Fence Paint Calculator
Estimate fence paint or stain volume, full containers, treated area, purchased capacity and material cost from length, height, sides, coats and coverage.
Default project preview
8.67 gal
Full containers
2
Flat fence area
1,200 ft²
Detailed treatment area
1,380 ft²
Total coat area
2,760 ft²-coats
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Fence length
Enter this project assumption in ft. The current imperial default is 100 ft.
Fence height
Enter this project assumption in ft. The current imperial default is 6 ft.
Faces to coat
Enter this project assumption in a unitless value. The current imperial default is 2. Minimum: 1. Maximum: 2.
Posts and rail surface allowance
Enter this project assumption in %. The current imperial default is 15 %. Minimum: 0. Maximum: 50.
Paint or stain coats
Enter this project assumption in a unitless value. The current imperial default is 2. Minimum: 1.
Coverage per volume unit per coat
Enter this project assumption in ft²/gal. The current imperial default is 350 ft²/gal.
Extra allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Container size
Enter this project assumption in gal. The current imperial default is 5 gal.
Price per container
Enter this project assumption in a unitless value. The current imperial default is 155. Minimum: 0.
How to read the outputs
Full containers
5 gal each. Default preview: 2.
Flat fence area
length × height × faces. Default preview: 1,200 ft².
Detailed treatment area
posts and rails included. Default preview: 1,380 ft².
Total coat area
before extra allowance. Default preview: 2,760 ft²-coats.
Purchased volume
full containers. Default preview: 10 gal.
Material cost
paint or stain only. Default preview: $310.00.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Flat area = fence length × height × coated faces. Post-and-rail allowance, coat count and extra allowance are applied before container rounding.
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: August 19, 2026
Estimate paint volume for fence surfaces from fence dimensions, the number of coated faces, coats and product coverage.
Calculation steps
- 1Measure fence length and coated height.
- 2Account for one or both faces and subtract large unpainted openings where appropriate.
- 3Multiply by the number of coats.
- 4Divide by the selected paint's coverage and round to purchasable containers.
Worked numerical example
A 100 ft long, 6 ft high solid fence painted on both sides has about 1,200 ft² of face area. Two coats create 2,400 ft² of coverage demand; at 350 ft²/gal, about 6.86 gallons are required before container rounding.
Purchasing and rounding
Use an exterior coating compatible with the fence material and preparation system. Coverage for rough wood, masonry or spray application can differ significantly from smooth-surface label coverage.
Interpret the result
The result is coating volume for the modeled fence faces and coats. Open picket fences, posts, rails and lattice have more edge surface than a simple solid-face area, so those systems may need a different area model or extra allowance.
Page-specific assumptions
- The entered fence area reasonably represents the surfaces receiving paint.
- Coverage matches the exact coating and substrate condition.
- Both sides are included only when both will be coated.
Common mistakes
- Counting only one side when both sides will be painted.
- Using plan length without fence height.
- Ignoring posts/rails on open fencing.
- Using interior paint coverage for exterior rough wood.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Fence Paint Calculator questions
Should both sides of a fence be coated?+
That depends on access, ownership, exposure and the desired finish. The faces input can be set to one or two.
Why add a posts-and-rails allowance?+
A flat rectangle does not include the additional surfaces around posts, rails and picket edges.
Does spraying use more coating?+
It can, because overspray and transfer loss reduce effective coverage.