River table cost depends on the actual channel volume and the resin class needed for the pour. This guide explains the cost drivers before sending users to the calculator.
Direct Answer
Calculate the river volume, add chosen allowances, then multiply the mixed quantity by your supplier's price per mixed gallon or liter. A 72 × 6 × 1.5 in channel with 25% total allowances needs 3.51 gal; at an illustrative $100 per mixed gallon that is $350.65 before kit rounding, tax and shipping.
Takeaways
A live-edge channel is rarely a perfect rectangle. Segment measurement, seal coat, leaks, and depth limits all affect the final resin quantity and therefore the resin budget.
It does not estimate slab cost, milling, flattening, pigment, forms, finish, tools, or labor. It is focused on resin material cost.
The channel holds 648 in³ / 231 = 2.805 gal. The river calculator's default 12% waste plus optional 8% seepage and 5% seal coat produce 2.805 × 1.25 = 3.506 gal. At an assumed $100 per mixed gallon, material used is worth about $350.65. If the supplier sells 2 gal mixed kits at $200 each, you buy two kits for $400 and have roughly 0.49 gal left. These are arithmetic examples, not current market prices.
| Budget line | Example amount |
|---|---|
| Raw channel | 2.81 gal |
| With selected allowances | 3.51 gal |
| Calculated resin value at $100/gal | $350.65 |
| Purchased mixed resin: two 2 gal kits | $400 |
| Tax, shipping, pigments and tools | Add actual quotes separately |
For a 2:1 volume-ratio product, 1 gal of resin plus 0.5 gal of hardener makes a nominal 1.5 gal mixed kit. If it costs $150, its comparable price is $100 per mixed gallon, not $150 per gallon. Check the package listing for what its headline quantity means. Weight-based kits cannot be converted to gallons from weight alone without the product's density information.
Changing the average river width from 6 to 7 in increases this raw volume from 2.81 to 3.27 gal. At the same 25% allowance, the order changes from 3.51 to 4.09 gal, which would require a third 2 gal kit in the example. Remeasure a costly irregular channel with segments, price any full-table finish separately, and verify the chosen resin is rated for the required casting conditions.
Distinguish the resin order from each batch. A budget may cover several complete kits even though product limits require smaller batches and staged lifts. Retain the per-kit price and mixed yield alongside the continuous price per liter/gallon; the rounded purchase amount can cost more than the exact geometric estimate.
FAQ
River tables have irregular geometry and deep-pour constraints, so a generic quantity input can hide the biggest cost drivers.
Often it does, but actual pricing depends on brand, kit size, and availability. The important point is to compare products that can handle the required depth.
Yes when the wood is porous or the live edge can leak or release bubbles. Treat it as a separate buffer rather than hoping the main pour covers it.
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Reviewed · Calculation notes and corrections