How to gain 40 lbs in a month

To gain 40 lbs in a month, a typical 30-year-old male (5'9", 176.4 lbs, sedentary) burning about 2099 calories per day would need to eat approximately 6837 calories per day.

Note for men: This goal may be excessive for healthy weight gain. A safe rate of gain for men is typically 0.25-0.5 kg (0.5-1 lb) per week.

A typical 30-year-old female (5'3", 132.3 lbs, sedentary) burning about 1547 calories per day, would need to eat approximately 6285 calories per day.

Note for women: This goal may be excessive for healthy weight gain. A safe rate of gain for women is typically 0.2-0.4 kg (0.5-0.75 lb) per week.

These are rough estimates. Your actual calorie needs depend on your age, gender, height, weight, and activity level. Use the calculator below to get a personalized estimate.

Enter your parameters below to get a personalized estimate

Adjust the parameters below to see projections based on your own body metrics.

Your Parameters
ft
in
Daily Energy Expenditure (TDEE)

Estimated from your parameters

2099 kcal/day

Your Goal

To gain 40 lbs in 1 month, you would need to eat approximately 6837 calories per day, given your TDEE of 2099 kcal/day. After reaching your goal, your maintenance intake would be approximately 2316 kcal/day.

Warning: Eating over 4,000 kcal/day may lead to excessive fat gain. Consider a longer timeframe for healthier results.

Estimated Weight Over Time
Daily Calories1 Week2 Weeks1 Month3 Months
1679 kcal-20%175.5 lbs174.6 lbs172.8 lbs166.2 lbs
1889 kcal-10%175.9 lbs175.5 lbs174.6 lbs171.3 lbs
2099 kcalMaintenance176.4 lbs176.4 lbs176.4 lbs176.4 lbs
2308 kcal+10%176.8 lbs177.3 lbs178.1 lbs181.4 lbs
2518 kcal+20%177.3 lbs178.1 lbs179.9 lbs186.5 lbs
6837 kcalYour goal (+226%)185.8 lbs195.1 lbs216.3 lbs290.3 lbs
Weight Projection
1679 kcal (-20%)
1889 kcal (-10%)
2099 kcal (Maintenance)
2308 kcal (+10%)
2518 kcal (+20%)
6837 kcal (Your goal (+226%))
Target

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