How Much Paint or Stain Do I Need for a Fence?

Quick answer: A 100-foot fence at 6 feet tall, painted one side, needs about 2 gallons for two coats. Painting both sides doubles that to roughly 4 gallons. Stain often covers less than paint, so check the can. Picket fences with gaps use 15 to 20 percent less than solid panels.

Fences eat paint faster than people expect because rough, weathered wood soaks up the first coat and you are often coating two sides. This guide gives you the gallons by fence length, the formula for any size, and the adjustments for fence style and material. Our paint coverage calculator does the same math from your measurements if you would rather not reach for a tape and a calculator at the same time.

Paint and stain needed by fence length

The table assumes a 6-foot-tall fence and two coats. Coverage is figured at 300 square feet per gallon, lower than interior walls because exterior wood is rougher and thirstier.

Fence length	Area, one side	One side, 2 coats	Both sides, 2 coats
50 ft	300 sq ft	2 gal	4 gal
100 ft	600 sq ft	4 gal	8 gal
150 ft	900 sq ft	6 gal	12 gal
200 ft	1,200 sq ft	8 gal	16 gal

These figures are for solid privacy fences. If your fence is picket or has gaps between boards, see the style adjustment below, because you are painting less actual surface than the length suggests.

The formula for any fence

Step 1: Measure total length and height

Walk the fence and add up the run in feet. Measure the height of the boards.

Step 2: Multiply for one-side area

Length times height gives the area of one face. A 100-foot fence at 6 feet tall is 600 square feet per side.

Step 3: Double it if you are coating both sides

Most privacy fences get painted on both sides. Multiply by two: 1,200 square feet total.

Step 4: Divide by coverage, multiply by coats

Divide by 300 square feet per gallon for exterior wood, then multiply by your number of coats. For 1,200 square feet at two coats: 1,200 / 300 x 2 = 8 gallons.

Paint versus stain: they do not cover the same

Paint sits on top of the wood and usually covers 250 to 400 square feet per gallon. Stain soaks in, and coverage varies wildly by type:

• Solid color stain: 200 to 300 square feet per gallon, similar to paint.
• Semi-transparent stain: 150 to 250 square feet per gallon, lower because it is thinner and the first coat disappears into the grain.
• Clear or transparent sealer: 250 to 400 square feet per gallon, but raw or weathered wood drinks far more on the first pass.

Always read the coverage figure on your specific product and weight your estimate toward the low end for old, dry, or new untreated wood.

Fence style changes the math

Fence style	Adjustment vs solid panel
Solid privacy (boards touching)	Baseline (use table figures)
Picket (gaps between boards)	Subtract 15 to 20 percent
Shadowbox or board-on-board	Add 10 to 15 percent (overlap + edges)
Split rail	Subtract 40 to 50 percent (mostly open)
Lattice top	Add 10 percent (lattice edges eat paint)

Picket and split-rail fences look like a lot of fence but have a fraction of the solid surface, so you can safely buy less. Board-on-board and lattice have hidden edges and overlaps that need coverage, so round up.

Why the first coat always uses more

Bare or weathered fence wood is porous. The first coat soaks deep into the grain and looks patchy, which is normal. The second coat goes on far smoother and covers more per gallon because the wood is already sealed. If your fence is brand new or grayed from sun, expect the first coat to use noticeably more than the second.

Spraying a fence

Many people spray fences to save time. A sprayer is fast but wastes paint to overspray and wind drift, dropping effective coverage to 150 to 250 square feet per gallon. If you spray, add 25 percent to the table figure, and consider back-brushing the first coat to push paint into the grain so it actually bonds.

Buy a cushion for touch-ups

Add 10 percent for spillage, overspray, and the rail caps and posts that the simple length-times-height math ignores. Fences also weather faster than house siding, so keeping a labeled gallon for spot repairs in a year or two is sensible.

A worked example: new versus weathered fence

Take a 120-foot, 6-foot solid privacy fence you want coated on both sides. The surface is 120 x 6 x 2 = 1,440 square feet. At 300 square feet per gallon and two coats, that is 1,440 / 300 x 2 = 9.6 gallons, so buy 10 gallons.

Now the catch: if the fence is brand new or sun-grayed, the first coat will soak in and use closer to 250 square feet per gallon, pushing the first coat alone toward 6 gallons. Plan 11 to 12 gallons for raw or weathered wood, and only 9 to 10 for a fence that was sealed before. The wood’s thirst, not the math, is what empties the cans.

Wood type and how thirsty it is

Different fence woods drink very differently, which shifts your first-coat quantity:

Wood	Absorption	Effect on first coat
Cedar (new)	High	Soaks heavily, budget extra
Pine, pressure-treated	Moderate to high	Let it dry out first, then expect a thirsty first coat
Redwood	Moderate	Standard
Previously sealed wood	Low	Closest to the table figures

Pressure-treated lumber is often still damp from the yard. Painting or staining it before it dries traps moisture and the finish peels, wasting everything you applied. Wait until it is dry, then coat.

