My BMI is 39 how much weight should I lose to reach a bmi of 25?

To calculate the amount of weight you should lose to reach a BMI of 25, you can use the following formula:

Weight loss = (Current weight in pounds) x (Current BMI - Desired BMI) / (Desired BMI)

In your case, your current BMI is 39 and your desired BMI is 25. So, the weight loss you should aim for is:

Weight loss = (Current weight in pounds) x (39 - 25) / 25

Let's say your current weight is 200 pounds. Substituting this value into the formula, we get:

Weight loss = 200 pounds x (39 - 25) / 25

= 200 pounds x 14 / 25

= 112 pounds

Therefore, to reach a BMI of 25, you should aim to lose approximately 112 pounds. Keep in mind that this calculation provides a general guideline and it's always best to consult with a healthcare professional for personalized advice based on your specific health and circumstances.