Easy Epoxy Calc

How much epoxy for a 50 m² floor?

Short answer

You need about 28.8 liters of epoxy floor coating for two 250 µm (0.25 mm) coats on a 50 square metre floor — 14.4 liters per coat including 15% for absorption, or 3 kits of 10 liters.

How to work it out

  1. 10 m × 5 m = 50 m²
  2. 1,000 ÷ 250 µm = 4 m²/L
  3. 50 m² ÷ 4 m²/L × 1.15 = 14.4 L per coat × 2 = 28.8 L
  4. 28.8 L ÷ 10 L per kit = 2.88 → 3 kits
  5. Area per batch = 10 L ÷ 1.15 × 4 m²/L = 34.8 m² of base coat

Fifty square metres is a large double garage, a small workshop or a 10 × 5 m unit. In metric the arithmetic is simpler than in mils: a liter spread 1 mm thick covers exactly 1 m², so at 250 µm (0.25 mm) a liter covers 4 m², and one coat on this floor is 12.5 liters before losses.

Adjust for your project

m
Wall to wall, in metres.
m
Wall to wall, in metres.
Wet film (WFT) is what you roll on; dry film (DFT) is what’s left once the coating has cured. Most floor data sheets give DFT — check which yours says.
µm
From the data sheet. Thin water-based coats are around 100 µm, 100%-solids coats often 200–500.
Coats of this product. A clear topcoat of a different product goes in Topcoat below.
%
On the data sheet as “volume solids” or “solids by volume”. 100%-solids epoxy is 100; water-based coatings are much lower.
µm
A clear coat of a different product over the base — e.g. to lock in flakes. Same basis (wet or dry) as above. Leave blank for none.
m²/L
Leave blank for no primer. From the primer’s data sheet — ground concrete: typically about 5–7.5 m²/L.
L
Mixed size of one kit or pail — both parts together.
More options: cove · waste · batch …
m
Cove base = the coating carried up the wall as a curved skirting. Enter the length of wall it runs along; leave blank for none.
%
Porous concrete, roller and tray losses
L
Mixed coating per batch. Leave blank to mix one whole kit at a time — the usual way on floors.
$
Optional — your kit price, for a cost estimate (the same price is used for every product).
Floor coating to buy (all coats)28.8 L7.59 gal
Kits to buy
3 kits
Per base coat
14.4 L (3.8 gal)
Floor area
50 m²
Theoretical coverage per base coat
4 m²/L
Wet film per base coat
250 µm
Approx. dry film per base coat
250 µm
Batches per base coat
2 batches
Area one batch covers
1 × 10 L kit ≈ 34.8 m² at 250 µm — chalk-line the floor into sections this size
Left over in part-used kits
1.25 L (0.33 gal)
  • What to buy: 3 × 10 L kits of floor coating. Each kit has both parts (resin + hardener) — you don’t buy them separately. Looking at a different kit size? Change Size of the kit you’re buying above.
  • Tight fit: only 1.25 L spare. Thirsty or freshly ground concrete can use that up in the first coat — consider one more kit.

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Floor epoxy coating (by the gallon)Plan on 28.8 L — 3 × 10 L kits. Check that the data sheet’s coverage at 250 µm wet matches — that’s the number the gallons hang on.
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Kits and leftover for 50 m² by pail size (two 250 µm coats)

Kits and leftover for 50 m² by pail size (two 250 µm coats)
Kit sizeKits to buyLeft over in part-used kits
5 L kits6 kits1.25 L
10 L kits3 kits1.25 L
15 L kits2 kits1.25 L
20 L kits2 kits11.3 L

What to know about coating a 50 m² floor

Three 10-liter kits hold 30 liters against about 28.8 needed, leaving 1.25 liters — a thin margin, but enough for touch-ups at the door. Switching to 20-liter pails means two pails and more than 11 liters left over, which only makes sense if you plan a third coat or a second floor.

Many European data sheets quote consumption in kg/m² rather than a film thickness. To use this calculator, divide the kg/m² figure by the product’s density in kg/L (also on the data sheet) to get L/m², then switch Data sheet gives to coverage rate and enter 1 ÷ that number. Don’t mix up wet and dry microns on solvent-borne or water-based products: the data sheet may give both, and if it gives only the dry film, set The data sheet’s film thickness is to Dry film (DFT) and enter the volume solids — at 50% solids, 125 µm dry is 250 µm wet and takes twice the liters the dry figure suggests.

Each 10-liter kit covers about 35 m² at this film with the allowance, so the first coat takes one full kit plus about half of the second. Plan the split before mixing — a line of tape across the floor at roughly 7 m from the far wall marks where the first kit should run out.

For a single garage sized in metric, see How much epoxy for a 3 × 6 m single garage. For the US-sized equivalent by the gallon, see How many gallons of floor epoxy for 400 sq ft at 10 mils.

Different size? Use the full Epoxy Floor Coating Calculator.

What you’ll need

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Frequently asked questions

How many liters of epoxy for one coat on a 50 m² floor?

About 14.4 liters at 250 µm wet, including 15% for absorption — 2 kits of 10 liters.

How much epoxy for a 50 m² floor at 400 µm per coat?

About 46 liters for two coats, because coverage drops to 2.5 m²/L at 400 µm.

How many 20-liter kits for a 50 m² epoxy floor?

2 kits for two 250 µm coats, leaving about 11.3 liters over.

Other common sizes

Sources