Enter the cavity dimensions to calculate raw resin volume, add a practical waste allowance and estimate the purchase quantity in litres or US gallons. Product compatibility must still be checked against the manufacturer's maximum pour depth and temperature guidance.
Calculate quantity first. Product matching only uses verified manufacturer data.
Best Match uses technical fit first. Best Value and Lowest Waste are awarded only when the full current kit-price set has been verified.
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Price data is older than 30 days or incomplete. This cost is not used for Best Value or Lowest Waste until pricing is refreshed.
Technical source ↗Data last verified 2026-09-13Price data is older than 30 days or incomplete. This cost is not used for Best Value or Lowest Waste until pricing is refreshed.
Technical source ↗Data last verified 2026-09-13Price data is older than 30 days or incomplete. This cost is not used for Best Value or Lowest Waste until pricing is refreshed.
Technical source ↗Data last verified 2026-09-13For a rectangular cavity, multiply length × width × pour depth. That gives the raw geometric volume. EpoxyCalc converts the result into litres and US gallons, then shows the waste allowance separately so the purchase quantity is not hidden inside the formula.
A cavity measuring 48 × 12 × 2 inches has a raw volume of 1,152 cubic inches, or about 4.99 US gallons (18.9 litres). With a 10% allowance, the planning quantity becomes about 5.49 gallons (20.8 litres).
Two products can both be sold as deep-pour epoxy and still have different maximum depths. Published limits can also change with project type and temperature. The calculator therefore treats volume and product compatibility as separate decisions instead of assuming every deep-pour resin can handle the same thickness.
If your project depth is greater than a product's verified maximum for the relevant conditions, the job may require multiple pours or a different epoxy system. EpoxyCalc's product matcher uses manufacturer-published depth information where it is available.
The exact allowance depends on how accurately the cavity can be measured and how much material is likely to remain in mixing containers or tools. Use the waste control in the calculator instead of relying on a hidden fixed percentage.
Building a live-edge river table? Use the river table epoxy calculator for changing river widths. You can also compare deep pour epoxy comparison after calculating your required quantity. Planning an EPODEX project? Use the EPODEX calculator for quantity planning against the verified ECO+ / PRO+ technical data. Using TotalBoat Fathom? The TotalBoat epoxy calculator checks quantity against its verified project-specific pour limits. For Liquid Glass Deep Pour, use the Super Clear epoxy calculator with the verified 2:1 volume ratio and published depth guidance.