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Conversion Chart

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