About the Driveway Sealer Calculator

Sealer consumption follows coverage math: gallons = area × coats ÷ coverage-per-gallon. At 100 sq ft per gallon per coat, a 40 × 20 ft driveway (800 sq ft) needs 16 gallons for two coats — 3.2 five-gallon pails, rounded up to 4.

Buying Advice

Sealer arrives in 5-gallon pails, so always round up to whole pails — running short mid-coat leaves a visible seam. Buy a touch more for driveways with cracks or heavy texture, which absorb more, and apply when temperatures stay above 55°F for 48 hours.