One gallon covers very different areas depending on whether you are sealing wood, flooding a tabletop, or coating concrete. Thickness is what decides it.
Direct Answer
At the common 1/8 in tabletop flood coat, one mixed gallon covers about 12.8 sq ft; at 1/16 in about 25.7 sq ft; and as a thin 1/32 in seal coat about 51 sq ft. Floor coatings go on much thinner: about 160 sq ft per gallon at 10 mils and 80 sq ft at 20 mils, per coat.
Takeaways
| Application | Thickness | Coverage per gallon |
|---|---|---|
| Floor coating, thin coat | 10 mils (0.25 mm) | About 160 sq ft |
| Floor coating, thick coat | 20 mils (0.5 mm) | About 80 sq ft |
| Seal coat on wood | 1/32 in (0.8 mm) | About 51 sq ft |
| Thin flood coat | 1/16 in (1.6 mm) | About 25.7 sq ft |
| Tabletop flood coat | 1/8 in (3.2 mm) | About 12.8 sq ft |
| Thick pour | 1/4 in (6.4 mm) | About 6.4 sq ft |
Raw coverage of one mixed gallon (Part A + Part B). Plan on 10–15% less for runoff, edges, and cup loss. HomeGuide (2026) puts typical floor epoxy at 80–200 sq ft per gallon.
Labels may describe floor coating coverage, flood coat coverage, or mixed kit volume. Compare products only after you know the intended application and thickness.
Typical thickness for each job, in mils and inches, with square feet per gallon.
Check the product data sheet for recommended thickness, working time, coverage range, maximum pour depth, and whether the stated kit size is mixed volume.
The geometry inversion is area in ft² = 231 ÷ (144 × thickness in inches). At 1/8 in that is 12.833 ft² before losses. A 10% allowance reduces the area that a fixed purchased gallon can cover to about 11.667 ft² under that geometric model. Use label coverage when the product supplies one for your application. The epoxy thickness and coverage chart runs the same formula from 5 mils to 1 inch.
FAQ
Coverage ranges depend on thickness, substrate, application method, and whether the product is a floor coating or a tabletop resin.
No. Deep pours should be calculated by volume and product depth limit, not square-foot coverage.
Use it only for smooth surfaces and thin coats. For rough or porous surfaces, plan conservatively.
Related Pages
How thick is epoxy? Typical thickness for garage floors (10-20 mils), tabletops (1/8 inch), and deep pours, plus square feet per gallon at every thickness.
Enter square feet (or m²) and coat thickness to see how many gallons of epoxy you need, with edge runoff, waste, and cost for tabletops, bar tops, and countertops.
How much epoxy a garage or basement floor needs: turn square feet, coats, and your kit's coverage rate into gallons and kits to buy, with waste and material cost.
Resin material cost per square foot for tabletops, countertops, and bar tops: about $4.68 to $9.35 per sq ft at 1/8 in, depending on the price per gallon.
Estimate epoxy for tabletops and flood coats with surface coverage, finish thickness, runoff, waste, and top-coat resin guidance.
Reviewed · Calculation notes and corrections