How much epoxy for a 3 × 6 m single garage?
You need 1 kit of garage floor epoxy rated at 23 square metres per coat for a 3 × 6 m single garage (18 square metres), since one coat with a 10% margin needs 19.8 square metres.
How to work it out
- 6 m × 3 m = 18 m² × 1 coat + 10% = 19.8 m²
- 19.8 m² ÷ 23 m² per kit = 0.86 → 1 kit
- Section per kit: 23 m² ÷ 1.1 = 20.9 m²
Single garages around 3 × 6 m are common in the UK and Europe, though older ones are often narrower — sometimes under 2.5 m wide. At 18 m² this floor sits inside a kit rated for about 23 m² (roughly 250 sq ft), with a few square metres to spare.
Adjust for your project
More options: waste · $/kit
- Floor area
- 18 m²
- Coverage needed (all coats + waste)
- 19.8 m²
- Spare coverage in the last kit
- 3.2 m²
- Area one kit covers per coat
- 1 kit ≈ 20.9 m² per coat — chalk-line the floor into sections this size
- Kit coverage assumes clean, properly prepared concrete. Old, porous or etched floors can drink noticeably more of the first coat.
Kits for a 3 m wide garage by length (one coat, 23 m² kits)
| Garage length | Floor area | Coverage needed (all coats + waste) | Kits to buy | Spare coverage in the last kit |
|---|---|---|---|---|
| 3 × 5 m | 15 m² | 16.5 m² | 1 kit | 6.5 m² |
| 3 × 5.5 m | 16.5 m² | 18.2 m² | 1 kit | 4.85 m² |
| 3 × 6 m | 18 m² | 19.8 m² | 1 kit | 3.2 m² |
| 3 × 6.5 m | 19.5 m² | 21.5 m² | 1 kit | 1.55 m² |
| 3 × 7 m | 21 m² | 23.1 m² | 2 kits | 22.9 m² |
What to know about a 3 × 6 m single garage
One kit covers it with about 3.2 m² in hand, and that margin is thinner than it looks. A 3 × 7 m garage needs 23.1 m² with the allowance and just tips over one 23 m² kit, so measure the full length to the back wall, including any recess for the door frame.
Kits sold in the UK and Europe are often labelled in m² per pack, and some are sold in smaller sizes aimed at single garages. Check whether the rated coverage is per coat or for a two-coat system — the same box can read very differently depending on which.
Older garages may have been built without a damp-proof membrane under the slab, and rising moisture is a common cause of coatings that bubble and peel. Before coating, try the plastic-sheet test that Garage Flooring LLC describes: tape down a 24 in (about 60 cm) square for 24 hours and look for condensation or darker concrete underneath.
For a US-sized comparison, see How much epoxy for a 1-car garage floor or How much epoxy for a 3-car garage floor. If you’re buying a coating in liters rather than a kit, see How much epoxy for a 50 m² floor.
Different size? Use the full Garage Floor Epoxy Calculator.
What you’ll need
- Garage floor epoxy kitPremium price
Boxed kits usually include the base coat and sometimes etch and flakes. Check coverage per coat and what’s actually in the box.
See options on Amazon (opens in a new tab) - Concrete cleaner & degreaserBudget price
Oil and tire marks stop epoxy from bonding. Degrease before etching or grinding, and rinse thoroughly.
See options on Amazon (opens in a new tab) - Epoxy roller kit (3/8 in nap)Budget price
Shed-resistant roller covers, frame and tray. Have spare covers — a roller that starts to gel is done.
See options on Amazon (opens in a new tab)
As an Amazon Associate we earn from qualifying purchases. Links to products are affiliate links — they cost you nothing extra and help keep these calculators free.
Frequently asked questions
How many epoxy kits for two coats on a 3 × 6 m garage?
2 kits rated at 23 square metres: two coats with a 10% margin need 39.6 square metres.
How many epoxy kits for a 3 × 7 m garage?
2 kits rated at 23 square metres for one coat — a floor of 21 square metres needs 23.1 square metres with the margin, just over one kit.
How many kilograms of flakes for a 3 × 6 m garage?
About 14.5 kilograms for a full broadcast at a mid-range 0.73 kg per square metre, including the 10% margin — 1 box of 18 kg.
Other common sizes
Sources
- Garage Flooring LLC — Garage Floor Epoxy Coating Instructions (opens in a new tab) — Plastic-sheet moisture test, grinding or etching, light traffic after about 72 hours and about a week before parking.
- Spartan Epoxies — Purchase epoxy by layer (opens in a new tab) — Floor-coating coverage per gallon at a given mil thickness.
- Concrete Floor Supply — Epoxy flake calculator (opens in a new tab) — Full coverage: about 0.10 lb/sq ft for 1/4 in flakes, about 0.20 lb/sq ft for 1/8 in flakes.
- WALT Tools — Flake flooring (opens in a new tab) — Vinyl chips planned at about 8 sq ft per lb for a full broadcast; real-world use about 5–10 sq ft per lb depending on chip size and throwing.
- Legacy Industrial — ColorFlake decorative chips (opens in a new tab) — Chips sold in 10, 20, 30 and 40 lb quantities; custom blends in 40 lb increments.
- US EPA — Volatile Organic Compounds’ Impact on Indoor Air Quality (opens in a new tab) — Increase ventilation when using products that emit VOCs.