you would prescribe a cut for? I’m on week 9 now (nearly week 10) and am losing 0.5-0.8% body weight consistently every week. Week 7 I stayed the same weight but like u say probably made some mistakes with my tracking 🙂

    Thing is, I’m eating quite a bit more than usual to hit my protein intake correctly (150g/day) so I have to workout quite a bit to make up for the extra calories from the extra food. So I don’t know if I can really burn much extra calories if I hit a plateau. In that case, what would you recommend? Cutting calories more (from carbs and fats) or would you recommend taking a few weeks break (maybe at maintenance?) then cutting again?

  5. I guess I went to hard on my diet. Really hard to maintain for me and I feel worse. I calculated my intake via your other video now and I ate too less. I am now going to go less hard on myself and see what happens.

  6. 4:55 that's some serious balancing skill right there. 🙂
    Great video as always. One thing I find a bit irritating is when you switch the perspective and we see you talking into the camera, but not the one actually recording. I feel this doesn't really add anything, but is probably additional work, so I'm not sure if it is worth it. Also, really don't need you to be THAT zoomed in (1:10). 😀

  7. Great tips Mario! I've been at it for 14 weeks lost 11 pounds of fat and gained 6 pounds of muscle and I workout hard!! And it's finally showing. My macros I follow is 50% protein 30% carbs and 20% fat. I struggle in the beginning to find what works like you said. I now feel I'm on the right track. Keep them wonderful videos coming your doing some good out there! Cheers!

  8. Hello Mario,
    I watched your videos on the setup of macronutrients, you said that 0.7g per lbm was fine for fats, and never under 80g.
    If I want to maintain my weight I have to eat 1500-1600kcal (I weigh 144lbs).
    So if I setup my macros, this will result in:
    144g of protein;
    101g of fats;
    5g of carbs.
    But my carbs are actually like extremelly low, what do I need to do?
    Thanks, your are amazing.
    Isaac.
    😛

  9. I've done intermittent fasting for about a year and seen huge results. I've lost 37kg and I have alot more energy. However my sexdrive has plummeted. Do you think that might be a sign of low T or do I need to eat more fats/carbs? I still feel like I have alot of energy throughout the day though

  10. my calorie maintenance is 2500 calories, however because I wanted fast results I cut to 1200 calories, and I haven't seen any results for 3 weeks, should I increase my calorie intake to maintenance and cut calories slowly depending on weight?

  11. Not sure how to set calories for fat loss? Here's a quick guide on how to get yourself into a caloric deficit, and a few mistakes I see guys make all the time with this. Enjoy the video and have fun getting ripped 🙂

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