Weight Gain Calculator

Estimate calorie intake or weight-gain progress from your current measurements, target, activity level, and timeline.

Weight Gain Calculator

The Weight Gain Calculator provides an estimate of the calorie intake needed to support a planned increase in body weight. It can help turn a target weight and timeframe into a simple starting estimate.

How the estimate works

A weight-gain plan generally starts with an estimate of maintenance calories and then adds a calorie surplus. The required surplus depends on the desired rate of weight gain and the assumptions used by the calculator.

Using the calculator

Enter your current weight, target weight, activity information, and timeframe where requested. Review the result as a starting estimate rather than a guaranteed amount of weight gain.

Track progress

Actual weight change is affected by food intake, activity, water balance, digestion, and other factors. Monitoring progress over several weeks gives a more useful picture than relying on one day's scale reading.

Frequently Asked Questions FAQ

What does a Weight Gain Calculator estimate?
It estimates a calorie target or surplus intended to support a planned increase in body weight.
How is a calorie surplus used for weight gain?
A calorie surplus means consuming more energy than the estimated amount used by the body over time.
Will the calculated calorie target guarantee weight gain?
No. Actual weight change varies between individuals and depends on many factors.
Why can body weight change from day to day?
Water balance, food volume, digestion, glycogen, and other short-term factors can change scale weight even without equivalent changes in body tissue.

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