How to Calculate Epoxy for a Metallic Floor System
Base coat, metallic color coat, and top coat sized from one floor measurement, plus why the metallic coat is the least predictable of the three.
Last updated October 22, 2026
A metallic epoxy floor is three layers like a flake system (base coat, metallic color coat, and clear topcoat), but the metallic coat gets its marbled, lacing look from application technique (how it’s manipulated while wet), not from the material alone. Size all three layers from one floor measurement, then always test the technique on a sample board first.
How to read the inputs
Floor Size
- One number drives all three layers, so measure it once with the Square Meters / Square Feet Calculator
Coverage Rates
- Three separate numbers from each product’s TDS. The metallic coat’s rate varies the most between manufacturers, so don’t assume a generic figure
Pack Sizes
- The kit size you order in for each layer, which determines how the quantity rounds up to a real order
Kits to Order
- Rounded up per layer. Order the rounded figure, not the raw decimal quantity needed
Worked example
A 500 ft² floor, using the calculator’s placeholder coverage rates (one major maker prints 45 ft²/gal for its standard metallic epoxy, so check yours): the base coat needs 500 ÷ 160 = 3.13 gal, rounding up to 2 kits in 3-gallon kits. The metallic color coat needs 500 ÷ 100 = 5.00 gal, also 2 kits at 3 gallons each. The clear topcoat needs 500 ÷ 250 = 2.00 gal, exactly 1 kit at 2 gallons.
Try it with your own floor
Enter your floor size and adjust each layer's coverage rate to match your specific products' TDS.
Full result gives quantities and kits to order for all three layers.
Open the live calculator →Three layers is the core of the system. If your build also carries a moisture barrier or a second base coat, the XPS calculator puts every coat on one sheet with its gallons and kits, metallic design coat included.
Common mistakes
- Skipping a sample board before the full floor, when a metallic finish depends heavily on technique and timing, not just materials
- Using a generic or flake-system coverage rate for the metallic coat instead of that specific product’s own rate
- Under-ordering topcoat for a manipulated, textured metallic surface, which can use more than a flat floor’s rate assumes
- Using a pigment or loading the resin maker does not specify, instead of the metallic additive and loading rate on that product’s data sheet
Frequently Asked Questions
Why is the metallic coat’s coverage rate so much lower than the base coat’s?
The metallic coat is a build coat, not a color coat. The pigment needs a depth of resin to move through to create the marbled or lacing effect, so it is laid thicker than a standard flat color coat and covers less floor per gallon. The rate varies a lot between manufacturers (one major maker prints 45 ft² per gallon for its standard metallic epoxy), so always use your specific product’s own rate rather than a generic assumption.
Should I test the technique before doing the full floor?
Yes. Always pour a sample board first. A metallic floor’s final look depends heavily on application technique and timing, and it is not something to learn for the first time on a client’s floor.
Does a metallic floor need more topcoat than a flat epoxy floor?
Often yes. The manipulated, slightly textured metallic surface can use more topcoat to fully level and protect than a flat floor’s coverage rate assumes.
Can I mix my own metallic pigment into a base epoxy instead of buying a pre-made metallic coat?
Yes, and many systems are built that way: the maker supplies a metallic pigment or additive that you mix into its own clear resin at the loading rate on its data sheet (Leggari and Simiron both work like this). The risk is a pigment the resin maker did not specify, or a changed loading, which can change how the pigment suspends and moves, so test the exact combination on a sample board first.