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Concrete & Masonry

Epoxy / Resin Calculator

Calculate epoxy volume for river tables, bar tops, and coatings from length, width, and pour depth.

Epoxy needed

175.5 fl oz

1.371 gallons mixed total with waste

Cups
21.94
Gallons
1.371
Liters
5.19
Estimated cost
$123.43
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1 cubic inch ≈ 0.554 fl oz. Confirm mix ratio and max pour depth on your resin’s technical data sheet.

How this calculator works

Epoxy volume is length × width × depth. Convert cubic inches to fluid ounces (1 cu in ≈ 0.554 fl oz), then to gallons if needed.

Deep pours may require layered casts. Always follow the resin system’s maximum pour depth and mix ratio.

fl oz ≈ length × width × depth (inches) × 0.554

  • Measure the void or coating area carefully
  • Order 10% extra for cup cling and spills
  • Respect max pour depth for your epoxy brand

Frequently asked questions

How much epoxy do I need for a river table?

Measure the river void’s average length, width, and depth in inches, multiply for cubic inches, then convert to ounces or gallons. Add waste - epoxy shortages are expensive mid-pour.

How many ounces of epoxy in a gallon?

One US gallon is 128 fluid ounces. Divide your ounce requirement by 128 to get gallons of total mixed epoxy.

Does this include hardener ratio?

The calculator estimates total mixed volume. Split that total using your product’s ratio (for example 1:1 or 2:1 resin to hardener).

Keep planning your project with these tools, or browse the Concrete & Masonry category.