Deck Stain Calculator

Stain never covers as much as the label claims on real deck boards. Enter your deck size, wood condition, and number of coats to get the gallons to buy — plus the cost.

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🌳 Condition factor

Bare, rough, or thirsty wood drinks more stain — the calculator adds a realistic factor per condition.

💚 Multi-coat

Most solid stains need two coats. Buy for all coats in one go, no mid-project store runs.

💵 Cost estimate

Estimate the stain budget before the project starts so there are no surprises at checkout.

🔒 Private

All calculations run locally in your browser.

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