How to Calculate Resin for River Tables

Stop guessing. Whether you are pouring a live-edge river table or casting silicone molds, getting the mixing ratio right is the difference between a crystal-clear finish and a sticky, uncured disaster.

The Math Behind the Pour

Our tool uses the industry-standard fluid dynamics formula: Length × Width × Depth. However, simply knowing the cubic inches isn't enough. We divide the volume by 1.805(the specific density of mixed epoxy) to give you the exact fluid ounces needed.

Why the 5% "Waste Buffer" Matters

Professional makers never mix exactly what the mold requires. You lose material to:

• Resin sticking to the sides of your mixing bucket.
• Minor leveling issues in your workspace.
• Absorption into wood (if doing a river table).

Pro Tip: Always toggle the "5% Waste Buffer" on. It is cheaper to mix an extra ounce of premium resin than to ruin a $200 slab of Walnut because you ran short. Ensure you use graduated mixing cups for precision.

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