Epoxy & Garage Floor Coating Calculator
Enter the floor size and the coating system to get square footage, gallons at your coverage rate, and a starting installed cost for solid-color epoxy, a flake system or polyaspartic.
Epoxy & Garage Floor Coating Calculator — ConcreteNear.com
| Coating gallons (all coats, with waste) | 7.7 · 2 coats at 125 ft²/gal |
| Coats | 2 |
Cost estimate U.S. average prices
| Epoxy floor coating, installed 440 ft² × $8.00 | $3,520 |
| Decorative flake broadcast 440 ft² × $3.00 | $1,320 |
| Estimated total | $4,840 |
- Grind or shot-blast the slab and fill cracks before coating — prep is most of the job.
- Moisture-vapor tests matter on slabs on grade; some systems need a moisture-tolerant primer.
- Stay off a new epoxy floor for the cure time on the data sheet (often 24–72 hours for light traffic).
| Inputs | |
| Length | 22 ft |
| Width | 20 ft |
| System | Epoxy with flake broadcast and topcoat |
| Coverage per coat | 125 ft² |
| Extra for waste & texture | 10% |
Planning estimate only — confirm with your supplier or contractor.
Prices used — edit any price to match your local quote
| Item | Unit price | Basis & source |
|---|---|---|
| Epoxy floor coating, installed per ft² | starting estimate Starting estimate for a basic solid-color epoxy floor including typical grind prep. Moisture issues, repairs and premium systems cost more. | |
| Decorative flake broadcast, installed (add-on) per ft² | starting estimate Starting add-on for a full-broadcast flake system and clear topcoat, on top of the epoxy coating price. |
How to use this calculator
- Measure the usable floor, not the exterior of the building.
- Pick a solid epoxy, flake or polyaspartic system.
- Set coverage from the product data sheet if you have it.
- Read gallons and the starting installed cost, then get a local quote.
Formulas
Area (ft²) = length × widthGallons = coats × area ÷ coverage (ft²/gal) × (1 + waste %)
Questions
How many gallons for a two-car garage?
A 22 × 20 ft garage is 440 ft². Two coats at 125 ft²/gal with 10% extra is about 7.7 gallons of coating, not counting primer or flake.
Do I need flake or polyaspartic?
Flake hides imperfections and adds texture. Polyaspartic often cures faster and resists UV yellowing, which matters on garage doors and sun-exposed floors. Cost is usually higher.
Can I coat over old paint or epoxy?
Only if the existing coating is sound and prepped to the manufacturer's standard. Failing paint has to come off.
Sources & assumptions
Prices checked 2026-11-10. State pricing multiplies national figures by the U.S. Bureau of Economic Analysis regional price parities (goods for materials, services for labor and services). RPPs compare general consumer price levels (U.S. = 100). They are not construction-specific; we use RPP Goods for materials and RPP Services: Other (excludes rents) for labor and services.
Starting estimates No public price series was found for: Epoxy floor coating, installed; Decorative flake broadcast, installed (add-on); Polyaspartic floor system, installed. These defaults are editable placeholders — replace them with a local quote.
Results are planning estimates, not quotes or engineering advice. Codes, specifications and your supplier's numbers govern.
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