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Epoxy Garage Floor Coating Calculator

Free epoxy garage floor coating calculator. Enter floor area, number of coats, and coverage per gallon to get the exact number of epoxy kits, optional primer and decorative flake costs, and a total price per square foot.

Wanneer gebruiken

Use this calculator before ordering epoxy for a garage, workshop, or basement floor — it turns your floor's square footage and coat count directly into a shopping list of kits, primer gallons, and optional decorative flake, so you buy exactly what the job needs instead of guessing.

Vergelijking

Compared to a generic paint-coverage calculator, this tool accounts for epoxy's two-part kit packaging (you can't buy half a kit) and separates primer and decorative flake as optional line items rather than lumping everything into one coverage rate.

Enter your values below. Calculations run locally as you type.

Zo werkt het

Total coverage needed is floor area multiplied by the number of coats, since each coat consumes epoxy across the full floor again.

Kits are rounded up to the next whole unit — the total coverage needed is divided by each kit's rated coverage and rounded up, since kits can't be split.

Primer, if selected, is costed separately by gallons needed (floor area ÷ primer coverage, rounded up) times the primer's per-gallon price, then added to the epoxy and flake costs for a full project total.

Veelgestelde vragen

How many coats does a garage floor typically need?

Most DIY epoxy kits are designed for two coats: a base coat and a topcoat. Heavily used garages or floors with staining can benefit from a third coat, but each additional coat roughly multiplies your kit count and cost.

Do I need to prime the concrete first?

Primer is recommended on bare, porous, or previously coated concrete — it helps the epoxy bond and seals dust. Sealed, newer concrete in good condition can sometimes skip it, but priming is cheap insurance against peeling.

What does a decorative flake or chip broadcast add to the cost?

Flake broadcasts are priced per square foot of the whole floor, typically anywhere from a few cents to over a dollar per sq ft depending on density and color blend. Use the flake cost field to see the exact addition to your total.

Why does the calculator round kits up to a whole number?

Epoxy kits mix resin and hardener in fixed ratios and can't be split, so the calculator rounds the coverage needed up to the next whole kit to make sure you have enough for the full job.

Voorbeeld

Invoer

400 sq ft garage, 2 coats, 175 sq ft/gal coverage, $120/kit covering 250 sq ft, primer on at 200 sq ft/gal for $35/gal, no flake.

Uitvoer

4 kits needed ($480), primer $70 — total $550 ($1.38/sq ft).

Two coats over 400 sq ft need 800 sq ft of coverage; at 250 sq ft/kit that rounds up to 4 kits ($480). Primer needs ceil(400/200) = 2 gallons at $35 = $70, for $550 total.

Veelgemaakte fouten

  • Buying by square footage alone instead of by whole kits — epoxy kits mix fixed resin/hardener ratios and can't be split, so always round up to the next full kit.
  • Skipping primer on porous, previously-sealed, or stained concrete, which risks peeling or bubbling; when in doubt, test a small patch or budget for primer.
  • Forgetting that decorative flake is priced per square foot of the whole floor, not per bag, so a full broadcast on a large garage adds up fast.

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