Stain Fence Calculator
Most fence stains cover 150 to 250 square feet per gallon per coat on rough cedar or pressure-treated wood, depending on brand and texture. This stain fence calculator (also known as the fence stain calculator or wood fence stain calculator) takes your fence length, height, and sides-to-stain inputs and returns exact gallons needed, rounded to whole bottles for ordering. It covers Behr fence stain calculator coverage rates plus Thompson's, Cabot, and Ready Seal.
Fence Stain Calculator: How to Estimate Gallons
The fence stain calculator uses three numbers:
- Total surface area: length (ft) x height (ft) x sides (1 or 2)
- Coverage rate: 150-300 sq ft per gallon per coat depending on stain and surface
- Number of coats: 2 is standard for a weathered fence; 1 is fine for recently-stained maintenance
Formula: gallons = (surface area x coats) / coverage rate, then round up.
Behr Fence Stain Calculator (Coverage by Product)
A Behr fence stain calculator uses manufacturer-published coverage rates:
| Behr Product | Smooth Wood | Rough Wood |
|---|---|---|
| Behr Premium Transparent | 250 sq ft/gal | 175 sq ft/gal |
| Behr Premium Semi-Transparent | 225 sq ft/gal | 150 sq ft/gal |
| Behr Premium Solid | 300 sq ft/gal | 200 sq ft/gal |
For a 150 ft fence at 6 ft tall, both sides stained (1,800 sq ft surface area), using Behr Premium Transparent on rough wood with 2 coats:
- Coverage: 175 sq ft/gal
- Gallons needed: (1,800 x 2) / 175 = 20.6 gallons
- Order: 21 gallons (or 4 x 5-gallon buckets + 1 gallon)
Buying 5-gallon buckets saves 15-20% over individual gallons at Home Depot and Lowe's.
Wood Fence Stain Calculator: Rough vs Smooth
A wood fence stain calculator has to ask about surface texture. Most privacy fences are built from rough cedar or pressure-treated pine, which soaks up 30-60% more stain per coat than smooth pre-planed lumber. Always check your fence surface before ordering:
- Smooth (planed) cedar: use manufacturer's smooth rate
- Rough cedar or PT pine: use rough rate (60-75% of smooth rate)
- Re-staining previously stained fence: use smooth rate regardless of wood type
Fence Stain Calculator by Brand and Product Line
| Brand / Product | Price per gallon | Rough coverage | Life |
|---|---|---|---|
| Thompson's WaterSeal Clear | $25 | 150 sq ft | 2-3 years |
| Behr Premium Transparent | $45 | 175 sq ft | 4-6 years |
| Behr Premium Solid | $50 | 200 sq ft | 6-8 years |
| Cabot Semi-Transparent | $55 | 150 sq ft | 3-5 years |
| Ready Seal (pro favorite) | $60 | 150 sq ft | 4-5 years |
Ready Seal is popular with pros because it is self-priming, no-lap, and goes on without stirring. Behr products are the most common DIY choice at Home Depot.
Two-Coat vs One-Coat
A fence stain calculator should default to 2 coats for any project with a new fence or a fence that has been un-stained for more than 2 years. One coat works for maintenance touch-ups if less than 18 months have passed since the last stain. Solid stains often go on in a single thick coat; transparent stains need two.
How Much Stain for 100 ft Fence?
A 100 ft x 6 ft fence stained on both sides = 1,200 sq ft. With Behr Transparent on rough wood and 2 coats: (1,200 x 2) / 175 = 13.7 gallons. Order 14 gallons, or 2 x 5-gallon buckets + 4 individual gallons.
How Much Stain for 200 ft Fence?
A 200 ft x 6 ft fence stained on both sides = 2,400 sq ft. With Behr Transparent on rough wood and 2 coats: (2,400 x 2) / 175 = 27.4 gallons. Order 28 gallons, or 5 x 5-gallon buckets + 3 individual gallons.
Application Methods and Labor Cost
- Brush (DIY standard): slowest, best penetration. 150-250 sq ft per hour per painter.
- Roller + brush cut-in: faster, less stain penetration. 250-400 sq ft/hr.
- Airless sprayer with back-roller: fastest (600-1,000 sq ft/hr) but needs masking and experience.
Pro labor runs $1.50 per sq ft for sprayed-and-back-rolled or $2.00 per sq ft for fully brushed. A 1,800 sq ft fence costs $2,700-3,600 in pro labor or $200-1,000 in DIY material + supplies.
Tips to Stretch Your Stain
- Power wash the fence the day before and let dry 24-48 hours
- Avoid staining in direct hot sun (evaporates before it penetrates)
- Temperatures between 50-85 deg F for best absorption
- Stir thoroughly every 20 minutes; transparent stains settle
- Buy 10 percent more than calculated to account for spills and touch-ups