Calculator Use
This deck staining cost calculator is designed to provide homeowners and contractors with a reliable estimate for refinishing wood decks. By entering your deck's dimensions and local cost variables, you can budget for both DIY projects and professional services. This tool accounts for the square footage, the number of stain coats required, and the current market price of high-quality wood stains.
Whether you are applying a transparent sealer to a new cedar deck or performing a full restoration on a weathered pressure-treated surface, the calculator adjusts labor and material requirements based on your project scope.
- Deck Length & Width
- The primary dimensions of the walking surface. For multi-level decks, calculate each level separately and sum the costs.
- Stain Price ($/gal)
- The cost per gallon of your chosen product. Standard stains range from $30-$50, while premium architectural stains can exceed $80 per gallon.
- Labor Rate ($/sq ft)
- If hiring a professional, this is the rate per square foot. National averages typically range from $2.00 to $5.00 depending on prep work.
How It Works
The deck staining cost calculator uses a multi-step formula to determine the final estimate. It first calculates the total surface area, then determines the volume of stain required based on standard coverage rates (typically 250-300 square feet per gallon for a single coat).
Total Cost = (Area × Labor Rate × Condition Multiplier) + ((Area × Coats / Coverage) × Price per Gallon) + Prep Supplies
- Area: Calculated as Length multiplied by Width.
- Condition Multiplier: Full restorations (sanding/stripping) increase labor by approximately 50%, while new wood requires slightly less prep.
- Coverage Rate: The calculator assumes 250 sq. ft. per gallon, which is conservative for older, "thirsty" wood.
- Labor: Professional labor includes power washing, light sanding, and application.
Calculation Example
Example: A homeowner has a 16′ x 20′ deck that is in good condition but needs a fresh look with two coats of premium stain.
Step-by-step solution:
- Calculate Area: 16 ft × 20 ft = 320 sq ft.
- Stain Needed: (320 sq ft × 2 coats) / 250 sq ft coverage = 2.56 gallons (Round up to 3 gallons).
- Material Cost: 3 gallons × $50.00 = $150.00 + $50 prep supplies = $200.00.
- Labor Cost: 320 sq ft × $3.00/sq ft = $960.00.
- Total Result: $1,160.00
Common Questions
How much does it cost to stain a deck myself?
DIY costs are significantly lower because you eliminate the labor rate. You should expect to pay between $150 and $400 for a standard 300 sq ft deck, which covers the stain, cleaner, brushes, and rollers. The primary "cost" for DIY is the 10-20 hours of labor required for proper cleaning and application.
How often should I restain my deck?
Most professional contractors recommend re-staining every 2 to 3 years. Transparent stains and sealers may need annual maintenance, while solid stains can last up to 5 years. Use the "water drop test": if water soaks into the wood, it is time to restain; if it beads up, the protection is still active.
Does the cost include railings and stairs?
Railings and stairs add significant labor. While this calculator focuses on the main floor area, professionals often charge a "linear foot" rate for railings or a flat "per step" fee. If your deck has extensive railings, consider adding 20-30% to the labor total for a more accurate estimate.