Enter your wrist size and body fat percentage into the calculator to estimate your maximum bicep size. This calculator helps to provide a target for bodybuilders and fitness enthusiasts.

Maximum Bicep Size Formula

The following formula is used to estimate the maximum bicep size:

MBS = WS * 2.5 * LF

Variables:

  • MBS is the maximum bicep size (inches)
  • WS is the wrist size (inches)
  • LF is the lean factor, which is calculated as (100 – Body Fat Percentage) / 100

To estimate the maximum bicep size, multiply the wrist size by 2.5 and then by the lean factor, which accounts for body fat percentage.

What is Maximum Bicep Size?

Maximum bicep size is an estimate of the largest circumference your biceps can achieve based on your wrist size and body fat percentage. It is a theoretical value used by bodybuilders and fitness enthusiasts to set goals and expectations for muscle growth. It is important to note that genetic factors also play a significant role in muscle development and may affect the actual maximum size achievable.

How to Calculate Maximum Bicep Size?

The following steps outline how to estimate the Maximum Bicep Size:


  1. First, measure the circumference of your wrist to determine the wrist size (WS).
  2. Next, determine your body fat percentage (BF).
  3. Calculate the lean factor (LF) using the formula LF = (100 – BF) / 100.
  4. Use the formula MBS = WS * 2.5 * LF to estimate the maximum bicep size (MBS).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Wrist Size (WS) = 6.5 inches

Body Fat Percentage (BF) = 15%