Calorie Calculator to Put on Weight

Gaining weight requires a calorie surplus, meaning you consume more calories than your body burns. This calculator helps you determine your daily calorie needs to safely put on weight while considering your activity level and goals.

How to Use This Calculator

To use this calorie calculator to put on weight:

Enter your age in years
Select your gender (male or female)
Enter your weight in pounds
Enter your height in inches
Select your activity level from the dropdown
Click "Calculate" to see your recommended daily calorie intake

The calculator uses the Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR), then adjusts for your activity level to provide a Total Daily Energy Expenditure (TDEE) estimate.

Formula Used

The calculator uses the following formulas:

Basal Metabolic Rate (BMR)

For men: BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age + 5

For women: BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age - 161

Total Daily Energy Expenditure (TDEE)

TDEE = BMR × Activity Factor

Where Activity Factor is based on your activity level:

Sedentary: 1.2
Lightly active: 1.375
Moderately active: 1.55
Very active: 1.725
Extremely active: 1.9

Calorie Surplus for Weight Gain

To gain weight, consume 250-500 calories more than your TDEE daily

Recommended intake = TDEE + 300-500 calories

These formulas provide an estimate. Individual results may vary based on factors like muscle mass, metabolism, and overall health.

Worked Example

Let's calculate the daily calorie needs for a 30-year-old woman who weighs 150 pounds, is 5'6" tall, and is moderately active:

Convert weight to kg: 150 lbs × 0.4536 = 68.04 kg
Convert height to cm: 5'6" = 66 inches × 2.54 = 167.64 cm
Calculate BMR: 10 × 68.04 + 6.25 × 167.64 - 5 × 30 - 161 = 1,630.4 kcal/day
Calculate TDEE: 1,630.4 × 1.55 = 2,538.4 kcal/day
Add calorie surplus: 2,538.4 + 300 = 2,838.4 kcal/day

This woman should consume approximately 2,838 calories per day to gain weight at a moderate rate.

Note: For faster weight gain, you can increase the surplus to 500 calories per day, but this may lead to more fat gain than muscle.

Interpreting Results

The calculator provides an estimate of your daily calorie needs to put on weight. Here's what to consider:

Daily Calorie Needs

The main number shows your estimated calorie needs to maintain your current weight. To gain weight, add 300-500 calories to this number.

Activity Level Adjustments

Your activity level significantly impacts your calorie needs. If you're more active than the calculator assumes, you may need to increase your intake further.

Weight Gain Rate

Calorie Surplus	Approximate Weight Gain
300 calories/day	0.25-0.5 lbs/week
500 calories/day	0.5-1 lb/week
700 calories/day	1-1.5 lbs/week

Practical Tips

Focus on protein-rich foods to support muscle growth
Include healthy fats in your diet for energy
Choose complex carbohydrates for sustained energy
Stay hydrated and get adequate sleep
Monitor progress weekly and adjust as needed

Consult with a healthcare professional or registered dietitian before making significant changes to your diet or exercise routine.

Frequently Asked Questions

How quickly can I gain weight using this calculator?

The rate of weight gain depends on your calorie surplus. A 300-calorie surplus typically results in 0.25-0.5 lbs per week, while a 500-calorie surplus may lead to 0.5-1 lb per week. Faster weight gain may include more fat than muscle.

Is it safe to gain weight quickly?

Quick weight gain can be safe if done properly, but it may lead to more fat gain than muscle. Focus on a balanced diet with adequate protein, healthy fats, and complex carbohydrates for sustainable results.

What foods should I eat to gain weight?

Focus on nutrient-dense foods like lean meats, eggs, dairy, nuts, whole grains, fruits, and vegetables. Avoid excessive processed foods and sugary drinks.

How much protein do I need to gain weight?

For weight gain, aim for 0.7-1 gram of protein per pound of body weight. This supports muscle growth and helps maintain a positive calorie balance.

Should I track my calories strictly?

While tracking can be helpful, focus on whole foods and portion control rather than strict calorie counting. Listen to your body's hunger and fullness cues.