Epoxy & River Table Calculator
Calculate the exact number of gallons or quarts needed for massive woodworking river tables, bar tops, and countertops. Get automated purchasing pack guides and step-by-step pour guides.
Epoxy & River Table Calculator
Step-by-Step Pour Plan
- Construct a sealed mold box and apply mold-release spray or tape.
- Secure the wood slabs using clamps to prevent them from floating in the liquid resin.
- Perform a thin seal coat on the edges of the wood to seal air channels (cure for 12 hours).
- Pour the main river channel layer (up to 2 inches thick per pour).
- Pop air bubbles periodically using a heat gun or torch.
- Allow 72 hours for full cure before planning, sanding, and polishing.
Measurement Outputs
Contextual Shopping Kit
Perfect for river tables and deep mold castings up to 2 inches thick.
View on AmazonHeavy-duty high-gloss sheathing tape for constructing river table mold boxes.
View on AmazonIdeal for popping air bubbles in epoxy resin castings and candle making.
View on AmazonHow to Calculate Epoxy Volume for River Tables
River tables combine natural live-edge wood slabs with colored epoxy resin. Because live edges are organic and uneven, the width of the river channel changes along the length of the table. To estimate the volume accurately, you must measure the river width at regular intervals (every 6 inches) and average those values.
River Volume (Gallons) = [Length (in) × Avg Width (in) × Depth (in)] / 231
The constant 231 represents the number of cubic inches in a single US gallon. Always add a waste factor of 10% to account for spills, wood absorption, and resin remaining on mixing bucket walls.
Deep Pour vs. TableTop Epoxy
Epoxy systems are chemically formulated for specific thickness ranges. Using the wrong system can result in project failure:
- TableTop Epoxy (1:1 Ratio): Designed for thin protective coatings up to 1/8" thick. It cures rapidly (12-24 hours) because the heat generated (exothermic reaction) dissipates quickly. If poured deeper than 1/4", standard tabletop epoxy will overheat, yellow, smoke, and crack.
- Deep Pour Epoxy (2:1 or 3:1 Ratio): Designed for deep castings from 1" to 2" thick per layer. It is formulated to cure slowly (48-72 hours), preventing thermal runaway. Poured too thin, it may take days to solidify or remain tacky.
The Multi-Layer Pouring Process
For thick projects like river tables, a multi-layer pour is often necessary. A thin "seal coat" is first brushed onto the raw wood slabs. This seals the pores, preventing wood fibers from releasing air bubbles into the main pour. Once the seal coat is tacky (usually 4-6 hours), the primary deep flood pour can begin.
Our calculation tool takes your thickness inputs and automatically suggests standard retail kit sizes to ensure you buy exactly what you need without expensive excess.