Estimate epoxy for tabletops and flood coats with surface coverage, finish thickness, runoff, waste, and top-coat resin guidance.
Epoxy Coverage Calculator
Enter the surface area and coat thickness to see how much epoxy a tabletop, bar top, countertop, or other thin coat needs, with edges, runoff, and waste included.
Enter your measurements
Example inputs
Default dimensions, allowances and prices are example inputs. Replace them with your measurements and product label. Leave unknown product limits blank.
Coverage recommendation
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Start with the inputs to generate an order-ready estimate.
- Raw volume
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- Conservative
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- Projected cost
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- Part A / Part B
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- Layer guidance
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- Kits to buy
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- Standard
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- Product fit
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Why This Estimate Changed
What moved the number
- Enter the form values to see raw volume, buffer, and recommendation.
Next Step
Match the result to the right resin class
Use the estimate to narrow the resin class first. Then confirm product limits, cure behavior, and measurement assumptions before you make a buying decision.
Measurement diagram
How do you calculate epoxy coverage?
Gallons needed = square feet × thickness in inches × 144 ÷ 231. At the common 1/8 in flood coat, one gallon covers about 12.8 sq ft, or about 10 fl oz per square foot; at 1/16 in it covers twice as much. Enter your area and thickness below to add edges, runoff, and cost.
| Coat thickness | Coverage per gallon | Resin per sq ft |
|---|---|---|
| 1/16 in (1.6 mm) | 25.7 sq ft | 5 fl oz |
| 1/8 in (3.2 mm) | 12.8 sq ft | 10 fl oz |
| 1/4 in (6.4 mm) | 6.4 sq ft | 19.9 fl oz |
Mixed resin, top surface only, before waste. The epoxy thickness and coverage chart lists seal coats and floor coatings in mils.
Check the units before adding a reserve
One square meter at 1 mm wet thickness is exactly 1 L geometrically. Therefore 10 m² at 1 mm and one coat needs 10 L before allowances; 10% waste and zero edge allowance gives 11 L. A 3 L mixed-yield kit would require four kits. A product coverage rate is a different input: it incorporates that product's stated application conditions and should not be added as a second volume calculation.
Product data before mixing
Use the exact product documentation for mixing basis, maximum layer depth, mixed batch volume and cure or recoat conditions. A dimensional estimate and a purchase allowance do not supply those material limits.
What this calculator covers
- Best for tabletops, countertops, bar tops, and other surface-finish jobs.
- Turns area and thickness into an order-ready resin estimate with realistic buffer.
- Makes edge soak-in, runoff, and waste visible instead of hiding them inside one vague number.
- Useful for per-square-foot planning when you know the surface area but not the final order quantity.
How to measure or set the inputs
- Measure every face that will actually receive epoxy, including exposed edges if you plan to coat them.
- Use the intended finished coat thickness, not the height of the whole project or substrate.
- For a fast per-square-foot check, start with the epoxy thickness and coverage chart and then return here to add waste, edges, and cost.
- Raise the waste setting if the piece has complex perimeter detail, porous material, or heavy runoff.
Common mistakes that cost money
- Estimating only the top face and forgetting coated edges, drips, or waterfall faces.
- Confusing a thin flood coat with a deep cavity fill.
- Using a surface-coverage page for a river table, void fill, or thick cast.
Project checklist before you buy
- Confirm the mold or surface is sealed before mixing resin.
- Measure depth twice at the deepest point of the project.
- Add extra material for waste, seepage, and edge soak-in.
- Confirm the resin type matches the intended pour depth.
- Prepare cups, stir sticks, gloves, and a level work surface.
FAQ
Questions people ask before buying epoxy
Is this page better for top coats than a volume calculator?
Yes. Coverage projects are usually driven by surface area and finish thickness, so a coating-oriented calculator is the better fit.
What thickness should I enter for a flood coat?
Enter the finished coat thickness you want to see after leveling, not the full height of the substrate. A coating job is about surface build, not cavity depth.
Should I include edges in the coverage estimate?
Yes, if the edges will actually receive epoxy. On many finish jobs, edges and runoff are exactly where the estimate becomes too low if you ignore them.
Related Pages
Related calculators and guides
Estimate epoxy for a thin seal coat before a flood coat, river table, countertop, or porous wood project.
Learn how much epoxy is needed per square foot at common coat thicknesses and when to use a coverage calculator.
Understand how far a gallon of epoxy goes by coat thickness, coverage rate, surface type, and waste assumptions.
Use this countertop epoxy calculator to estimate coverage, finish thickness, waste, and resin quantity for kitchen, island, vanity, and other surface projects.
Epoxy garage floor cost: $4–$10 per sq ft installed, about $1,600–$4,000 for a 400 sq ft 2-car garage. Compare DIY kits, flake, metallic, and polyaspartic.
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.
Free epoxy volume calculator: enter length, width, and depth in inches or cm to see how much resin to pour in ounces, gallons, or liters, with waste and cost.
Estimate epoxy project cost from planned resin quantity, waste, and price input for river tables, deep pours, coatings, and other resin projects.
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.
Reviewed · Calculation notes and corrections