pandaexpress:)
Iron
- Joined
- Oct 20, 2025
- Posts
- 92
- Reputation
- 38
I’ve seen a lot of posts where people claim their bi-delt width is “21 inches+,” yet they still get mogged by other men. So chances are that a lot of people here are measuring incorrectly.
Here’s how to do it correctly, depending on what you want to measure:
---
Measuring Bi-Deltoid Width
Stand with your back against a wall.
Have someone (or yourself) mark the outermost point of each deltoid.
Measure the straight line distance between the two marks.
Average bi-deltoid width:
Males: 20 inches
Females: 17 inches
---
Measuring Bi-Acromial Width
The most accurate method is using a sliding caliper.
Alternatively, stand against a wall, mark the outer edge of each acromion, and measure the straight distance between the two points.
Average bi-acromial width:
Males: 16 inches
Females: 14 inches
These measurements are used in anthropometry studies, so they match official percentile charts. Using a measuring tape isn’t accurate because it follows the curve of your body, inflating the result.
---
So if you’re comparing yourself to those charts, make sure you’re measuring the same way they did.
---
Bideltoid and biacromial percentile charts are below so you can compare your measurements if you want.
---
As for me, my measurements are:
18.25-inch bi-acromial
21-inch untrained bi-delt
Just had to flex.
Here’s how to do it correctly, depending on what you want to measure:
---
Measuring Bi-Deltoid WidthStand with your back against a wall.
Have someone (or yourself) mark the outermost point of each deltoid.
Measure the straight line distance between the two marks.
Average bi-deltoid width:
Males: 20 inches
Females: 17 inches
---
Measuring Bi-Acromial WidthThe most accurate method is using a sliding caliper.
Alternatively, stand against a wall, mark the outer edge of each acromion, and measure the straight distance between the two points.
Average bi-acromial width:
Males: 16 inches
Females: 14 inches
These measurements are used in anthropometry studies, so they match official percentile charts. Using a measuring tape isn’t accurate because it follows the curve of your body, inflating the result.
---
So if you’re comparing yourself to those charts, make sure you’re measuring the same way they did.
---
Bideltoid and biacromial percentile charts are below so you can compare your measurements if you want.
---
As for me, my measurements are:
18.25-inch bi-acromial
21-inch untrained bi-delt
Just had to flex.
