Deck Stain Calculator

Your details

Longest side of the main deck surface.
ft
Shorter side of the main deck surface.
ft
Semi-transparent lets wood grain show. Semi-solid hides most grain. Solid covers grain completely.
Porous or rough wood absorbs more stain and reduces coverage per gallon.
Most stains recommend 2 coats. New, smooth wood sometimes needs only 1.
Accounts for spills, drips, missed spots, and rough edges.
Leave at 0 to skip the cost estimate. Enter the price per gallon of your stain.
USD
Stain to buySmall project
2.64gal

Total gallons to purchase, including waste allowance if selected

Total area240
Deck floor area240
Railing area0
Stair area0
Stain needed (net)2.4gal
Coverage rate used200
Gallons per coat1.2gal
Per coat1.2
All coats2.4
With waste2.64

You need about 2.64 gallons of semi transparent stain (2 coats).

  • Buy 3 gallons - rounding up from 2.64 gal ensures you have enough.
  • The 10% waste allowance adds 0.24 gal to cover spills, drips, and rough-edged boards.

Next stepClean and lightly sand the deck surface before applying stain. A wood brightener after cleaning can help the stain absorb evenly.

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