Calculate Delrin (POM acetal) weight from stock shape, dimensions, and grade density for sheet, rod, tube, hex, and square bar, plus material cost per piece.
Delrin Weight Formula
The following formula is used to calculate a Delrin Weight.
- Where Wd is the Delrin weight (lbs)
- L is the length (in)
- W is the width (in)
- T is the thickness (in)
- d is the density (lbs/in^3)
- the legacy example uses .05222 lb/in³; select Legacy reference to reproduce it. Actual grade density varies.
To calculate a Delrin weight, calculate its volume and multiply by the density for the exact grade in compatible units. Rectangular stock uses length × width × thickness; other supported shapes use their cross-section area × length.
What is the Weight of Delrin?
Delrin and other acetal grades vary in density. The calculator provides named nominal references and a custom datasheet-density input. Its historical .05222 lb/in³ reference is about 1.445445 g/cm³ and is preserved for the example below, rather than treated as universal.
How to calculate Delrin Weight?
Example Problem:
The following example uses the Legacy reference density of 0.05222 lb/in³ and Weight from dimensions mode. Optional quantity, material price and extra stock allowance apply after the net piece mass; allowance is a percentage added to net stock needs, not a waste fraction.
First, determine the length of the sheet. In this case, the length is 12 inches.
Next, determine the width of the sheet. For this piece, the width is 5 inches.
Next, determine the thickness. This is measured to be 2 inches.
Finally, calculate the Delrin weight using the formula above:
Wd = L*W*T * d
Wd = 12*5*2 * .05222
Wd = 6.2664 lbs
