Fence Stain Calculator
Calculate how much fence stain or paint you need based on fence size, style, and number of coats.
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How to use this calculator
Adjust gross area by fence style (solid=100%, picket=50%, split-rail=30%), then divide by coverage per litre and multiply by coats.
- 1
Measure your fence length and height in metres.
- 2
Select whether you are painting one or both sides.
- 3
Choose your fence style to account for open areas.
- 4
Enter the stain or paint coverage per litre from the product label.
- 5
Select the number of coats you plan to apply.
Frequently asked questions
How many litres of stain does a 20-metre solid fence need?
A 20 × 1.8 m solid fence (2 sides) has 72 m² of paintable area. At 10 m²/L with 2 coats, you need about 14.4 litres — four 4-litre cans with a little to spare.
Stain vs paint — which is better for timber fences?
Penetrating stains soak into timber grain, providing protection from within and showing the wood's natural texture. Paints form a surface film that can peel and blister over time. Stains are generally preferred for timber fences as they require less maintenance.
How often should I re-stain a fence?
Most exterior timber stains last 2–4 years depending on sun exposure and product quality. Fences facing north or west (in the Southern Hemisphere) or south or west (in the Northern Hemisphere) receive the most UV and may need treatment every 2 years.
Fence Stain Calculator — Litres, Cans & Coverage
Fence Style and Coverage Adjustment
A solid paling fence has 100% of its face area to coat. A picket fence with 50% open area needs only half as much stain. Split-rail fences with 30% timber coverage need even less. Always match the style factor to your fence type for an accurate material estimate.
Choosing the Right Stain Coverage Rate
Coverage rates on product labels (commonly 8–16 m²/L) assume one coat on smooth timber. Rough-sawn, weathered, or highly absorbent timber may halve this rate. When in doubt, use the lower end of the coverage range for your first calculation.
Preparation is Key
Clean and dry timber stains better and longer. Remove dirt, mildew, and old flaky coating with a pressure washer or scrubbing brush. Allow the timber to dry for at least 48 hours before applying stain. Apply a timber primer or pre-treatment for bare or heavily weathered wood.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →