Ring Weight

Last modified by

KurtHeckman

on

Jul 20, 2024, 1:25:45 PM

Created by

KurtHeckman

on

Aug 14, 2017, 2:06:08 PM

`M = pi * t *[ ( "d2" /2)^2 - ( "d1" /2)^2] * 7850.0 `

`(d1)"Inner Diameter"`

`(d2)"Outer Diameter"`

`(t)"Thickness"`

`(mD)"The Mean Density of the ring"`

The Math / Science

The equation for the mass of a ring is the volume of a ring times the mean density as follows:

`M = pi * t *[ (d_2/2)^2 - (d_1/2)^2] * mD`

where:

M = mass or weight of ring or gasket
t = thickness of ring
d₁ = inner diameter
d₂ = outer diameter
mD = mean density of the material composing the ring (.e.g. 0.24 g/cm³ for the density of solid cork

Mean Density Table

Common Mean Densities in Kilograms per Meter Cubed (kg/m³)

Fluids

Pure Water - 1,000
Seawater - 1,022
Milk - 1,037
Olive Oil - 860
Cement Slurry - 1,442

Fuels

Diesel Fuel - 885
Crude Oil - 870 to 920
Fuel Oil - 890
Ethanol - 789
Gasoline (petrol) - 737
Propane - 493
Liquid Natural Gas - 430 to 470

Market-Ready Grains

Corn - 721 (56 lb/bu)
Wheat - 772 (60 lb/bu)
Barley - 618 (48 lb/bu)
Oats - 412 (32 lb/bu)
Rye - 721 (56 lb/bu)
Soybean - 772 (60 lb/bu)

Metals

Earthen

Concrete - 2,371
Dirt - 1,250
Fire Clay - 1,362
Glass - 2,500
Granite - 2,691
Sand (dry) - 1,602
Sand (wet) - 2,082
Sandstone - 2,323

Synthetic

Bakelite - 1,362
Carbon Fiber - 2,000

Organic

Balsa - 170
Cork - 240
Mahogany - 545
Oak - 760
Pine - 539
Rubber - 1,522

Mean Density Lookup Function

Mean density is scientifically volume divided by mass. There are various unit for density adopted by cultures and industries. Common units for density included the following:

kilograms per cubic meter (kg/m³)
grams per cubic centimeter (g/cm³)
grams per liter (g/L)
pounds per cubic feet (lb/ft³)
ounces per cubic inch (oz/in³)
pounds per barrel (lb/bbl)
pounds per bushel (lb/bu)

If you want to identify a material by its density, use the Density Within Range tool.

Weight is technically the downward force that a mass exerts based on the force of gravity and the mass of the object. On the surface of the Earth, mass and weight are often interchanged. In some places, objects are sold by the gram (mass), and in other locations, the same objects are sold by the ounce (weight).

The Weight Calculators use the dimensions of an object and its shape to compute the objects volume. They then apply a density associated with a material to estimate the objects weight.