Driveway Sealing Calculator

Calculate sealcoat material needed and cost for your driveway.

By Konstantin Iakovlev · Updated September 2026 · Source: HomeAdvisor

DIY Cost

$150.00

Pro Cost

$160.00 - $320.00

Materials & Cost

Area800 sq ft
Coats Needed1
Sealant Needed10 gallons
DIY Estimate$150.00
Professional Low$160.00
Professional High$320.00

Use the Driveway Sealing Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only. Results are estimates from the numbers you enter and the assumptions described on this page; check them against local building codes, product specifications and current prices, and have structural, electrical or gas work designed or checked by a licensed professional.

How It Works

Buy too much sealcoat and you waste money; buy too little and you stall halfway through the job, which can mean delays and a patchy finish. This estimator pins down how much material your driveway needs and what it will cost, so neither problem catches you out.

Material needs start from your driveway's surface area in square feet. The tool plans one coat for a driveway in good or fair condition and two coats for one in poor condition, at 80 square feet per gallon per coat (400 square feet per 5-gallon bucket), and rounds up to whole gallons. Cost is priced by area rather than by bucket: the DIY figure is $0.15 per square foot ($0.20 for a poor surface) plus a flat $30, and the professional range is $0.20-$0.40 per square foot.

Accurate measurement matters, because even a small mistake ripples through the whole estimate. Driveways that are heavily cracked or have never been sealed tend to drink up extra material on that first coat thanks to higher absorption. Budget separately for the things the sealcoat figure leaves out, including cleaning supplies, crack filler, and application tools.

Example: Standard Suburban Driveway Sealing

  1. 1 A rectangular driveway is 40 feet long and 12 feet wide and in fair condition, so the calculator plans one coat.
  2. 2 Area = 40 × 12 = 480 sq ft. Sealant: 480 ÷ 80 = 6 gallons, a little more than one 5-gallon bucket.
  3. 3 DIY estimate: 480 × $0.15 + $30 = $102. Professional range: 480 × $0.20 to 480 × $0.40 = $96-$192.
  4. 4 In poor condition the calculator switches to two coats: 12 gallons and a DIY estimate of 480 × $0.20 + $30 = $126. Crack filler and cleaning supplies are extra.

Source: HomeAdvisor · Last updated: September 2026

Frequently Asked Questions

How much does it cost to seal a driveway?
This calculator prices DIY sealcoating at $0.15 per square foot ($0.20 for a driveway in poor condition) plus a flat $30, and professional application at $0.20-$0.40 per square foot. For a 600 square foot driveway that is $120 DIY ($150 if it is in poor condition) or $120-$240 professionally.
How often should you seal an asphalt driveway?
Seal every 2-3 years for optimal protection. New driveways should wait 6-12 months before the first seal to allow the asphalt to cure. Over-sealing (annually) can cause the coating to peel and crack.
How much sealant do I need for my driveway?
This calculator assumes 80 square feet per gallon per coat, so one 5-gallon bucket covers about 400 square feet with one coat, and it plans two coats only for a driveway in poor condition. Product labels vary, and porous or never-sealed asphalt absorbs more, so check the coverage on the bucket you buy. Measure your driveway length times width to calculate square footage.

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