From measured space to purchasable material
Fence stain estimates should distinguish a single face from both sides and allow for rails, post edges, and other surfaces outside the flat outline. This calculator starts with fence length times height, multiplies by the number of faces being coated, and adds any separately measured detail area. Enter the coverage and coat count from the stain you plan to use. A configurable allowance accounts for application losses and rough surfaces. Open picket fences may have less broad-face area but more exposed edges; measuring the actual wood surfaces gives a better result than using the boundary rectangle alone.
Measure, select yield and round the order
- Decide whether one side or both sides will be coated.
- Measure rails, posts, and exposed edges separately where practical.
- Enter the label coverage, required coats, and your chosen package size.
Net requirement and purchase calculation
A worked example
100 ft × 6 ft × 2 faces plus 50 sq ft of details equals 1,250 sq ft. At 200 sq ft/gal, one coat and 10% allowance need 6.875 gal, or two 5-gallon cans.
Fence Stain: what changes the result?
Examine physical dimensions, pieces and purchasing constraints together. The comparisons below are calculated from this page’s default example. Each row changes only the named input; all other inputs stay at their displayed example values. These are mathematical scenarios, not measurements from a completed project.
| Changed assumption | Default input | Comparison input | Result: default → comparison |
|---|---|---|---|
| Fence length | 100 ft | 120 ft | Estimated stain volume: 6.875 → 8.195 US gal Surface area before coats: 1,250 → 1,490 sq ft |
| Fence height | 6 ft | 7.2 ft | Estimated stain volume: 6.875 → 8.195 US gal Surface area before coats: 1,250 → 1,490 sq ft |
| Additional post, rail and edge area | 50 sq ft | 60 sq ft | Estimated stain volume: 6.875 → 6.93 US gal Surface area before coats: 1,250 → 1,260 sq ft |
| Coats | 1 | 2 | Estimated stain volume: 6.875 → 13.75 US gal Full cans: 2 → 3 |
Displayed values are rounded. Whole-pack results change in steps; continuous quantities may change before a new pack is needed. To compare your actual project, enter your dimensions above, save a scenario, then change one assumption.
Coverage, allowance and purchasing limits
- A neighbor-facing surface may be inaccessible or outside your authority to work on. Include only the surfaces you will coat.
- Overspray and masking needs differ between sprayer, brush, and roller application. The allowance is a planning choice.
- Keep stain batches consistent and confirm preparation requirements for weathered or previously coated wood.
Frequently asked questions
How much stain is needed for both sides of a fence?
Multiply fence length by height and by two, then add exposed detail surfaces and divide by the product coverage for the specified coats.
Can I use the full rectangle for a spaced picket fence?
It is only an approximation. Subtract open areas or measure individual wood faces and edges for more accurate surface area.
Does a five-gallon can always cover five times the label rate?
Its nominal volume does, but texture, technique, and coat count change the real coverage. Test the actual surface.
Read the project guides
- Fence Material Takeoff: Posts, Pickets, Gates and Equal Spacing
Break a fence into runs, account for gate openings, lay out posts, count pickets, and estimate finish for the surfaces actually coated.
Calculation method: JICWH methodology. Examples are planning assumptions, not product recommendations.