CP
PAINT CALCULATOR

Driveway sealer calculator

Asphalt sealcoat at ~250 sqft/gal needs reapplication every 2–3 years; concrete sealer at ~400 sqft/gal goes 5–7 years. Standard 16'×50' driveway = 800 sq ft = 4 gallons (one 5-gallon pail) for asphalt or 2 gallons for concrete.

HOW IT WORKS

The coverage math

The calculator multiplies length by width, multiplies by the number of coats, and divides by the coverage rate for your material, then rounds up to whole gallons and 5-gallon pails. Coverage swings hard with the surface, so picking the right material matters more than the dimensions.

  • Asphalt sealcoat: about 250 sq ft per gallon on sound, cured asphalt.
  • New or very rough asphalt: roughly 200 sq ft per gallon, since the open surface drinks more.
  • Concrete penetrating sealer: about 400 sq ft per gallon because it soaks in instead of building a film.

Asphalt sealcoat, every 2 to 3 years

Asphalt oxidizes — sun and water break down the binders that hold the aggregate together. Sealcoat replenishes a black surface film that protects the asphalt underneath, so resealing every 2 to 3 years keeps a driveway sound for 20-plus years instead of cracking and crumbling in 7 to 10. Resist the urge to reseal yearly, though; piling on coats builds a brittle crust that peels.

Concrete sealer works differently

Concrete sealers penetrate the surface — silane, siloxane, or acrylic — rather than forming a thick film. Coverage is much higher, around 400 sq ft per gallon, and a good penetrating sealer lasts 5 to 7 years (sometimes up to 10 in mild climates). Salt resistance and stain protection are the main payoffs. Film-forming acrylic sealers look glossier but wear faster, often needing a recoat every 1 to 3 years.

The weather window

Both asphalt and concrete sealers need surface temps above 50°F and at least 24 hours of dry weather before and after application. Mid-summer is ideal; early spring or fall risks a rain interruption that ruins an uncured coat. Clean and let the surface fully dry first — sealer over dirt, oil, or moisture will not bond.

What it costs to seal a driveway

Sealing a driveway yourself is one of the cheapest home projects going. A 5-gallon pail of asphalt sealer runs about $18 to $65 — budget coal-tar emulsion at the low end, mid-range asphalt emulsion around $28 to $45, and premium acrylic or polymer-modified sealer up to $65. A standard 800 sq ft driveway takes one to two pails for two coats, so figure $40 to $130 in material. Concrete is sold by the gallon at $30 to $80 and covers 200 to 500 sq ft.

Hiring it out costs about $1.25 to $1.50 per square foot for asphalt, including labor, which works out to roughly $280 to $870 for an average driveway and about $571 as a common middle figure. Concrete sealing runs higher at $1 to $3 per square foot installed. Doing it yourself typically saves 40 to 60 percent because the labor is the expensive part.

  • Asphalt sealer: $18 to $65 per 5-gallon pail.
  • Concrete sealer: $30 to $80 per gallon (covers 200 to 500 sq ft).
  • DIY material (standard 800 sq ft driveway): about $40 to $130 for asphalt.
  • Pro, installed: $1.25 to $1.50 per square foot for asphalt; $1 to $3 for concrete.

For a paint-plus-labor estimate on other surfaces, use thepaint cost calculator.

Frequently asked questions

How much does it cost to seal a driveway?+
DIY is cheap: a 5-gallon pail of asphalt sealer runs about $18 to $65, so a standard 800-square-foot driveway costs roughly $40 to $130 in material. Hiring a pro runs about $1.25 to $1.50 per square foot, or near $280 to $870 for the average asphalt driveway, with $571 a common middle figure.
How much does driveway sealer cost per 5-gallon pail?+
A 5-gallon pail of asphalt driveway sealer costs about $18 to $65 at retail: budget coal-tar emulsion $18 to $28, mid-range asphalt emulsion $28 to $45, and premium acrylic or polymer-modified sealer $45 to $65. Concrete sealer is sold by the gallon at $30 to $80 and covers 200 to 500 square feet.
How much driveway sealer do I need?+
A standard 16-by-50-foot driveway is about 800 sq ft. Asphalt sealcoat covers roughly 250 sq ft per gallon, so two coats need about one 5-gallon pail; a penetrating concrete sealer at ~400 sq ft per gallon needs about 2 gallons. Enter your size above for the exact figure.
How often should you seal an asphalt driveway?+
Every 2 to 3 years for asphalt sealcoat. Freeze-thaw climates push toward the shorter end, while dry, mild climates can stretch it. Sealcoat too often and you build a brittle, peeling crust, so do not reseal yearly.
How long does concrete driveway sealer last?+
A penetrating concrete sealer (silane or siloxane) typically lasts 5 to 7 years, and some go up to 10 in mild climates, because it soaks in rather than forming a film. Film-forming acrylic sealers wear faster, often needing a recoat every 1 to 3 years.
Is driveway sealer the same for asphalt and concrete?+
No. Asphalt uses a black sealcoat that replenishes a surface film; concrete uses a clear penetrating sealer that soaks in to repel water and salt. They are not interchangeable — using the wrong one wastes the product and can fail.
What temperature do I need to seal a driveway?+
Surface temps above 50°F and at least 24 hours of dry weather before and after application. Mid-summer is ideal; early spring or fall risks a rain interruption that ruins an uncured coat.
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