Epoxy Calculator

Epoxy systems combine resin and hardener in a manufacturer-specified ratio. Once mixed, the components react and cure into a durable thermoset material used for floors, coatings, castings, repairs, laminates, and many other applications. Accurate quantity planning helps avoid running short during a time-sensitive pour while limiting expensive surplus. This calculator converts surface area and finished layer thickness into mixed volume, adjusts for application efficiency, and divides that volume into resin and hardener portions. The metric geometry is especially convenient: one square meter covered one millimeter thick requires exactly one liter of material. The theoretical volume is therefore area multiplied by thickness. Dividing by the efficiency expressed as a decimal increases the order quantity to cover losses from containers, tools, surface texture, absorption, spills, and application technique. An efficiency of ninety-five percent means only ninety-five percent of prepared material is expected to become the intended uniform layer. Density converts adjusted liters to kilograms, and the entered price per kilogram produces the material cost. Mixing ratios are treated as component parts. For a two-to-one system, resin is two thirds of total mixed volume and hardener is one third. This calculation assumes the displayed ratio is by volume. Some manufacturers specify ratios by weight, and resin and hardener can have different densities. In that case, follow the technical data sheet and use weight-based measurements rather than these volume portions. Thickness strongly affects the result. Doubling thickness doubles volume, weight, and cost. However, a nominal wet-film thickness may not equal cured thickness for every formulation. Porous or rough concrete can consume substantially more material, and multiple coats may have different coverage rates. Primers, broadcast aggregate, decorative flakes, topcoats, edge details, vertical surfaces, and material left in mixing vessels should be planned separately when they are not represented by the chosen efficiency. Before mixing, confirm surface preparation, ambient and substrate temperature, humidity, pot life, induction time, recoat window, and cure schedule. Large batches can generate dangerous heat and may cure much faster than expected, so divide the total into batch sizes allowed by the manufacturer. Wear specified protective equipment and provide ventilation. Use this estimate for ordering and batch planning, but let the product data sheet govern ratio, measurement method, maximum pour depth, application conditions, and safety procedures.