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 Estimator
Scale from 1 prototype to full production run
Step-by-Step Pour Plan
- Seal live wood edges with a thin brush coat of epoxy to prevent bubble off-gassing.
- Clamp wood firmly into the mold box with Tyvek tape and silicone-sealed corners.
- 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
Project Calculation Summary
Studio Batch of 1 project for River Table (120x60x3.8 cm): • Per Single Project: 5417g Resin (A) + 2709g Hardener (B) [Total: 8126g]. • Total Studio Run (1 Units): 5417g Resin (A) + 2709g Hardener (B) [Total Mass: 8126g / 8.13 kg]. • Mix Ratio: 2:1 | Buy Recommendation: 1x 2-Gallon Pro Kit.
MakerRatio • Studio Workshop Batch Sheet
https://makerratio.com • Precision Craft Formula Record
Date: _______________
Batch #: ____________
Project: Let's Resin Deep Pour (river x 1)
Category: Epoxy Resin
Dimensions: River Table: 120x15x3.8 cm (x1)
Mix Ratio: 2:1 | Batch: 1 project(s)
Specific Gravity: 1.08 g/ml
Safety Spill Margin: 10%
Batch Mix Breakdown (By Exact Weight)
Workshop Safety & Quality Protocol:
[ ] Ambient room temp 70°F–78°F (21°C–25°C) & mold leveled.
[ ] Protective nitrile gloves on & workspace ventilation active.
[ ] Mix thoroughly scraping sides and bottom for 3 full minutes.
[ ] Verify pot life and demold window per manufacturer TDS.
Curing Schedule Log:
Pour Time: ___________
Gel / Tack-Free: ______
Demold Time: ________
Recommended Materials & Tools for this Project
LET'S RESIN 2:1 Deep Pour Epoxy Kit
Formula: 2:1 mix ratio by volume/weight. Formulated for deep single pours up to 2–4 inches per layer with low viscosity self-degassing.
High-Gloss Sheathing Mold Release Tape
Specification: Heavy-duty polypropylene barrier tape. Prevents epoxy adhesion when building custom melamine river table mold forms.
Transparency Notice: As an Amazon Associate, MakerRatio earns from qualifying purchases at zero extra cost to you. Product recommendations are selected based on verified Manufacturer Technical Data Sheets (TDS). Always consult chemical safety data before pouring.
How 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.