Fence · updated 2026
Fence Stain Calculator
Running out of stain with one section left is a special kind of frustration — and a second can never quite matches the first. This fence stain calculator converts your fence’s linear footage, height, and number of sides into exact gallons for your chosen number of coats, using real manufacturer coverage rates, plus 2026 stain costs. The default 200 sq ft per gallon suits most fence stains on rough-sawn wood; smooth cedar stretches further, weathered gray wood drinks more.
Check the can — most fence stains cover 150–250 sq ft/gal; use 150 for rough or weathered wood
Show the math
Surface area = 150.0 × 6 × both side(s) = 1800.0 sq ft
Gallons = 1800.0 × 2 coat(s) ÷ 200.0 sq ft/gal = 18 gal
Cost = 18 gal × $35–$55/gal
What the numbers mean
The calculator converts your measurements into a practical purchase quantity using a documented coverage or spacing assumption.
Any whole-unit quantity is rounded up so the result does not leave you short during the project.
Use the cost range as a planning baseline and confirm the final quantity, availability, and delivery charge with your local supplier.
2026 material prices
| Material | 2026 average price | Note |
|---|---|---|
| Exterior wood stain, per gallon | $35.00 – $55.00 / gallon | Semi-transparent cedar tone, retail |
| Pump sprayer (optional) | $40.00 – $80.00 / sprayer | Speeds up big runs; back-brush after spraying |
Material prices: Phase 2 2026 national-average guide, Sep 2026. Local prices vary. 2026 U.S. national averages. Prices vary by region and retailer — confirm locally before buying.
Pro tips
- Stain both sides plus the tops of the pickets — moisture enters from every exposed face.
- On weathered fence wood, plan a full second coat — the thirsty surface can absorb nearly as much stain on coat two.
- Spray then back-brush: spraying is fast, brushing works the stain into the grain so it lasts.
- Never stain in direct midday sun — the surface dries before the stain penetrates and it peels early.
- Buy all your stain at once and box (mix) the cans together for uniform color.
- A 150-ft, 6-ft fence, both sides, 2 coats at 200 sq ft/gal needs 18 gallons — that is the better part of a Saturday.
Common questions
Frequently asked questions
How much stain for 150 feet of 6-ft fence?
Both sides is 1,800 sq ft; at 2 coats and 200 sq ft/gal that is 18 gallons. One side, one coat would be 4.5 gallons.
Should I stain one side or both sides?
Both sides, plus picket tops — stain is weather protection, not just color, and moisture attacks every face.
How often do I need to restain a fence?
Every 2–4 years depending on sun exposure; south-facing fences fade fastest.
Stain or paint for a wood fence?
Stain penetrates the wood and will not peel; paint gives more color options but peels and needs scraping. Stain is lower-maintenance long-term.
How many square feet does a gallon of fence stain cover?
150–250 sq ft per gallon on most woods — use the low end for rough-sawn or weathered gray wood.
How many coats of stain does a fence need?
Two thin coats. The second coat roughly doubles the gallons but adds years to the finish.
Related calculators
Planning estimates only. Prices are 2026 U.S. national averages and vary by region — confirm with your local supplier before buying.