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Weight Gain Calculator

Select the units, and enter your current and goal weight in the respective fields. The tool will instantly estimate the total calories needed to gain muscle mass.


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This weight gain calculator will help you know the number of calories you need daily to gain weight. If you are willing to build body mass, try this tool to estimate caloric intake for your goal.

How To Gain Weight?

Gaining weight is not as simple as it seems! You need to know certain factors that contribute to the weight gain practice. This is why it is a must to do it in the right way.

Your total daily energy expenditure (TDEE) and Basal metabolic rate (BMR) play a very important role in your weight gain journey

Try avoiding junk food, soda, or other alcoholic beverages! This is because they might be helpful in increasing your weight fast, but various health-related diseases are also linked to them

How Many Calories Should I Eat To Gain Weight?

It is compulsory to eat more calories to gain weight than you burn on a daily basis. Recent research conducted by the Centers for Disease Control and Prevention (CDC) has revealed that a normal person should try gaining weight by 2 lbs per week. This is the standard range within which a person gains weight without any health issues.

The caloric consumption for weight gain differs for women who are expecting. In such a condition, we have another pregnancy weight gain calculator that gives a proper weight gain plan during the pregnancy period.

However, it’s up to you whether you are willing to gain weight slowly or fastly. For instance, we have compiled the calories needed in both conditions in the following table:

Calorie Considerations Gain Weight Slowly Gain Weight Fast
Original Calorie Load 2,000 2,000
Calories Spent Working Out 600 600
Additional Calories to Eat 300 - 500 700 - 1,000
Total Daily Calories 2,900 - 3,100 3,300 - 3,600

Risks Associated With Underweight:

If you have BMI below 18.5, you are underweight! Where excess weight is dangerous, being underweight has its own adverse effects on your health. The most common of these risks include:

  • Osteoporosis
  • Regular sickness
  • Decline in immunity
  • Higher chances of fertility decrease
  • Decreased muscle strength
  • Vitamin deficiency
  • Surgical complications

Macros Ratios For Weight Gain:

To gain weight without any health issues, it is very important that your diet must intake the following ratio of macros:

Macronutrient Percent Composition (Out of Total Calories)
Protein 30%
Fat 30%
Carbohydrates 40%

How Does This Weight Gain Calculator Work?

With the help of our weight gain calorie calculator, you can estimate the calories needed to gain weight.


  • Select the unit of input and your gender.
  • Enter your age and select your height.
  • Now enter your current and goal weight in their respective fields.
  • Select the activity level and calorie surplus (If you select “Custom” for calorie surplus, then enter your value either in Kcal or Percentage).
  • Set the target date.
  • Enter your body fat percentage (Optional).
  • Tap the "Calculate" button.


  • Your calories increase per day and weight gain calories
  • Calories needed to maintain BMR and TDEE
  • Total time to achieve goal and target date
  • Weight gain macros ratios
  • Weight gain chart to let you know how much weight you will increase on a daily basis


How Many Calories Equals One Pound of Bodyweight?

A general rule of thumb states that one pound of body weight roughly equals 3500 calories. And if you are willing to estimate the calorie equivalent of two or more pounds, you may better subject to the weight gain goal calculator above to start your calculations and know how many calories to gain weight are required.

Can I Maintain My Current Weight Without Gaining or Losing Any Weight?

Yes of course! If you equalize your calorie intake with calorie burn, you can easily maintain your weight without gaining or losing any weight.

Can Being Underweight Cause Death?

Being underweight is a serious issue to be dealt with. This is because it can lead to the generation of various fatal diseases and cause death. Try using this weight gain calculator that will help you estimate how many calories you require to be away from the underweight condition.


From the source Wikipedia: Weight gain, Causes, Effects

From the source Gain Weight Fast, Why is gaining weight important?, underweight, Health risks linked to being underweight, Causes of being underweight

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