How much epoxy do I need for a countertop?

Multiply countertop length by width by the intended wet epoxy depth to estimate volume, then add a practical allowance for edges, mixing losses and surface variation.

How thick should an epoxy countertop coat be?

There is no universal thickness for every system. Use the coating thickness and application method specified by the manufacturer for the exact countertop or flood-coat product.

Do countertop edges need extra epoxy?

Yes, vertical edges and drips can increase consumption. The calculator handles the main rectangular surface, so use the waste allowance when edges and losses are significant.

Epoxy countertop calculator

Calculate how much epoxy your countertop needs.

Enter the countertop length, width and planned epoxy depth to estimate resin volume, add a waste allowance and compare compatible epoxy systems. Metric or Imperial stays synchronized with the rest of EpoxyCalc.

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Countertop calculator

Calculate quantity first. Product matching only uses verified manufacturer data.

Buying regionLength (mm)Width (mm)Pour depth (mm)Waste allowance (%)Room temperature (°C)

Recommended purchase quantity21.78 L5.75 US gal

Calculated volume19.80 L

Waste allowance10%

Resin classCoating / tabletop epoxy

Pour depth50 mm / 1.97 in

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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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How to calculate epoxy for a countertop

For a rectangular countertop, start with the coated surface length × width × wet epoxy depth. EpoxyCalc converts that geometry into litres and US gallons, then keeps your waste allowance visible instead of hiding it inside the formula.

Countertop flood coat versus deep pour

Countertop coatings are normally much thinner than deep-pour castings. A product designed for thick pours is not automatically the best choice for a thin decorative or protective surface coat. Product compatibility should be checked against the manufacturer's intended application and layer guidance.

Allow for edges, drips and mixing losses

A simple rectangular calculation describes the horizontal surface. Real jobs can consume more resin because of vertical edges, rounded profiles, drips, mixing containers, tools and surface irregularities. Use the waste control to build that uncertainty into your purchase estimate.

Example countertop calculation

A 2.4 m × 0.6 m countertop has 1.44 m² of surface area. At a 1 mm wet layer, the theoretical geometric volume is about 1.44 litres before edge losses and waste. A thicker coating increases consumption in direct proportion to the layer depth.

Planning a bar top instead?

For bars, tabletops and flood coats, use the tabletop and bar top epoxy calculator. For thick cavities or castings, use the deep pour epoxy calculator.