Driveway Sealer Calculator: How Many Gallons Do I Need?

Driveway sealer calculator

Estimate how many gallons of driveway sealcoat you need from area, coats, and coverage (ft² per gallon).

Length (ft) Width (ft)

Coverage (ft² per gallon, per coat) Number of coats Cost per gallon ($)

Use your gallons estimate

Compare the estimate above with the coverage printed on your sealer container. Measure irregular areas separately and add them; this is a planning estimate, not a product guarantee.

Read the step-by-step sealcoating guide · Check drying conditions before sealing

Find something useful for your next project

Measure before you order. Sealcoating tools are for an existing asphalt surface, not for placing hot mix. Follow the sealer label for cure time and conditions.

Komelon MK3112 measuring wheel

Measure driveway length and width before entering your dimensions.

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MARSHALLTOWN 36-inch asphalt squeegee

Curved neoprene blade for spreading sealer on existing asphalt.

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BOSCH GLL50-20G laser level

Green cross-lines for layout and alignment. Check the manual and beam visibility before outdoor work.

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OLIGHT Oclip Pro — Orange

USB-C rechargeable clip-on light with flood, spot and red modes; magnetic mounting for hands-free tasks.

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Gemplers Pure EZ asphalt release agent

Release agent for dump beds, rollers and tools—not driveway sealer. Follow the product label and safety directions.

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Red Devil 0637 asphalt crack filler

Cold-applied acrylic cartridge filler for small asphalt/blacktop cracks. Not a hot-melt block; follow label limits.

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Pavemade HOTBOX 10 hot-pour repair kit

Melter/applicator kit with six rubberized hot-pour filler blocks. Follow equipment and material instructions and required protection.

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Komelon MK3112 measuring wheel

Measure driveway length and width before entering your dimensions.

See this on Amazon

MARSHALLTOWN 36-inch asphalt squeegee

Curved neoprene blade for spreading sealer on existing asphalt.

See this on Amazon

BOSCH GLL50-20G laser level

Green cross-lines for layout and alignment. Check the manual and beam visibility before outdoor work.

See this on Amazon

OLIGHT Oclip Pro — Orange

USB-C rechargeable clip-on light with flood, spot and red modes; magnetic mounting for hands-free tasks.

See this on Amazon

Gemplers Pure EZ asphalt release agent

Release agent for dump beds, rollers and tools—not driveway sealer. Follow the product label and safety directions.

See this on Amazon

Red Devil 0637 asphalt crack filler

Cold-applied acrylic cartridge filler for small asphalt/blacktop cracks. Not a hot-melt block; follow label limits.

See this on Amazon

Pavemade HOTBOX 10 hot-pour repair kit

Melter/applicator kit with six rubberized hot-pour filler blocks. Follow equipment and material instructions and required protection.

See this on Amazon

As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. These are paid links; check product details and suitability on Amazon.

Driveway sealer calculator tips

Use the coverage rate on your product label (often roughly 50–100 ft²/gal depending on surface and brand). Two thin coats beat one thick coat. Sealcoat does not fix alligator cracking or a failed base — see our alligator cracking guide.