Epoxy Resin Volume Calculator

Professional estimation for artists and makers worldwide.

Rectangle
Circle
Required Volume
0
Liters
Total Weight: 0 kg
*Estimates based on typical epoxy density (1.1 g/cm³ or 0.636 oz/in³).
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🧪 Ready to mix? Find the exact parts for your resin and hardener with our Dilution Ratio Calculator.

The Essential Guide to Epoxy Resin Estimation

Epoxy resin is a high-performance thermosetting polymer consisting of two parts: the resin and the hardener. When combined, they undergo an exothermic chemical reaction that transforms the liquid into a durable, glass-like solid. Whether you are creating a "River Table," jewelry, or industrial flooring, the success of your project depends on precise volume calculation.

How to Calculate Resin Volume Manually

To find the required volume, you first need to determine the surface area of your project and then multiply it by the desired thickness (pour depth).

Rectangular Pours

V = L × W × D

Example: For a 48" × 24" table with 2" depth:
48 × 24 × 2 = 2,304 in3.

Circular Pours

V = π × r2 × D

Example: For a 20" diameter ($r=10$) at 1" depth:
3.14 × 102 × 1 = 314 in3.

Understanding Mixing Ratios (1:1 vs 2:1)

Not all resins are the same. Our calculator provides the Total Volume, but you must check your product's label for the specific mixing ratio. The two most common types are:

  • 1:1 Ratio: Common for "Table Top" or coating resins. You need equal parts of resin and hardener.
  • 2:1 Ratio: Typical for "Deep Pour" or casting resins. The resin volume is double that of the hardener.
Pro Tip: To calculate the specific parts for a 2:1 ratio, divide your total volume by 3. One part is hardener, and two parts are resin.

Conversion Quick-Reference

If you are calculating manually in inches but buying resin in gallons or ounces, use these standard conversions:

  • 1 Gallon (US) = 231 in3 (cubic inches)
  • 1 Fluid Ounce (US) ≈ 1.805 in3
  • 1 Liter = 1,000 cm3 (cubic centimeters)

Advanced Tips for a Perfect Pour

  1. Surface Preparation: Epoxy will not bond to oily or greasy surfaces. Clean your mold or wood with Isopropyl Alcohol before pouring to prevent delamination.
  2. Temperature Matters: Ideal working temperature is usually 70-75°F (21-24°C). If it's too cold, bubbles won't escape; if it's too hot, the resin may "flash cure" and crack.
  3. The "Waste Factor": Always add 5-10% extra to your calculation. It is much better to have a little left over in the cup than to be 100ml short when the pour is almost finished.

Frequently Asked Questions

How much epoxy do I need for a 24" x 24" table?

For a 1-inch thick coating on a 24" x 24" surface, you need 576 cubic inches. This converts to approximately 2.49 US Gallons or 9.44 Liters.

Why did my resin turn cloudy or yellow?

Cloudiness usually indicates moisture contamination or improper mixing. Yellowing is often caused by UV exposure; always look for "UV Resistant" resins for projects that will be near windows.