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Tabletop flood coat calculator

For bar tops, tabletops and sealing a finished river table: surface area times coat thickness, for as many coats as you plan, plus an optional thin seal coat.

1Surface

Length

Width

Coat the edges too

2Coats

Thickness per coat

Number of flood coats

Waste buffer

Add a seal coat first
A thin skim coat seals the wood so air rising out of the pores doesn't bubble up through the flood coat.

3Check against a product

Optional

Epoxy

Weight setting

Mixed density

g/mL

Flood coat basics

Plan two coats on wood. Wood Magazine: "A single thick coat can result in trapped bubbles as air rises out of the wood pores, so plan to apply two coats. A thin first coat allows the air to escape."
Respect the per-coat limit. Many tabletop epoxies self-level at about 1/8 in. East Coast Resin says no more than 3/16 in per flood coat; TotalBoat TableTop allows 1/4 in per coat.
Mind the window. Recoat times are product-specific, for example 4–10 h between flood coats for East Coast Resin, or at least 3 h between 1/4 in layers for TotalBoat TableTop.
Quick sanity check. 1 US gallon is 231 cubic inches, which covers about 12.8 sq ft at 1/8 in. TotalBoat's guide uses 12 sq ft per gallon at 1/8 in as a rule of thumb.