Mold Making & Casting Calculators

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Material Estimator

How much material will you need to complete a project? Use our estimator below to determine the net weight of material based on volume.

1)  (in3/lb) OR
2) ?

How to Calculate Volume

Block Mold: Calculate the total volume of your mold box and subtract the volume of your model. For example, if you have a mold box volume of 6" × 8" × 2" and a model that is roughly 40 in3 then the total volume to estimate is (6×8×2) - 40 = 56 in3.

Brush Mold: Calculate the surface area that you will be molding and multiply by 3/8" (1 cm). For example, if you have a piece with 900 in2 to mold, then the total volume to estimate for a brush mold is 900 × (3/8) = 337.5 in3.

Casting: Use the formulas below to estimate the volume of your casting. For example, if you are casting a cone with a radius of 3" and a height of 9", the total volume to estimate is (2 × π × 32) + (2 × π × 3 × 9) = 226.19 in3.

Coating: Multiply the surface area you are coating by the required thickness. For example, if you are coating 5000 in2 with a 1/4" of material, the total volume to estimate is 5000 × (1/4) = 125 in3.

Helpful Volume References

  • Block: V = lwh
  • Cone: V = πr(r + l)
  • Cylinder: V = 2πr2 + 2πrh
  • Sphere: V = 4πr2
  • Square Pyramid: V = ⅓ × lwh
Result: 0lbs
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Volumetric Yield

How much volume will a specific weight of material yield? Use the calculator below to convert weight to volume.

1)  (in3/lb) OR
Result: 0lbs
Some error text

Although we do our best to ensure accuracy, Reynolds Advanced Materials offers no warranties, promises, and/or representations of any kind, either expressed or implied, as to the accuracy, completeness, or reliability of the information contained in these tools, nor suitability of the information contained herein to your particular circumstances. Reynolds Advanced Materials assumes no liability for losses or damages of whatever nature (direct, indirect, consequential or other) associated with your use, or inability to use, these tools, or from your use (or failure to use) the information contained herein.

Accounting for Waste

You may consider adding 5% – 10% to any material estimate to account for waste, such as material sticking to the sides of your mixing containers, stir sticks, etc. In almost all cases, it is better to have too much material on-hand than not enough.