Deck Stain & Sealer Calculator

Calculate the exact amount of stain or sealer needed for your deck, including railings, spindles, and stairs. Get professional results with precise measurements.

Main Deck Dimensions

Enter your deck's shape and dimensions for accurate surface area calculation.

Deck Shape

Deck Length

Deck Width

Railings & Spindles

Accurately include railings and spindles, as they add significant surface area.

Total Railing Length

Spindle/Bannister Type

Spindles per Foot

Height of Spindles

Stairs & Extras

Number of Stair Steps

Width of Stairs

Include stair sides (stringers)?

Stain & Application Details

Wood Condition

New, Smooth Wood

Old, Porous Wood

Product Transparency

Transparent/Toner

Semi-Transparent

Solid Color Stain

Coverage per Gallon (sq ft)

Number of Coats

Price per Gallon ($)

Deck Layout

Stain Requirements

0 Gallons

Total Stain Needed

Surface Area Breakdown

Component	Area (sq ft)
Deck Surface	0.0
Railings	0.0
Total Stainable Area	0.0

Coverage per gallon:250 sq ft

Number of coats:2

Wood condition:new

Stain type:semi transparent

How to Prep a Deck for Staining

Clean the deck thoroughly with deck cleaner
Sand rough or splintered areas smooth
Check weather forecast - avoid rain for 24-48 hours
Remove all furniture and decorations
Cover nearby plants and surfaces

Choosing the Right Stain

Transparent

Shows wood grain, natural look, requires frequent reapplication

Semi-Transparent

Some color with visible grain, good durability, most popular choice

Solid Color

Opaque coverage, hides imperfections, longest lasting protection

Pro Application Tips

Work in manageable sections to avoid lap marks
Use a brush or pad applicator, not a roller
Back-brush to work stain into wood grain
Stain railings and spindles first, then deck boards
Apply thin, even coats for best penetration