Sealcoating Material Calculator: How Much Sealer and Crack Fill Do You Need?

Underestimate materials → delay the job. Overestimate materials → waste money.

Use a material calculator to get it right the first time.

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Sealer calculation (coverage rate)

Standard coverage rate: 80 sq ft per gallon (mixed sealer, 2 coats)

Formula:

• Total sq ft ÷ 80 = gallons of sealer (for 2 coats)

Example:

• 3,000 sq ft driveway
• 3,000 ÷ 80 = 37.5 gallons

Adjustments:

• Rough/porous surface → lower coverage (70 sq ft/gallon)
• Smooth surface → higher coverage (90 sq ft/gallon)
• 1 coat vs. 2 coats → cut in half or double

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Crack fill calculation

Standard coverage rate: 150 linear feet per gallon

Formula:

• Total linear ft ÷ 150 = gallons of crack fill

Example:

• 200 linear ft of cracks
• 200 ÷ 150 = 1.3 gallons

Adjustments:

• Wide cracks (>1/2 inch) → lower coverage (100 linear ft/gallon)
• Narrow cracks → higher coverage (200 linear ft/gallon)

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Sand calculation (for traction)

Standard rate: 2–4 lbs per gallon of sealer

Formula:

• Gallons of sealer × 3 lbs = lbs of sand

Example:

• 37.5 gallons of sealer
• 37.5 × 3 = 112.5 lbs of sand

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BidBlitz material calculator

BidBlitz includes a built-in material calculator (Settings → Materials):

1. Enter your sq ft and linear ft
2. Set your coverage rates (or use the defaults)
3. The calculator tells you:
   • Gallons of sealer
   • Gallons of crack fill
   • Lbs of sand
   • Estimated cost (if you enter material prices)

You can also adjust coverage rates per job if the surface is rough or smooth.

Related:

• /features
• /sealcoating-bidding-software

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FAQ

What if I'm using coal tar vs. asphalt emulsion?

Coverage rates are similar, but check your manufacturer's specs. BidBlitz lets you customize coverage rates per product.

Should I round up or down?

Always round up. It's better to have leftover material than to run short and delay the job.

Can I save my material calculations?

Yes — BidBlitz saves material estimates per bid so you can reference them later.

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The bottom line

Material calculators prevent:

• Mid-job material runs
• Overbuying and waste
• Pricing mistakes

BidBlitz includes one built-in.

Start here: /pricing