




Space
Cloth Open Area Formula 
800.440.6374 Phone 360.835.7507
sales@wovenwire.com 





Opening 

2 


Percent Open Area 
= 




X 
100 



Opening + Diameter 






EXAMPLE 1 
Assume an opening of
1/2" and a wire diameter of 1/8" 
The above formula
requires that all fractions of one inch must first be converted into their
decimal equivalents therefore: 
The opening of 1/2" = 1
divided by 2 = 0.50" 
The wire diameter of
1/8" = 1 divided by 8 = 0.125" 

1 

Add the opening and
wire diameter together. 
0.50 + 0.125 = 0.625 
2 

Divide the result
above of into the opening. 
0.50 divided by 0.625 = 0.80 
3 

Square the above
result (multiply by itself). 
0.80 x 0.80 = 0.64 
4 

Multiply the result
by 100. 
100 x 0.64 
5 

The solution should
be expressed as as: 
64% 


EXAMPLE 2 
Assume an opening of
1.625" and a wire diameter of 0.244" 

1 

Add the opening and
wire diameter together. 
1.625 + 0.244 = 1.869 
2 

Divide the result
above of into the opening. 
1.625 divided by 1.869 = 0.8694 
3 

Square the above
result (multiply by itself). 
0.8694 x 0.8694 = 0.7558 
4 

Multiply the result
by 100. 
100 x .7558 = 75.58 
5 

The solution should
be expressed as as: 
75.58% 



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Last modified:
December 14, 2016 







