Driveway Sealcoat Calculator

Calculate how many gallons of driveway sealer you need for 1-coat or 2-coat applications. Enter driveway dimensions to get gallon count, 5-gallon pails, and crack filler tubes needed.

ft
ft
sq ft/gal
Gallons Needed (5% waste)
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Driveway Area —
5-Gallon Pails —
Extended More scenarios, charts & detailed breakdown ▾
ft
ft
Area (sq ft)
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Gallons (80 sq ft/gal) —
5-Gal Pails —
Professional Full parameters & maximum detail ▾
ft
ft
$
ft

Materials

Driveway Area (sq ft) —
Sealer Gallons —
5-Gal Pails —
Crack Filler Tubes —

Cost & Notes

Est. Sealer Cost —
Application Note —

How to Use This Calculator

  1. Enter your driveway length and width in feet.
  2. Set coverage rate (default 80 sq ft/gal for 1-coat, 40 sq ft/gal for 2-coat).
  3. Results show gallons with 5% waste and 5-gallon pails. Use Extended tabs for 1-coat vs 2-coat comparison or crack filler add-on.

Formula

Area = Length × Width

Gallons = (Area ÷ Coverage) × 1.05

Pails = CEILING(Gallons ÷ 5)

Example

Example: 40 ft × 16 ft driveway, 1-coat at 80 sq ft/gal → 640 sq ft ÷ 80 × 1.05 = 8.4 gallons → 2 pails of 5-gallon sealer.

Frequently Asked Questions

  • One gallon of asphalt driveway sealer covers approximately 80 sq ft for a single coat. For two coats, estimate 40 sq ft per gallon total.
  • Seal a new asphalt driveway after 6–12 months, then recoat every 3–5 years. Over-sealing can cause buildup and peeling, so avoid sealing every year.
  • Apply driveway sealer when surface temperature is between 50°F and 90°F. Avoid application if rain is expected within 24 hours or if temperatures will drop below 50°F overnight.
  • Yes, coal tar sealer is banned in several states and municipalities including Minnesota, Washington state, and Washington DC due to polycyclic aromatic hydrocarbon (PAH) runoff. Check local regulations before purchasing.
  • Fill cracks wider than 1/4 inch with rubberized asphalt crack filler before sealing. One tube of crack filler covers about 30 linear feet of crack.

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Sources & References (5) ▾
  1. NAPA – Asphalt Pavement Alliance Maintenance Guide — National Asphalt Pavement Association
  2. FHWA Pavement Preservation and Maintenance — Federal Highway Administration
  3. AAPC – Asphalt Maintenance Technical Guide — Asphalt Pavement Alliance
  4. Bob Vila – Driveway Sealing Guide — Bob Vila Media
  5. Family Handyman – How to Seal an Asphalt Driveway — Family Handyman