Epoxy Calculator: How Much Resin Do You Need?

Your details

Length of the rectangular surface along its longest side.
in
Width of the rectangular surface.
in
Desired final thickness of the flood coat layer. Select 1/8 in for a standard bar-top or countertop finish.
Most projects use 1 flood coat. Add a second for extra depth or clarity.
A seal coat is a thin initial layer (about 8 mils) applied to porous surfaces like wood to prevent bubbles in the flood coat.
Check your epoxy product label. Getting this ratio wrong prevents proper curing.
Extra epoxy to account for drips, spills, and surface absorption. 10% is standard.
Enter the cost per mixed gallon to estimate total material cost. Leave at 0 to skip.
USD
Total epoxy needed
65.8fl oz

Total mixed epoxy volume including waste allowance

Total gallons0.514gal
Total liters1.95L
Part A (resin)43.9fl oz
Part B (hardener)21.9fl oz
Surface area6ft²
Part A (resin)43.9
Part B (hardener)21.9

You need 65.8 fl oz (0.51 gal) of mixed epoxy.

  • You need 65.8 fl oz (0.51 gal) of mixed epoxy, split into 43.9 fl oz Part A and 21.9 fl oz Part B at a 2:1 ratio.
  • Your surface area is 6.00 ft², giving a coverage rate of about 11.7 ft² per gallon at 0.125 in thick.

Next stepAlways do a test pour to confirm your mixing ratio by weight or volume before committing to a full project. Temperature below 70 F can slow or prevent curing.

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