Landscaping calculator

Asphalt sealer

Whole gallons of driveway sealer from area, coats and the labelled coverage per gallon.

Reviewed formula · v1.0.0

Project inputs

Enter field measurements. Imperial lengths take feet and inches. Unit conversion happens before the reviewed formula is applied.

Drive lengthft + inFinished sealed lengthftinDrive widthft + inAverage finished widthftinNumber of coatscountCoats of the selected sealerCoverage per gallonft² / galLabel coverage for one coat. 70–100 ft²/gal is common for coal-tar or asphalt emulsionWaste factor%Allowance for texture, cracks and spray loss

All values can be refined when you edit the estimate. This tool does not replace field verification or local requirements.

Calculated result

9gal

Gallons of sealer

FormulaLND-ASL-001

area × coats × (1 + waste) ÷ coverage per gallon

600 ft²

Drive area

2 pails

5 gal pails

8.25 gal

Gallons before rounding

Transparent cost view

Planning rates only. Pick a currency — badges, inputs, and totals follow. Material is a rate. Labour is hours × a planning hourly rate. Equipment and delivery are this-job amounts.

Material ratePlanning · per calculated unit · USDEquipmentPlanning · this job · USDDeliveryPlanning · this job · USDLabour hoursPlanning · this jobLabour ratePlanning · per hour · USDOverhead %%Contingency %%Markup %%Tax %%

Planning defaults are office figures, not a bid. US ready-mix in 2026 often lands around $125–165 per cubic yard delivered; place-and-finish commonly $2–4 per square foot. Replace every rate with a supplier or crew quote before you send the letter.

Indicative FX as of Aug 2026. Planning conversion, not a live bank rate.

Material costUSD 765

Labour (8 h)USD 280

Direct costUSD 1,155

Overhead + contingencyUSD 116

Markup + taxUSD 152

Estimated project totalUSD 1,423

View estimate Quote / invoice Add another item

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Paste on a contractor site or blog. The iframe is a planning takeoff, not a bid.

How this calculator works

A transparent asphalt sealer takeoff.

Drive area times coats, divided by labelled coverage per gallon, with a visible texture allowance, then rounded up to whole gallons.

Worked example. Example: a 50 × 12 ft drive, one coat at 80 ft² per gallon with 10% waste rounds to 9 gallons.

1. Measure the asphalt you will seal, minus grass islands.
2. Enter the coverage from the pail. Oil-spot primer is a different product.
3. A 5-gal pail is five of these gallons — keep the pail count in your head or on the estimate.

Need the broader workflow? Read the landscaping planning guide.

Questions

Questions about asphalt sealer

Is this asphalt tonnage?

No. Use the asphalt calculator for new pavement. This page is a surface sealer only.

Two coats?

Change the coats field. Coverage on the second coat is often higher — you can run it twice with two coverage numbers if the label splits them.

What is the formula ID?

This calculator publishes formula LND-ASL-001, version 1.0.0. The ID stays on the result and on the estimate line.

Is this engineering advice?

No. Construclytic is a planning website, not a registered engineering or contracting firm. Field checks, codes and product data still sit with you.

Does Construclytic fetch live supplier prices?

No. Costs use the rate you enter. Construclytic does not fetch live supplier prices.