How to Calculate Perforated Metal Sheet Open Area?

Open area is a ratio that reflects how much of the sheet is occupied by holes, normally expressed by percent. For example, if the open area of the perforated sheet is 30%, it means that 30% of the sheet is holes and 70% of the sheet is material.

As our customers request, we list the way of open area formular for calculation of perforated sheet with round, square, slot and hexagon holes in straight or staggered row.

Round Perforation - 60 Degree Staggered

Enter hole size in mm:

D

Enter pitch C in mm:

C

Round Perforation - 45 Degree Staggered

Enter hole size in mm:

D

Enter pitch C in mm:

C

Round Perforation - Straight Line

Enter hole size in mm:

D

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂

Square Perforation - Straight Line

Enter hole size S in mm:

S

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂

Square Perforation - Staggered

Enter hole size S in mm:

S

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂

Hex Perfoation

Enter hole size S in mm:

S

Enter pitch C in mm:

C

Round - End Slot - Side Staggered

Enter hole width W in mm:

W

Enter hole length L in mm:

L

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂

Round - End Slot - Straight Line

Enter hole width W in mm:

W

Enter hole length L in mm:

L

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂

Square - End Slot - Straight

Enter hole width W in mm:

W

Enter hole length L in mm:

L

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂

Square - End Slot - Staggered

Enter hole width W in mm:

W

Enter hole length L in mm:

L

Enter pitch C₁ in mm:

C₁

Enter pitch C₂ in mm:

C₂