Epoxy Resin Calculator
Enter the dimensions of your project and get the amount of epoxy resin required (including hardener) in seconds.
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Metric (cm/meters)
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Advanced Options
A seal coat is a thin layer applied first to prevent air bubbles. A flood coat is the final thick layer for a glossy finish.
Account for resin that drips over the edges of your project, common with river tables and similar projects.
Extra resin to account for spills, mixing losses, measurement errors, and unexpected needs.
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Porous surfaces like wood may absorb more resin, requiring additional material.
Your Epoxy Requirements
Raw Volume:
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Resin Required:
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Hardener Required:
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Total Mixture:
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Note: This is an estimate only — always round up and follow manufacturer instructions. Different epoxy brands may have slightly different densities and mix ratios.
Frequently Asked Questions
Why add 10% extra resin for wastage?
Adding a 10% buffer accounts for common issues like resin sticking to mixing containers, small spills, measurement inaccuracies, and unexpected surface absorption. It’s better to have a little extra than to run short mid-project.
How do I convert thickness from fractions to decimals?
Common conversions: 1/8″ = 0.125, 1/4″ = 0.25, 3/8″ = 0.375, 1/2″ = 0.5, 5/8″ = 0.625, 3/4″ = 0.75, 7/8″ = 0.875. For other fractions, divide the top number by the bottom number (e.g., 3/16 = 3 ÷ 16 = 0.1875).
What’s the difference between a seal coat and flood coat?
A seal coat is a thin initial layer that seals porous surfaces and prevents air bubbles. A flood coat is a thicker final layer that creates a smooth, glossy finish. Many projects use both: a seal coat first, then after it cures, a flood coat.
How accurate is this epoxy calculator?
This calculator provides a reliable estimate based on standard epoxy density and your project dimensions. However, actual requirements may vary based on specific brand density, temperature, mixing technique, and project specifics. Always purchase slightly more than calculated.