Epoxy Floor Calculator

Epoxy kits, flakes, topcoat and etch for a garage or basement floor.

Project Details
Enter your measurements and requirements
$
Results
Calculated estimates for your project
Floor area440 sq ft
Epoxy3.2 gal
Kits (1 gal)4
Flakes13 lb
Topcoat1.5 gal
Etch or degreaser2 gal
Estimated cost$794

Turn these numbers into a build plan.

  • 440 sq ft area
  • 4 kits
  • $794 est. cost
Materials List
Recommended materials and quantities
Water-based epoxy kit4 kits

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Project plan · built from your numbers

Epoxy floor, 440 sq ft

4 kits of water-based epoxy kit with 13 lb of flakes.

Materials
$794
Time
1 weekend
Level
Intermediate
6 steps 4 tools 4 materials
  1. 1

    Test for moisture

    Tape down plastic for 24 hours and check for condensation.

    • Moisture tested
  2. 2

    Prepare the concrete

    Degrease, repair cracks and grind or etch the surface.

    • Floor clean
  3. 3

    Roll the first coat

    Cut in edges and roll within the pot life.

    • Coat even
01 · Your numbers
Area
440 sq ft
Kits
4
Est. cost
$794
02 · The plan

6 steps · 4 tools · 4 materials

3 more steps, the full tool list and a shopping list you can check off as you go.

03 · Finished

Your plan is 60% built. Save it.

3/5

Epoxy floor, 440 sq ft

Finished in 1 weekend · $794 DIY

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How to calculate epoxy for a garage floor

Coverage depends on the solids content, so thicker systems need more gallons.

  1. Measure the floor. Length times width.
  2. Pick the system. Coverage runs from about 160 to 300 sq ft per gallon per coat.
  3. Multiply by coats. Area x coats / coverage = gallons.
  4. Round to kits. Add waste and round up to full kits.
  5. Add extras. Flakes, topcoat and etch are separate buys.

Epoxy systems compared

SystemSolidsCoverage per gallon
Water-based epoxy kitabout 50%300 sq ft
Solvent-based epoxyabout 70%250 sq ft
100% solids epoxy100%160 sq ft

Prep matters more than the product. Read the concrete staining guide.

Frequently asked questions

How much epoxy do I need for a 2 car garage?

About 440 sq ft takes 3 to 4 water-based kits for two coats at typical coverage.

Why grind instead of etch?

Grinding opens the concrete more reliably. Etching works on some floors but sealers and oil can block it.

Do I need to test for moisture?

Yes. Tape down plastic for 24 hours and look for condensation, or use a calcium chloride test.

How long before I can park on it?

Usually 3 to 7 days. Follow the product label.

Are flakes worth it?

They hide imperfections and add texture. Use a full broadcast for the most slip resistance and hide.

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