Estimate the installed price of an epoxy or polyaspartic garage floor by size, coating system, and concrete prep. Pick a 1, 2, or 3-car preset and see a low to high range you can take into a bid.
Ballpark only, not a quote. The condition of your concrete drives the prep cost, and prep is where most of the price (and the durability) lives. Local labor rates and slab repairs all move the number. Always get 3 local bids before you budget.
A coated garage floor is priced per square foot of floor area, installed, and that single number hides a lot. The same two-car garage can swing from a few hundred dollars for a weekend DIY kit to several thousand for a pro flake or polyaspartic system. The reason is not the color. It is the concrete prep underneath and the type of coating on top. This calculator multiplies your garage size and selections by published per-square-foot cost ranges to show a low, mid, and high installed estimate, so you can sanity-check a contractor bid or set a realistic budget before you call anyone.
Coatings are sold by the square foot of floor, and the price you are quoted is almost always the installed cost. That folds three things together that homeowners forget are separate: preparing the slab, the coating product itself, and the labor to put it down. A standard one-car garage is roughly 240 square feet, a two-car is around 400 to 480, and a three-car is about 600 to 660, but bays vary, so the calculator lets you punch in your own measured area. Multiply your real square footage by length times width if you can, because an estimate built on the wrong footprint will be wrong no matter how good the per-foot range is.
If you remember one thing, remember this: a garage floor coating is only as good as its bond to the concrete, and the bond is created during prep, not during the pretty flake-broadcast step everyone films for social media. A real professional install starts by mechanically grinding or shot-blasting the slab to open the surface profile so the coating can lock in, then repairing cracks, filling pits and spalls, and addressing any oil staining. That prep labor is frequently a large share of the total price, and it is exactly what most cheap kits skip in favor of a light acid etch. Floors that bubble, peel, or lift at the tire tracks within a year almost never failed because of a bad coating. They failed because the prep was rushed or skipped. When two bids are far apart, the cheaper one has usually priced less grinding and crack repair, so ask each contractor what prep method they use before you compare numbers.
Every per-square-foot range in the tool above is driven by the levers below. Understanding them tells you why two honest installers can quote very different numbers for the "same" floor:
A big-box DIY kit is by far the cheapest option on paper, and for a clean slab in a dry climate it can look great for a while. But be clear-eyed about what you are buying. Most kits are thin, water-based epoxy applied over a light acid etch rather than a real mechanical grind, and they simply do not build the same film thickness or bond as a pro system. Under hot tires, road salt, and humidity, many kits start peeling at the tire tracks within one to three years. If a short-term refresh is all you want, a kit is a reasonable budget choice. If you want a finish that survives a decade or more, the money is in professional prep and a thicker system, and no kit can match that no matter how the box is marketed.
This is the choice most homeowners wrestle with once they decide to hire it out. Epoxy is the proven, lower-cost workhorse. It bonds well, takes flake beautifully, and has been used in garages for decades. Its weaknesses are that it can yellow under UV light, it cures slowly (often keeping you out of the garage for days), and it can soften under very hot tires. Polyaspartic (a polyurea family coating, usually applied over a flake base as a fast one-day system) costs more per square foot, but it cures fast enough to drive on the next day, resists UV yellowing and hot-tire pickup better, and typically lasts longer. The decision comes down to budget versus lifespan and downtime. If you want the lowest price and can live with slower cure and possible yellowing, epoxy makes sense. If you want maximum durability, minimal downtime, and a finish that stays clear, the polyaspartic premium often pays for itself over the life of the floor. Many quality installs actually combine both: an epoxy base coat for adhesion with a polyaspartic clear topcoat for protection.
Where you live changes the job. In Florida and other hot, humid, coastal regions, slab moisture vapor is a real enemy of garage coatings. Many homes here sit on slab-on-grade foundations, and if the slab was poured without an effective vapor barrier underneath, water vapor can push up through the concrete and lift a coating off the floor months later. A reputable installer will run a simple moisture test (taping plastic to the slab or using a meter) before quoting, and will price a moisture-tolerant primer or vapor mitigation if the slab needs it. Hot Florida tires are also harder on coatings, which is one more reason polyaspartic and full flake systems are popular in the region. Building permit rules and any HOA appearance standards vary by city and county, so treat anything you read online as a starting point and verify locally before you commit. A licensed local pro who has coated floors in your climate is worth more than the lowest bid from someone who has not.
The Pro version drops your logo and your real per-square-foot pricing into this tool, captures the homeowner's name, email, and floor details, emails you the lead instantly, and lets you tune the epoxy, flake, metallic, and polyaspartic ranges to your market. Embed it on your flooring site and turn browsers into booked estimates.
Get early access, book a free call →Pick a 1, 2, or 3-car preset or type in your measured floor area, then choose a coating system, your concrete condition, whether the slab has moisture issues, and any add-ons. The tool multiplies your square footage by a published per-square-foot range for that system, then applies a prep multiplier for your concrete condition, because grinding and crack repair are most of the labor. If you flag a sweating slab it adds a per-square-foot allowance for a moisture-tolerant primer, per-square-foot add-ons like an extra topcoat or cove base get added on, and flat allowances cover crack patching or tearing out an old coating. You get a low, typical, and high installed range plus a cost per square foot.
The ranges are typical published U.S. garage floor coating guides, national 2024 to 2025 figures, not our own sales data, and they were last reviewed in 2026. A DIY kit range reflects materials only, since your own labor is free, which is why it sits far below any professional system. The result also shows a lifespan note for the system you picked and flags slab moisture, common on older or ground-level Florida slabs, where a coating can lift without the right primer.
The calculator cannot see your slab, and slab condition is the biggest and hardest to judge swing factor. Local labor rates, the real amount of grinding and repair, moisture, and access all move the final number, so the output is a range and never a single price. Get a moisture test and gather three local bids before you budget. We build lead-capturing calculators like this one for contractors, from $600.
Because prep is most of the labor and the whole reason a coating lasts. A newer, clean slab may need only a light grind, while a rough slab with cracks, pitting, or an old failed coating needs heavy grinding, patching, and removal before anything goes down. The tool applies a prep multiplier to the whole installed price for the condition you choose, which is why the same floor can swing widely. Ask each installer whether they grind or shot-blast, or just acid-etch.
Yes, if you tell it. When you mark that the slab sweats or shows efflorescence, the tool adds a per-square-foot allowance for a moisture-tolerant primer or vapor mitigation and shows a heads-up note. This is common on older or ground-level Florida slabs, where skipping it can let the coating delaminate later. It is an estimate only, so have an installer run a moisture test and confirm the right primer for your slab.