Free Online Calculators – Perforated Open Area Calculator

When selecting perforated metal sheets, holes open area percent is a very important concept to understand. Holes open area influence or determine filter area, ventilation, shading screening, the pressure resistance and etc.

Here are some open area calculators of the standard perforation patterns. Just fill in the corresponding parameters to calculate the holes open area percent as to you need. For special holes patterns, please contact us for dedicated service. Our professional team will help you.

• Round Hole (Straight Pattern)
• Round Hole (45 ° Staggered)
• Round Hole (60 ° Staggered)
• Square Hole (Straight Pattern)
• Square Hole (Staggered Pattern)
• Square Hole (45 ° Staggered)
• Slotted Hole (Staggered)
• Slotted Hole (45 ° Staggered)
• Slotted Hole (Straight Pattern)
• Hexagonal Hole (60 ° Staggered)
• Rectangular Hole (Straight Pattern)
• Rectangular Hole (Staggered)
• Triangle Hole (Staggered)

Round Hole (Straight Pattern)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Round Hole (45 ° Staggered)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Round Hole (60 ° Staggered)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Square Hole (Straight Pattern)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Square Hole (Staggered Pattern)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Square Hole (45 ° Staggered)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Slotted Hole (Staggered)

Enter short edge in mm:

a

Enter edge length in mm:

b

Enter vertical center distance in mm:

c

Enter horizontal center distance in mm:

c₁

Result

Open Area:

Slotted Hole (45 ° Staggered)

Enter short edge in mm:

a

Enter edge length in mm:

b

Enter vertical center distance in mm:

c

Enter horizontal center distance in mm:

c₁

Result

Open Area:

Slotted Hole (Straight Pattern)

Enter short edge in mm:

a

Enter edge length in mm:

b

Enter vertical center distance in mm:

c

Enter horizontal center distance in mm:

c₁

Result

Open Area:

Hexagonal Hole (60 ° Staggered)

Enter hole diameter in mm:

d

Enter center distance in mm:

c

Result

Open Area:

Rectangular Hole (Straight Pattern)

Enter hole width a in mm:

a

Enter hole length b in mm:

b

Enter pitch c in mm:

c

Enter pitch c₁ in mm:

c₁

Result

Open Area:

Rectangular Hole (Staggered)

Enter hole width a in mm:

a

Enter hole length b in mm:

b

Enter pitch c in mm:

c

Enter pitch c₁ in mm:

c₁

Result

Open Area:

Triangle Hole (Staggered)

Enter hole width a in mm:

a

Enter hole length b in mm:

b

Enter pitch c in mm:

c

Enter pitch c₁ in mm:

c₁

Result

Open Area: