How Much Epoxy Do You Need for a Table Top?

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For a standard 1/8″ flood coat, plan on about 1 gallon of mixed epoxy per 12.8 sq ft, plus a seal coat and 10–20% extra for drips over the edges. A 6′ × 3′ dining table (18 sq ft) needs about 1.4 gallons for the flood coat alone and about 2.2–2.4 gallons with a seal coat and margin.

Below is the formula, a sizing table, and the product limits that decide how many coats you’ll pour.

The formula

Gallons = length (in) × width (in) × thickness (in) ÷ 231

231 cubic inches = 1 US gallon. For metric: liters = gallons × 3.785.

Coat thickness	Coverage per gallon	Gallons per sq ft
1/16″	~25.6 sq ft	0.039
1/8″	~12.8 sq ft	0.078
1/4″	~6.4 sq ft	0.156

TotalBoat’s TableTop Epoxy TDS confirms the math: a 1-gallon kit covers 6.4 sq ft at 1/4″.

Common table sizes (1/8″ flood coat, no margin)

Table	Top area	Gallons	Liters
24″ × 24″ end table	4 sq ft	0.31	1.2
48″ × 24″ desk	8 sq ft	0.62	2.4
60″ × 30″ desk/table	12.5 sq ft	0.97	3.7
72″ × 36″ dining	18 sq ft	1.40	5.3
84″ × 40″ dining	23.3 sq ft	1.82	6.9
96″ × 42″ conference	28 sq ft	2.18	8.3
48″ round	12.6 sq ft	0.98	3.7

For a round top: π × radius² × thickness ÷ 231. A 48″ round is 3.1416 × 24² × 0.125 ÷ 231 = 0.98 gal.

Don’t skip the seal coat

Wood releases air as epoxy soaks in, which shows up as bubbles in the flood coat. TotalBoat’s instructions call for a thin seal coat on wood first. They estimate about 24 sq ft per gallon kit for the seal coat (wood absorption varies a lot). For the 72″ × 36″ table, that’s roughly 0.75 gallon.

Add a margin for edges and waste

A flood coat runs off the edges. Most of what drips is lost unless you catch it. Also count:
– Edges: add the edge area (perimeter × edge thickness) if you’re coating the sides.
– Uneven or live-edge tops: low spots hold more resin.
– Mixing leftovers: residue in cups and on stir sticks.

A 10–20% margin is a common rule of thumb. Use the higher end for live edges and porous wood.

Worked example: 72″ × 36″ dining table

1. Seal coat: 18 sq ft ÷ 24 sq ft/gal ≈ 0.75 gal
2. Flood coat at 1/8″: 72 × 36 × 0.125 ÷ 231 = 1.40 gal
3. Edges, 1.5″ thick: perimeter 216″ × 1.5″ × 0.125″ ÷ 231 = 0.18 gal
4. Subtotal 2.33 gal; with a 10% margin, about 2.6 gal, i.e. three 1-gallon kits, mixed in separate batches

Product limits that change the plan

Product	Max per coat	Mix ratio	Working time	Recoat / cure	Source
TotalBoat TableTop	1/4″	1:1 by volume (1.2:1 by weight)	~40 min (pot life ~20 min)	Next coat after ~3 h; light use 48 h; full cure 5–7 days	TotalBoat TDS
Stone Coat Countertop Epoxy	1/8″ recommended per application; 0.25″ max casting	1:1 by volume	45–55 min	Full cure 7 days (TDS)	Stone Coat TDS

TotalBoat also says to mix no more than 1 gallon at a time and to apply at 65–80°F. Its heat resistance (HDT) is listed at 118°F, so use trivets under hot dishes.

For tops thicker than 1/4″, you need multiple coats, or a deep-pour resin for the fill (see best deep pour epoxy for river tables).

Use the calculator

Our epoxy calculator has a top-coat field: enter table length, width and coat thickness, and it adds the result to any river volume. Its river table tab handles the full project.

FAQ

How much epoxy for a 4′ × 8′ table top? 48 × 96 × 0.125 ÷ 231 = 2.49 gallons at 1/8″, before seal coat and margin.

How thick should a table top epoxy coat be? 1/8″ is the common flood coat. TotalBoat TableTop allows up to 1/4″ per coat; Stone Coat recommends 1/8″ per application.

How much does 1 gallon of epoxy cover? About 12.8 sq ft at 1/8″ or 6.4 sq ft at 1/4″.

Products: TotalBoat TableTop Epoxy · Stone Coat Countertop Epoxy

Sources

• TotalBoat TableTop Epoxy Instruction Sheet & TDS (coverage, mix ratio, pot life, cure, HDT; fetched October 2026).
• Stone Coat Countertops, Countertop Epoxy TDS.
• NIST Handbook 44 (231 cu in per US gallon).