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Asphalt Sealer Calculator — Driveway Gallons, Pails & Material Cost

Editable live calculator

Change any input — the result updates immediately

No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Area input Length (ft) Width (ft) Number of coats Product coverage (sq ft/gal/coat) Use the exact product instructions.Project allowance (%) Pail size (gal) Price per pail (optional)

Calculated result

21 gal · 5 pails

Pavement area: 1,000 sq ft

Base sealer need: 20 gal

Order volume with allowance: 21 gal

Purchased volume: 25 gal

4 gal above calculated order volume from pail rounding

Optional pail price not entered.

Show the working

1. Base gallons = 1,000 sq ft × 2 coat(s) ÷ 100 sq ft/gal/coat = 20 gal.
2. Apply 5% allowance = 21 gal.
3. Pails = ceil(21 ÷ 5) = 5.

Coverage, dilution and coat requirements are product-specific. Follow the sealer technical instructions; crack repair, patching and additives are separate quantities.

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