How much 2K floor paint for a garage or workshop?

At 9 m²/L, two coats: 40×2÷9 ≈ 8.9 L before waste. With 10% waste → ~9.8 L — round up to four 2.5 L kits. Single-car garages are often 25–40 m²; measure the painted zone only, not the whole footprint if you leave margins.

Epoxy is harder and more chemical-resistant — great for garages and workshops. PU is more UV-stable and slightly flexible — better where thermal movement or sunlight matters. Both use similar coverage; follow the manufacturer system (primer + topcoat) if required.

Almost always two coats for durability and even colour. A single thick coat traps solvent and can peel. Thin first coat, full cure per label, then second coat.

On bare or porous concrete, yes — epoxy or PU primers are often sold in the same range and use similar liters to one coat. This calculator sizes the finish coats; add primer separately if the substrate is absorbent.