Asphalt Sealer Calculator
Gallons equal area divided by coverage, times coats. Coats stay from 1 to 5. Porous pavement drinks more product. Estimate only, not a permit, code check, or engineered design.
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How to estimate sealer gallons
- Enter the sealed area in the same unit the label uses.
- Enter coverage as area per gallon for one coat.
- Enter coats from 1 to 5.
- Read gallons needed. Rough, oxidized asphalt may need a lower coverage number.
Asphalt sealer volume
Area over coverage times coats
| Gallons | (area / coverage) × coats |
|---|---|
| Coats range | 1 to 5 |
| Coverage | Area per gallon per coat |
| Default coats | 2 |
| Omitted | Crack filler tubes and oil-spot primer |
| Compliance | Estimate only. Porosity changes coverage. |
How gallons are computed
gallons = (area / coverage) × coats. Coats truncates to a whole number from 1 to 5. Coverage is area per gallon for a single coat.
Coal tar, asphalt emulsion, and weather
Product chemistry and local rules differ. Labels list coverage ranges for smooth versus rough pavement. Temperature and humidity change cure time, not this gallon math. Paver sealers are a different product family on paver jobs.
Use cases
A 1000 unit driveway at 100 area per gallon with two coats. Comparing one versus two coats on the same coverage. Not a contractor bid.
Limits
No crack length field and no drying-time schedule. Estimate only, not a permit, code check, or engineered design. Nothing is uploaded.