Calculation of an Open Area

The formulae on this page are used to calculate the open area of a user defined perforation. The results are calculated automatically by clicking the “Submit” button when you have entered all the relevant figures.

Calculation of open area: round holes, triangular pitch

Calculation of open area: round holes, rectangular pitch

Calculation of open area: square holes, rectangular pitch

Calculation of open area: square holes, staggered pitch

Calculation of open area: slot holes, staggered pitch

Calculation of open area: rectangular holes, staggered pitch

Reservations

Please note that these are a guide only. We cannot be held responsible for any mistakes in the results of the calculations made on this page, for example errors made when entering values or errors in the formulae themselves.

Enter hole size in mm:	R
Enter pitch 1 in mm:	U1
Enter pitch 2 in mm:	U2

Enter hole size in mm:	C
Enter pitch 1 in mm:	U1
Enter pitch 2 in mm:	U2

Enter hole size in mm:	C
Enter pitch 1 in mm:	Z1
Enter pitch 2 in mm:	Z2

Enter the width of the hole in mm:	R
Enter the length of the hole in mm:	L
Enter pitch 1 in mm:	Z1
Enter pitch 2 in mm:	Z2

Enter the width of the hole in mm:	C
Enter the length of the hole in mm:	L
Enter pitch 1 in mm:	Z1
Enter pitch 2 in mm:	Z2