calcs.homes
calcs.homes
Enter your surface area, pour thickness, and mix ratio to find exactly how much resin and hardener to mix for a tabletop, river table, or coating.
Estimate only — pour in thin layers (under 1/4 in / 6 mm at a time) to avoid overheating and cracking.
We multiply surface area by pour thickness to get total volume, convert that figure to fluid ounces (or milliliters), then split it between resin and hardener using the parts you enter for each — a 1:1 ratio splits it evenly, while a 2:1 or 3:1 ratio weights more of the mix toward the resin side.
Mixing by volume parts is how most tabletop and casting epoxies are formulated, since the exact resin-to-hardener chemistry differs by brand and product line. Getting that ratio right matters more here than with most adhesives — under- or over-catalyzed epoxy can stay permanently soft, tacky, or cloudy instead of curing hard, so always confirm the ratio printed on your specific product before mixing.
Multiply the tabletop's area by your target coat thickness (1/8 in is typical for a single coat) — enter your dimensions above for an exact resin and hardener split.
Most tabletop epoxies are only rated for thin pours (around 1/8-1/4 in per layer) — thicker single pours generate heat as they cure and can crack, yellow, or never fully harden. Deep pours (river tables) need a specific deep-pour formulation instead.