Common Equations Used
The following is to calculate theoretical measurements/weights and does not take into account manufacturing tolerances. Always use decimal equivalents when calculating, see our decimal equivalent chart for help. This comes in handy for odd sizes you don't normally encounter or for custom machined sizes where you need to know either weights or dimensions.
To calculate
pounds per lineal foot of a diameter of a round bar: Diameter
² x 2.67036
i.e., For a 2" diameter, (2 x 2) x 2.67036 = 10.68 lbs per foot
To calculate
pounds per lineal foot of a flat or square bar: Width x Thickness x 3.404
i.e., For a 3/4 x 2, .75 x 2 x 3.404 = 5.106 lbs per foot
To calculate the
pounds per lineal foot of a hex bar: (Diameter in
inches)² x 2.94
i.e., For a 1-3/4" hex, 1.75 x 1.75 x 2.94 = 9 lbs per foot
To find the
diagonal measurement (corner to corner) on hex material: Size in inches x
1.1547
i.e., For a 3/4" hex, .75 x 1.1547 = .866 inches diagonally
Metric Conversion Equations
To convert from
metric to English standard, millimeters divided by 25.4
i.e., To convert 10 mm to inches, 10 divided by 25.4 = .393 inches
This falls between 25/64 and 13/32"
To convert from English standard to metric, inches x 25.4
i.e., To convert 1-1/2" to millimeters, 1.5 x 25.4 = 38.1 mm