Driveway sealer calculator: how many gallons of driveway sealer
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Shopping for pails without math wastes money. A driveway sealer calculator answers the purchase question: how many gallons of driveway sealer for this area and coat count? Coverage comes from the product label. This page is gallons arithmetic — not a coating how-to.
Prep, weather, and application steps live elsewhere: how to sealcoat an asphalt driveway. Here we stay on sealcoat gallons and the free tool.
Open driveway sealer calculator →Formula: sealcoat gallons from square feet
Gallons ≈ (Area in ft² × Number of coats) ÷ Coverage (ft² per gallon)
Area is length × width (split odd shapes into rectangles). Label coverage often lands near 80–100+ ft² per gallon, depending on formula and texture. Oxidized or open asphalt soaks more; tighter, newer surfaces often stretch farther.
Sample: 50 × 12 ft = 600 ft². Two coats at 100 ft²/gal → (600 × 2) ÷ 100 = 12 gallons. Drop coverage to 80 ft²/gal and you need 15 gallons.
Mirror those inputs in the driveway sealer calculator so shopping lists stay accurate.
When to use the calculator
- Buying concentrate vs ready-to-use — convert to finished gallons after the mix ratio.
- Stacking two labels with different published coverage rates.
- Choosing one coat versus two on a faded drive that is still structurally sound.
Skip sealcoat over active alligator cracking or a collapsed base — a film will not rebuild structure. Background: alligator cracking repairs.
Tips and caveats
- Use that product’s stated coverage; “up to” marketing rates assume ideal pavement.
- Oil spots and patch areas you will prime separately change effective coverage.
- Cool weather and heavy film builds raise gallons used (lower effective coverage).
- Planning estimates only — a little leftover sealed product beats running dry mid-coat.
Concentrate vs ready-to-use
Concentrate labels publish a mix ratio that changes how many finished gallons each jug yields. Size coverage in finished gallons first, then back-solve concentrate volume. Need 12 finished gallons at 1:1 with water → roughly 6 gallons of concentrate, plus a spare margin.
Two thin coats usually look more even than one heavy pass, but they also double the area term in the gallons formula — pick coat count before you buy. Wash first, then wait for full dryness; damp asphalt skews both usage and cure. Wash budget: pressure washing driveway cost calculator.
Related tools
FAQ
How many gallons of driveway sealer for 1,000 ft²?
Depends on the label coverage and coats. At 100 ft²/gal and two coats: (1000 × 2) ÷ 100 = 20 gallons. At 80 ft²/gal: 25 gallons. Always use the product’s coverage rate.
Should I round up?
Yes, slightly — porous asphalt, rough texture, and brush/spray waste use more product. Buy what you can return if unopened, or plan a small surplus.
Does sealcoat fix alligator cracking?
No. Sealcoat is a surface treatment. Failed base and alligator cracking need repair or replacement — see our alligator cracking guide.