Polyurethane Calculator

Calculate polyurethane finish coverage for wood surfaces with multiple coats.

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How It Works

Polyurethane provides a durable, protective clear finish. Oil-based poly covers about 450-550 sq ft/gal and takes 4-6 hours between coats. Water-based poly covers 500-600 sq ft/gal and dries in 2-3 hours. Apply 3 coats minimum for tabletops and high-wear surfaces. Sand lightly with 320-grit between coats and wipe with a tack cloth before recoating.