Prep decides whether the coat holds

Before any paint or stain, the fence needs to be clean and sound. Pressure wash or scrub off dirt, mildew and old flaking finish, let it dry fully, and lightly sand any rough or peeling areas. A clean, dry surface lets the finish bond and reach its rated coverage. Skipping this means the first coat sits on grime and lifts within a season, which turns into a full recoat and double the paint.

The parts the length-times-height math forgets

Simple area math covers the flat boards, but a real fence has extras that quietly add up: post tops and caps, gate frames and hardware surrounds, decorative finials, and the thicker rails. Add about 10 percent over your calculated figure to cover these, and an extra quart if your fence has many posts or a couple of gates.

How often you will recoat

This shapes whether keeping leftover product is worth it. A painted fence holds up 5 to 7 years before it needs attention, while semi-transparent stain typically wants a refresh every 2 to 4 years because it weathers gradually rather than peeling. Stain is easier to recoat since there is no peeling to scrape, which is one reason many fence owners choose it despite needing it more often. Either way, a labeled gallon set aside for spot repairs earns its shelf space here.

Brush, roll or spray a fence

Application method changes both your quantity and your day. Brushing pushes finish deep into the grain and wastes almost nothing, but it is slow across a long fence. Rolling is faster on flat boards yet skips into the gaps and needs a brush to chase the edges. Spraying is the fastest by far but loses 25 percent or more to overspray and wind, so add a quarter to your quantity and back-brush the first coat so it actually grips. Many people spray the broad faces and brush the posts, rails and gaps, which balances speed against waste.

Should you paint or stain the fence?

The choice affects both quantity and upkeep. Paint forms a film that hides flaws and lasts longer per coat, but when it eventually fails it peels and needs scraping. Stain soaks in, shows the grain, and never peels, so recoating is just a wash and a fresh coat, though it weathers faster and wants attention sooner. For quantity, solid stain and paint use similar amounts, while semi-transparent and clear products use more on the thirsty first coat. Pick paint for a long maintenance gap and a uniform color, stain for natural looks and easy refreshes.

Does a fence need primer?

It depends on what you are applying and to what. If you are painting a fence, bare or weathered wood should be primed first with an exterior wood primer, which seals the thirsty grain so your finish coat covers as rated instead of vanishing into the wood. Primer is a separate quantity, roughly one coat at 300 square feet per gallon over the bare areas. If you are staining, you skip primer entirely, because stain is designed to soak into raw wood and a primer would block it. Previously painted fences in good shape only need spot priming where bare wood shows through. Factoring primer in matters: on a raw fence it is a real extra gallon or two that the simple paint math leaves out.

Timing and weather for a lasting fence finish

When you paint a fence matters as much as how much you apply. Aim for a dry stretch with no rain forecast for at least 24 to 48 hours, temperatures in the 50 to 85 degree range, and out of blazing direct sun that flashes the surface too fast. Spring and early fall are ideal in most climates. New pressure-treated lumber needs weeks to months to dry before it will take a finish, and a fence still damp from a recent wash will reject the coat. Painting in the wrong conditions means a finish that beads, peels or never bonds, which forces a recoat and doubles your real paint use.

Estimating stain for a deck-and-fence combo

Many yards have a fence and a deck stained at the same time. Decks drink even more than fences because the horizontal boards take foot traffic and weather harder, and railings have many small faces. If you are buying for both, calculate them separately: the fence by length times height as above, the deck by its square footage plus a generous allowance for railings, spindles and stairs. Do not pool the two into one guess, because the deck’s appetite will leave you short on the fence.

Fence painting cost context

Paint or stain for a 100-foot fence runs roughly 80 to 250 dollars depending on product grade and how many sides you coat. Labor is the bigger number if you hire out. To compare a DIY material budget against a contractor quote, drop your measurements into the painting calculator or build a full line-item figure with the free estimate tool.

Frequently asked questions

How much paint do I need for a 100-foot fence?

About 4 gallons for two coats on one side, or 8 gallons for both sides, assuming a 6-foot solid fence. Picket fences need 15 to 20 percent less.

How much stain for a fence?

Solid stain covers about the same as paint, 200 to 300 square feet per gallon. Semi-transparent stain covers less, 150 to 250 square feet per gallon, so buy more for the same fence.

Does a gallon of paint cover both sides of a fence?

No. One gallon covers about 300 square feet of exterior fence per coat, which is roughly 50 feet of one side. Both sides of a 50-foot fence at two coats needs about 4 gallons.

Should I paint or stain a wood fence?

Paint lasts longer and hides flaws but peels eventually. Stain shows the wood grain, soaks in rather than peeling, and is easier to recoat. For quantity, solid stain and paint use similar amounts, while transparent stain uses more on the first coat.

How many gallons of stain for a 200-foot fence?

For a 6-foot solid fence stained on both sides, that is about 2,400 square feet. At 250 square feet per gallon for solid stain and two coats, plan on roughly 16 to 20 gallons, leaning high if the wood is new or weathered and thirsty.

Can I paint a fence with a roller?

Yes, on flat solid boards a roller is fast, but you still need a brush to reach the gaps, edges and posts. On picket or rough fences a brush or sprayer works better. Whatever method you use, back-brush the first coat into the grain so it bonds.