# Weight Gain Calculator

> Calculate the daily calories needed to gain weight at your target weekly rate based on your BMR, TDEE, and surplus.

**URL:** https://www.calculatoranswers.com/weight-gain-calculator
**Category:** Health

## Quick Answer

Find the daily calories required to gain weight at a target weekly rate. Enter your age, sex, height, weight, activity level, and weight gain rate to calculate your target calorie intake.

## Definition

Weight gain occurs when daily caloric intake consistently exceeds Total Daily Energy Expenditure (TDEE), creating a calorie surplus. A weight gain calculator estimates the daily calorie surplus required to gain weight at a target weekly rate the user chooses, since no named body publishes a safe rate of weight gain for adults. It calculates Basal Metabolic Rate (BMR) via the Mifflin-St Jeor equation, estimates TDEE based on physical activity level, and adds the surplus calories needed. Fitness professionals, athletes, and underweight individuals use this calculation to structure clean bulks or nutritional therapy programs.

## How to Use

1. **Enter body profile** — Select your sex and unit system, then enter your age, weight, and height.
2. **Select activity level** — Choose the option that matches your weekly physical activity, from sedentary to extra active.
3. **Specify target weight gain rate** — Select or input your desired weekly rate of weight gain (e.g., 0.5 lb/week or 0.25 kg/week).

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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