How much wood stain do I need per square metre?

Coverage varies by stain type and wood. Water-based stains cover about 10-14 m² per litre, oil-based about 8-12 m²/L, and gel stains about 6-10 m²/L. Softwoods and porous surfaces absorb more stain, reducing coverage.

How many coats of stain should I apply?

Two coats is standard for most projects. The first coat penetrates the wood, and the second coat evens the colour and adds depth. For very porous softwood, a third coat may be needed. For hardwood, one coat may be sufficient.

MDF absorbs stain very unevenly because of its density and cut edges. Seal MDF with a shellac-based sealant first, then apply gel stain for the most even result. Water-based stains can cause MDF to swell.

How long between coats of wood stain?

Water-based stains are ready for recoating in 2 hours. Oil-based stains need 6-8 hours. Gel stains need about 6 hours. In cold or humid conditions, allow extra drying time. The surface should feel dry to the touch before recoating.

WoodCalcs

Stain Coverage Calculator — Wood Stain Quantity

Calculate how much wood stain you need based on surface area, wood type, porosity, and number of coats.

Surface Area

Total surface area to cover

Wood Type

Select the wood type for your calculation

Stain Type

Oil or water-based stains have different coverage

Number of Coats

Wood Porosity

Select the wood porosity for your calculation

How We Calculate This

This calculator estimates wood stain quantity based on surface area, adjusted for wood type, porosity, and stain type. The first coat absorbs more than subsequent coats.

Coverage factors

Stain type: Water-based ~12 m²/L, oil-based ~10, gel ~8
Wood type: Softwood absorbs more (-20%), hardwood less (+10%)
Porosity: High porosity absorbs more (-30%), low less (+20%)
Second coat: Uses approximately 20% less than the first

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Always verify measurements and material quantities before cutting or purchasing.