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Weight Formulas

Listing of Weight Formulas

  • ROUND ROD

    Square of diameter X 9.42 X density of alloy = weight per lineal foot in pounds.

  • SQUARE BAR

    Square of one side X 12 X density of alloy = weight per lineal foot in pounds.

  • HEXAGON ROD

    Square of distance across flats X 10.4 X density of alloy = weight per lineal foot.

  • RECTANGULAR BAR

    Thickness X width X 12 X density of alloy = weight per lineal foot in pounds.

  • ROUND TUBE

    37.7 X density of alloy X wall thickness X outside diameter minus wall thickness = weight per lineal foot in pounds.

  • SQUARE TUBE

    1.27 X the weight of a round tube of the same wall thickness, and of diameter equal to the distance across the flats of the square tube = weight per lineal foot.

  • SHEET

    Thickness X 144 X density of alloy = weight per square foot in pounds.

  • STRIPS AND ROLLS

    Thickness X width X 12 X density of alloy = weight per lineal foot in pounds.

  • CIRCLES

    Square of diameter X thickness X 0.785 X density of alloy = weight of a circle.

  • RINGS

    Outside diameter plus inside diameter X outside diameter minus inside diameter X thickness X 0.785 X density of alloy = weight of ring in pounds.

DENSITIES OF POPULAR METALS

(Lbs per cubic inch)

Metal Density
Aluminum 0.0975
Ampco Metal 0.274
SAE 660 Bearing Bronze 0.318
Brass 0.308
Copper 0.323
Cupro Nickel 0.323
Gold 0.697
Iron 0.284
Lead 0.41
Magnesium 0.061
Manganese 0.267
Muntz Metal 0.308
Naval Brass 0.304
Nickel 0.322
Platinum 0.775
Silver 0.378
Stainless Steel 0.2871
Steel 0.284
Tin 0.264
Tobin Bronze 0.304
Zinc 0.258