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Weight Gain Calculator

Health
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Estimates the calorie surplus needed to gain a specific amount of weight over time. Based on the general guideline that 3500 calories equals approximately one pound of fat.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Desired Weight Gain (pounds) and Time Frame (weeks) in the units shown.

Step 2

Read Total Calories Needed and Daily Calorie Surplus in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Gain 2 pounds in 4 weeks

Desired Weight Gain (pounds): 2 pounds; Time Frame (weeks): 4 weeks

Total Calories Needed: 7,000 calories; Daily Calorie Surplus: 250 calories

Gain 5 pounds in 8 weeks

Desired Weight Gain (pounds): 5 pounds; Time Frame (weeks): 8 weeks

Total Calories Needed: 17,500 calories; Daily Calorie Surplus: 313 calories

Gain 10 pounds in 12 weeks

Desired Weight Gain (pounds): 10 pounds; Time Frame (weeks): 12 weeks

Total Calories Needed: 35,000 calories; Daily Calorie Surplus: 417 calories

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Important

Use the result as an estimate and confirm any medical decisions with a qualified professional.