Epoxy Resin Calculator
Gallons of epoxy for river tables, countertops, and garage floors. Updated for 2026.
Last reviewed July 2026 · Free · Nothing you enter is stored
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Planning estimate using standard formulas and 2026 national average prices — confirm quantities with your supplier and get local quotes.
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How this calculator works
Volume math: one gallon is 231 cubic inches, which covers 1.604 sq ft at 1 inch thick — so gallons = area × thickness ÷ 1.604. That's 12.8 sq ft per gallon at 1/8" and 25.6 at 1/16". Garage floor epoxy coatings are different animals, covering roughly 225 sq ft per gallon as a thin film. Add 10% for mixing losses and edge run-off.
Frequently asked questions
How much epoxy for a river table?
Measure the void, not the table: void length × average width × depth in inches ÷ 1.604 = gallons. A typical 6-ft river void (60" × 6" × 1.5") needs about 2.4 gallons of deep-pour resin, poured in lifts.
How much does epoxy resin cost?
Quality table-top and deep-pour epoxy runs $50–$150 per gallon kit (resin + hardener combined volume). Garage floor epoxy kits cover a 1-car bay for $50–$150; premium polyaspartic systems cost several times more.
Can I pour epoxy in one thick layer?
Only with deep-pour (casting) resin rated for it — typically 2–4" per lift. Table-top epoxy poured thick overheats, yellows, and can crack. Check your product's maximum pour depth and wait for each lift to gel.
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