Maintenance Tool

Asphalt Sealer Calculator

Sealcoating extends the life of your asphalt. Calculate exactly how many gallons and 5-gallon buckets you need to buy.

Driveway Length (ft)

Driveway Width (ft)

Sealer Type

Number of Coats

Total Sealer

gallons

Buy This Many

5-gallon buckets

Total Area

sq ft

Pro Tip: Buy 1 extra bucket. Running out of sealer in the middle of a driveway leaves an ugly seam.

Sealcoating Coverage Rates

The coverage rate of asphalt sealer varies depending on the type of sealer and the condition of your driveway. An older, highly porous driveway will soak up much more sealer on the first coat than a smooth, relatively new driveway.

First Coat: Expect 70-80 sq ft per gallon. The asphalt acts like a sponge.
Second Coat: The first coat seals the pores, so the second coat spreads much further (often 100-120 sq ft per gallon).

This calculator averages these rates to give you a safe, total purchasing estimate.