Sometimes an installer needs to calculate the volume of some geometric shape or units of measure. Below are some formulas that should help out.
Triangle Area = 0.5x (Base) x (Height)
Circle Area = (Radius) x (Radius) x 3.1415
Circle Area = (Radius) x (Radius) x 3.1415
1 inch = 25.4 mm
1 mm = 0.0394 inches
1 liter = 0.0353 cubic feet
1 cubic foot = 28.32 liters
1 gallon = 0.134 cubic feet
1 cubic foot = 7.48 gallons
1 cubic foot = 1728 cubic inches
1 cubic inch = 0.00433 cubic feet
Volume (Cubic inches) = (Length) x (Width) x (Height)
milli = 0.001 micro= 0.000001 kilo = 1000 Mega = 1,000,000
| Port Diameter | Inside Area | Outside Area (1/4 in walls) | Outside Area |
| 1 in | 0.785 sq in | 1.767 sq in | 0.89 x 0.89 in |
| 1.5 in | 1.767 sq in | 3.142 sq in | 1.33 x 1.33 in |
| 2 in | 3.142 sq in | 4.909 sq in | 1.77 x 1.77 in |
| 3 in | 7.069 sq in | 9.621 sq in | 2.66 x 2.66 in |
| 4 in | 12.566 sq in | 15.904 sq in | 3.54 x 3.54 in |
| 5 in | 19.635 sq in | 27.758 sq in | 4.43 x 4.43 in |
| 6 in | 28.274 sq in | 33.183 sq in | 5.32 x 5.32 in |
| 8 in | 50.265 sq in | 56.745 sq in | 7.09 x 7.09 in |
