Sealer Inputs
Adjust coverage for rough, porous, or weathered asphalt.
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Sealcoat material estimate
Asphalt Sealer Calculator
Estimate how much asphalt driveway sealer to buy before sealcoating. Adjust for coats, surface condition, coverage rate, waste, and pail price. Use it as a driveway sealer, blacktop sealer, or sealcoat coverage calculator for any home asphalt job.
Calculator
Asphalt Sealer Calculator
Estimate gallons, pails, and cost for driveway sealcoating.
How much does 5 gallons of asphalt sealer cover?
A 5-gallon pail of asphalt driveway sealer covers about 400 to 500 square feet in one coat on smooth, previously sealed asphalt, at 80 to 100 square feet per gallon. On rough or porous asphalt the same pail covers about 300 to 375 square feet, because worn asphalt drinks more material. Most driveways get two coats, so plan on roughly 200 to 250 square feet of finished two-coat coverage per pail.
| Asphalt condition | 1 coat per 5-gal pail | 2 coats per 5-gal pail |
|---|---|---|
| Smooth or previously sealed | 400 to 500 sq ft | 200 to 250 sq ft |
| Weathered | 340 to 425 sq ft | 170 to 210 sq ft |
| Rough or porous | 300 to 375 sq ft | 150 to 190 sq ft |
To size a specific driveway, enter its square footage in the calculator above. As a quick guide, a 1,000 square foot driveway needs about 20 to 25 gallons, or four to five pails, for two coats, plus 10 percent for waste and edge work.
Sealer is not crack repair
Sealcoat protects and darkens the surface, but cracks and soft spots should be repaired before sealing. Crack filler and patching material are separate from sealer coverage.
What affects sealer coverage
- Rough or porous surfaces use more material.
- Two thin coats usually perform better than one heavy coat.
- Old unsealed asphalt can absorb more sealer.
- Weather, cleaning, and drying time affect the finished result.
Formula
area_sq_ft * coats * surface_factor / coverage_sq_ft_per_gallon * waste_factorThese are planning estimates. Confirm local material density, supplier tickets, contractor scope, drainage, base condition, and local code before buying material or signing a contract.
FAQ
Asphalt Sealer Calculator FAQ
How much does 5 gallons of asphalt sealer cover?
About 400 to 500 square feet in a single coat on smooth, previously sealed asphalt, or 300 to 375 square feet on rough or porous asphalt. Over the typical two coats, plan on roughly 200 to 250 square feet per 5-gallon pail.
How many gallons of asphalt sealer do I need?
Divide driveway area by the coverage rate, multiply by the number of coats and surface factor, then add waste. A 1,000 square foot driveway needs about 20 to 25 gallons for two coats.
How much sealer do I need for a 1,000 sq ft driveway?
About 20 to 25 gallons, or four to five 5-gallon pails, for two coats at 80 to 100 square feet per gallon. Add 10 percent for waste and edge work.
How many coats of driveway sealer do I need?
Two thin coats for a fresh sealcoat or badly weathered asphalt. One coat is enough for a maintenance reseal on asphalt sealed within the last few years.
Does sealer fill driveway cracks?
No. Use crack filler first, then sealcoat after repairs are ready.
Related tools
Plan the Next Part of the Job
Asphalt CalculatorFree asphalt calculator for driveway and paving projects. Estimate square feet, cubic yards, tons, waste, truckloads, material cost, labor, base prep and cost per square foot.
Driveway CostEstimate asphalt driveway cost by square footage, thickness, asphalt price, base prep, labor, haul cost and waste. Compare material cost and total project range.
TonnageConvert asphalt square feet and compacted thickness to tons. Estimate order tons, cubic yards, waste and truckloads for driveways, overlays, patches and private lanes.
MillingsEstimate asphalt millings tons for a driveway, lane or parking pad. Calculate loose or compacted recycled asphalt volume, waste and material cost.
BlacktopFree blacktop calculator for driveway tons, cubic yards, truckloads, waste and cost per square foot. Use length, width, thickness and local pricing.
Asphalt vs ConcreteCompare asphalt and concrete driveway cost by square footage, installed price, sealcoating interval, maintenance cost and replacement timing.
When to SealcoatHow long to wait after paving, how often to re-seal, best weather window, and the 8 most common sealcoating mistakes homeowners make.
Quote CheckerCheck an asphalt driveway quote for missing compacted thickness, base depth, removal, drainage, equipment, insurance and pressure-sales risks.
Sealcoating deep-dives
Get the Sealing Job Right
The calculator gets gallons and cost. These guides cover chemistry, technique, and the prep steps that decide whether a fresh coat lasts two years or six months.
How to DIY Sealcoat a DrivewayThe exact prep, conditions, and method that actually lasts. Mistakes to avoid before the first squeegee pass.
Coal Tar vs Asphalt EmulsionWhich sealer chemistry fits your climate and local rules. Real coverage, dry time, and bans by state.
Weeds in Driveway CracksWhy they grow there, how to kill them, and how to keep them gone before you seal.
Next step
Need to check the written quote too?
After estimating quantities and cost, use the quote checker to review thickness, base prep, drainage, removal, equipment, and sales-pressure red flags.
Open quote checkerSealcoat coverage references: National Center for Pavement Preservation and product technical data sheets from major sealer manufacturers.