How Much Paint Does a Fence Need?
Fence paint quantities depend heavily on the fence style. A solid privacy fence has nearly three times the surface area of an open rail fence of the same length. Both sides of a fence need to be painted, which doubles the paint required versus a single-side calculation.
A 100 linear foot, 6ft tall privacy fence has approximately 1,200 square feet of surface area (600 per side). At 400 sq ft per gallon, that is 3 gallons per coat — buy 6 gallons for two coats.
Weathered, rough, or bare wood absorbs 30 to 50% more paint than smooth or previously painted surfaces. Always add extra when painting an old or weathered fence for the first time.
Fence Paint — Reference Table
| Fence Type & Length | 1 Coat | 2 Coats | Litres (2 coats) |
|---|---|---|---|
| Privacy fence, 50 ft | ~1.5 gal | ~3 gal | ~11.4 litres |
| Privacy fence, 100 ft | ~3 gal | ~6 gal | ~22.7 litres |
| Picket fence, 100 ft | ~1.5 gal | ~3 gal | ~11.4 litres |
| Rail fence, 100 ft | ~0.75 gal | ~1.5 gal | ~5.7 litres |
| Privacy fence, 200 ft | ~6 gal | ~12 gal | ~45.4 litres |
Paint vs Stain for a Fence
Stain penetrates into the wood fibres and does not sit on the surface, meaning it cannot peel or blister. It lasts 3 to 5 years and is easier to reapply. Paint sits on the surface and provides more colour options and better opacity, but it will eventually peel and requires more prep work when reapplying.
For a new untreated fence, stain or preservative is often the better long-term choice. For an existing painted fence, repainting is usually more practical than stripping back to bare wood for staining.
Tips for Painting a Fence
Power wash the fence first and allow it to dry fully (at least 48 hours) before painting. Painting over damp wood leads to poor adhesion and early peeling.
Use an airless sprayer for large fences — it is dramatically faster than brush or roller and gives better penetration into gaps and edges.
Paint both sides — painting only one side lets moisture penetrate from the unpainted side and causes the paint to fail faster.
Apply in dry, mild weather — avoid painting in direct sunlight (paint dries too fast and brushes out poorly) or when rain is forecast within 24 hours.
Protect plants and paving below and beside the fence with drop cloths, especially when spraying.
Related Paint Calculators
- Fence Paint Calculator →
- Stain Calculator →
- How Much Paint for a Deck? →
- Exterior Paint Calculator →
- Deck Stain Calculator →
- Spray Paint Calculator →
- Free Paint Calculator →
Frequently Asked Questions
How many gallons of paint does a fence need?
A 100 linear foot privacy fence needs 6 gallons for two coats on both sides. A picket fence of the same length needs about 3 gallons. A simple rail fence needs about 1.5 gallons.
Should I paint or stain a fence?
Stain is lower maintenance and longer lasting on new wood. Paint provides more colour options and better coverage but will eventually peel and requires more prep work on reapplication.
Do I need to prime a fence before painting?
Priming is recommended for bare or weathered wood. An exterior wood primer improves paint adhesion and reduces the total amount of topcoat needed.
How long does fence paint last?
Quality exterior fence paint lasts 5 to 7 years with good surface prep. Stain lasts 3 to 5 years. Both need reapplication when the surface begins to look weathered.
Can I use a roller on a fence?
A thick nap roller (3/4 inch) works well on flat privacy fence boards. A brush or airless sprayer is better for picket fences with many edges and gaps.
How much paint for a wood fence vs a metal fence?
Metal fences need rust-inhibiting primer and use less paint (around 1 gallon per 200 sq ft) as the surface is smooth and non-absorbent. Wood fences absorb significantly more paint.