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By Mofilo Team
Published
If you're asking 'should i increase calories if i'm not gaining weight,' the answer is an immediate yes. But the real solution isn't just eating one more chicken breast; it's about ending the guesswork and using simple math to guarantee results.
It’s one of the most maddening experiences in fitness. You're eating until you’re uncomfortable, you’re lifting heavy, and for two, three, or even four weeks, the number on the scale has not changed. You start to think you're a "hardgainer" or have a uniquely fast metabolism.
Let's be direct: you are not gaining weight for one reason. You are not in a calorie surplus.
Energy balance is a law of physics. To gain weight, you must consume more energy (calories) than your body expends. There are no exceptions. If the scale isn't moving up, you are eating at your maintenance level, no matter how much food it feels like.
Most people who struggle to gain weight make two critical errors:
The term "hardgainer" is a myth. People who call themselves hardgainers are simply people who have a poor appetite, a high activity level, and a habit of misjudging their calorie intake. It's a math problem, not a genetic curse.

Track your food. Know you are in a surplus every single day.
Telling someone who isn't gaining weight to "just eat more" is like telling someone in debt to "just spend less." It's directionally correct but completely useless without a system.
Guessing does not work. You cannot manage what you do not measure.
Imagine trying to build a house without a tape measure. You could guess the length of each board, but the final structure would be unstable and crooked. Your body is the same. Without tracking your calories, you are guessing every single day.
A "big scoop" of peanut butter can be 150 calories or it can be 400 calories. A "splash" of olive oil in the pan can be 40 calories or 200. These small, untracked additions or omissions are the difference between a surplus and maintenance.
When you don't track, your daily intake is inconsistent. You might eat 3,000 calories on Monday, feel full, and then unconsciously eat only 2,200 on Tuesday. Your weekly average ends up right back at your maintenance level of 2,600, and you gain zero weight. You're left frustrated, believing you're eating a lot because you remember the 3,000-calorie day, but the math tells the real story.
Tracking removes all emotion and guesswork. It provides cold, hard data. With data, you can make intelligent adjustments. Without it, you're just hoping for a different result while doing the same thing.
Stop guessing and start building. Follow this exact three-step process. It works every time because it's based on your body's actual data, not a generic online calculator.
Before you can add, you need to know your baseline. For the next 7 days, do not change how you eat. Your only job is to track and weigh everything that you consume. Use an app like Mofilo, MyFitnessPal, or Cronometer.
Be brutally honest. Log the oil you cook with, the sugar in your coffee, the handful of almonds you grabbed. At the end of 7 days, add up the total calories for the week and divide by 7. This is your average daily intake.
Also, weigh yourself every morning after using the bathroom and before eating or drinking. At the end of the week, calculate your average weight. If your weekly average weight was stable, your average daily calorie intake is your real-world maintenance number. This number is 100 times more accurate than any online calculator.
Now you have your starting point. Take your maintenance number and add 300 to 500 calories. This is your new daily target.
Why this range? A 300-500 calorie surplus is the sweet spot. It's large enough to provide combinatie resources for muscle growth but small enough to minimize fat gain. A larger surplus, like 1,000+ calories, will make the scale move faster, but a much higher percentage of that gain will be body fat, which you'll just have to diet off later.
Continue tracking your intake to ensure you hit your new target of 2,900-3,100 calories every day. Consistency is everything.
Continue weighing yourself daily and calculating the weekly average. After two weeks in your new surplus, assess the change in your average weight.
This is a dynamic process. As you gain weight, your maintenance calories will slowly increase. You must continue to track and adjust to ensure you stay in that productive surplus.

No more wondering if you ate enough. See the numbers that make the scale move.
Knowing the plan is one thing; navigating the real-world challenges is another. Here’s what to expect and how to solve common problems.
Aiming for a 0.5-1.0 pound gain per week means a 10-pound weight gain will take 10 to 20 weeks. This is a marathon, not a sprint. Trying to rush the process by eating 5,000 calories a day from day one is the fastest way to get fat, not muscular. Be patient and trust the process of slow, steady, controlled gains.
This is the most common barrier. The solution is not to eat more volume, but more density. Stop trying to eat more chicken breast and broccoli. Instead, add calorie-dense foods that take up less space.
If your waist measurement is increasing faster than your chest and shoulder measurements, your surplus is too large. Reduce your daily calories by 200-300 and hold for two weeks. Also, ensure two other things are in place:
If you've added 300-500 calories and the scale hasn't budged after two weeks, one of two things is happening.
First, you are not tracking accurately. Go back over your logs. Are you logging the creamer in your coffee? The sauces on your food? The 3 beers you had on Friday? These untracked items can easily erase a 300-calorie surplus. Be honest with your log.
Second, your activity level may have unconsciously increased. Sometimes when we eat more, we have more energy and fidget or walk more, burning off the extra calories. If you are 100% certain your tracking is perfect, then you simply need to add another 200-300 calories to your daily target.
Aim to gain between 0.5% and 1% of your body weight per week. For a 150-pound person, this is 0.75 to 1.5 pounds per week. A more conservative target of 0.5 to 1.0 pounds per week is ideal for minimizing fat gain.
No, you do not need a mass gainer. They are just a convenient, powdered form of calories, typically maltodextrin (a carb) and whey protein. You can easily make your own, healthier version in a blender with oats, protein powder, milk, and peanut butter for a fraction of the cost.
First, hit your calorie target. Second, hit your protein target of 1.6-2.2 grams per kilogram of body weight. After that, fill in the rest of your calories with carbohydrates and fats. A good starting point is 20-30% of total calories from fat, with the remainder from carbs.
You should stay in a surplus for as long as you are making progress without accumulating an uncomfortable amount of body fat. A typical bulking phase lasts 4-6 months, followed by a 2-3 month cutting phase to shed the excess fat and reveal the new muscle.
Stop wondering if you should increase your calories. The answer is yes. The real work is to stop guessing, start tracking, and methodically apply a 300-500 calorie surplus. This is the only path to breaking your plateau and finally building the size and strength you're working for.
All content and media on Mofilo is created and published for informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition, including but not limited to eating disorders, nutritional deficiencies, injuries, or any other health concerns. If you think you may have a medical emergency or are experiencing symptoms of any health condition, call your doctor or emergency services immediately.