Calculators
Epoxy Resin Volume Calculators
Determine the exact amount of epoxy needed for your project. Calculate volumes for rectangular or cylindrical molds, and surface coating applications - eliminating waste and ensuring perfect results every time.
Casting & Mold Making Calculator
Calculate silicone rubber and casting resin quantities for your molds
Mold Box Dimensions
Part Dimensions
Volume Information
Mold Box Dimensions
Part Dimensions
Volume Information
Silicone Rubber Needed
Casting Resin Needed
Epoxy Surface Coating Calculator
Epoxy Coverage Guide
| Thickness (in) | Fluid Ounces per Sq Ft |
|---|---|
| 1/16" (0.0625) | 4.8 oz |
| 1/8" (0.125) | 9.6 oz |
| 3/16" (0.1875) | 14.4 oz |
| 1/4" (0.25) | 19.9 oz |
| 5/16" (0.3125) | 24.7 oz |
| 3/8" (0.375) | 28.8 oz |
| 7/16" (0.4375) | 33.6 oz |
| 1/2" (0.5) | 38.4 oz |
| 5/8" (0.625) | 48.0 oz |
| 3/4" (0.75) | 57.6 oz |
| 7/8" (0.875) | 67.2 oz |
| 1" (1.00) | 76.8 oz |
What are the dimensions of your project?
What is the diameter and thickness of your project?
1/16" or 0.0625 recommended for seal coats
1/8" or 0.125 recommended for flood coating
| 1/16" = 0.0625 | 1/8" = 0.125 | 1/4" = 0.25 | 3/8" = 0.375 |
| 1/2" = 0.50 | 5/8" = 0.625 | 3/4" = 0.75 | 7/8" = 0.875 |
Amount of mixed epoxy needed
Fluid Ounces (fl oz)
39.89Milliliters (mL)
1179.90Gallons (gal)
0.31Liters (L)
1.18Amount of RTV Needed for Making a Silicone Rubber Mold
Note: There are 21 grams per cubic inch of Silicone Rubber.
There are 453 grams in 1lb.
Formula for a Square/Rectangle Mold:
Length x Width x Height
Example: You have a mold box that needs to be filled up 9" x 4" x 2" = 72 cubic inches in order to completely cover your original/part.
Now using the same formula, subtract the cubic inches (volume) of your part.
Example: Your part is 8" x 3.5" x 1.5" = 42 cubic inches.
Then you would take 72 - 42 to give you a total of 30 cubic inches.
30 cubic inches x 21 grams per cubic inch = 630 grams of RTV needed.
To convert to lbs: 630 ÷ 453 = 1.39 lbs of RTV.
Formula for a Round Mold:
Pi x Radius (squared) x Height
Example: The diameter of a mold is 4" (the radius would be 2") and the height is 3".
2" x 2" (radius squared) x 3.14 (pi) x 3" (height) = 37.68 cubic inches.
Subtract the volume of your part:
Example: The part is 3.5" diameter (1.75" radius) by 2.75" high.
1.75" x 1.75" x 3.14 x 2.75" = 26.45 cubic inches.
37.68 - 26.45 = 11.23 cubic inches.
11.23 cubic inches x 21 grams per cubic inch = 236 grams of RTV.
To convert to lbs: 236 ÷ 453 = 0.52 lbs of RTV.
Amount of Resin Needed to Cast a Part
Note: There are 0.554 ounces in 1 cubic inch of Alumilite Resin.
Formula for a Square/Rectangular Piece:
Length x Width x Height
Example: If your piece is 3" x 4" x 2" = 24 cubic inches.
24 cubic inches x 0.554 ounces per cubic inch = 13.25 ounces.
Formula for a Round Piece:
Pi x Radius (squared) x Height
Use the same formula as the RTV round mold to calculate resin needed.
Multiply by 0.554 ounces per cubic inch to determine ounces needed.
