Resin Calculator

Multiply the piece's area by its depth to get its volume — 1 cubic centimetre holds 1 ml of resin. For a circle the area is π × radius²; for a rectangle it is length × width. Add about 10% for what stays in the cup and on the stirrer.

Area × coat thickness. A usual coat is 2–3 mm, so a 30 × 30 cm board at 2 mm takes 30 × 30 × 0.2 = 180 ml, about 200 g of mixed resin, plus 10% extra — roughly 220 g.

Area × the mould's depth. A 10 cm round coaster mould 5 mm deep holds π × 5² × 0.5 ≈ 39 ml, about 43 g; add 10% for the cup and stirrer. Deep moulds may need casting resin, or several layers of art resin.

Coating is a thin glossy layer, usually 2–3 mm, flooded over a board, canvas or wood and spread with a spatula. Casting fills a mould to its full depth and sets solid. Many pieces use both: cast first, then a top coat once it has cured.

Divide what you paid for the set by its total weight (resin + hardener together), then multiply by the grams your piece needs. A ₹1,200 1 kg set works out to ₹1.2 a gram, so a 190 g set of coasters costs about ₹228 in resin.

About 110 g. Mixed epoxy weighs roughly 1.1 g per ml.

Fill it with water, pour the water into a cup on a kitchen scale and read the grams — 1 g of water is 1 ml, so that is its volume. Dry the mould completely, then mix about 10% more resin than that.

Art and coating resins cure cleanly to about 6 mm a pour; deeper pieces go in layers, each left to gel before the next. Deep-pour or casting resins can go much thicker — follow your bottle.