Epoxy kit & cost calculator

The calculator compares up to three kit sizes. Check whether your kit is named by both parts together or by the resin (Part A) alone — brands do both, and there’s a setting for it. The price fields start empty: type in the prices you’re actually seeing to get costs, price per gallon and the cheapest combination.

Turning volume into kits

Epoxy calculators give you a volume. Stores sell kits. The gap between the two is where most budget surprises come from: you round up to whole kits, bigger kits often cost less per gallon, and a leftover half-gallon is money spent. This calculator does the rounding and shows you the leftover so you can decide whether a different kit size fits better.

kits = epoxy needed ÷ mixed kit size (round up)
cost = kits × price per kit
leftover = kits × mixed kit size − epoxy needed
price per gallon = price per kit ÷ mixed kit size

Example: a project that needs 3 gallons. In 2-gallon kits that’s 2 kits and 1 gallon left over. In 1-gallon kits it’s exactly 3 kits. Add a third size — say a half-gallon kit — and enter the prices you’re seeing for each. The calculator shows the price per gallon of every size side by side, and checks every combination (one 2-gallon kit plus one 1-gallon kit, or two 1-gallon kits plus two half-gallon kits…) to report the cheapest.

Watch how kits are named

A “1 gallon kit” might contain 1 gallon of mixed epoxy (half a gallon of each part), or 1 gallon of resin plus a separate quantity of hardener. TotalBoat’s TableTop 1-gallon kit, for example, is half a gallon of Part A plus half a gallon of Part B. If the box names only the resin, set The kit size on the box is to Part A only and enter the mix ratio: the calculator works out what each kit makes once mixed.

mixed kit size = Part A size × (A + B) ÷ A
e.g. 1 gal of 2:1 resin → 1 × 3 ÷ 2 = 1.5 gal mixed

For a 2:1 kit that’s half as much again as the name; for a 5:1 marine kit it’s a fifth more. 2:1 epoxy by weight shows how the parts of a 2:1 system split. Kits sold by weight (common in metric) typically hold a little under 1 liter per kilogram of mixed epoxy, depending on density — how much a gallon of epoxy weighs walks through the conversion, and the volume & weight converter does it for any kit.

Product kit sizes

Pick a product and the notes list the kit sizes its maker sells, from the maker’s page (checked 2026-09-30): MAS Deep Pour X in 1.5, 3 and 6 gallon kits; EcoPoxy FlowCast in 6, 12, 30 and 60 L kits; TotalBoat TableTop in 2 quart, 1, 2 and 4 gallon kits. Prices aren’t filled in — they change too often — so type the ones you’re seeing. Always check the data sheet (TDS) and the listing for whether a size means both parts or the resin alone.

Budget beyond the resin

• Mixing buckets, stir sticks and a drill paddle for big batches.
• Tape, sealant and melamine or HDPE for forms.
• Sandpaper in several grits, plus polish if you’re finishing to a gloss.
• Gloves and eye protection — and a respirator if the product or the sanding calls for one.

This page doesn’t quote prices: epoxy prices vary widely by brand, kit size and retailer, and change often. The price fields start empty — the grey numbers in them are examples only — so the costs you see are always the ones you typed in.