Asphalt crack filler calculator
Crack length, width and depth: you get the volume to fill, 300 ml (10 oz) tubes or pounds of hot-pour sealant.
Purchase quantity
2.28 gal
Net measurement: 1.981 gal · Waste 15 %
- Crack sealant tubes (300 ml)29 tube
- Hot-pour sealant (density 1.1)20.922 lb
- Crack volume1.981 gal
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How it's calculated (visible formula)
volume = length × width × depth × (1 + waste)
- Net geometric measurement, no waste.
- Adjustable waste % for cuts and breakage.
- Purchase rounded up to sellable units (boxes, bags, buckets, boards).
How to calculate it, step by step
- Measure total crack length.
- Measure average width and depth.
- Work out the volume to fill.
- Add 15% waste.
- Convert to tubes or pounds of hot-pour sealant.
Worked example: 164 ft of ⅜ × ⅝ in cracks
- ≈ 7.5 l
- +15% ≈ 8.6 l
→ 29 tubes or about 21 lb of hot-pour sealant.
Common mistakes
- Sealing dirty or damp cracks.
- Filling cracks over 1 in without backer rod.
- Overbanding sealant onto the pavement.
Pro tips
- Clean cracks with a wire brush and blower.
- Use backer rod in deep cracks.
- Fill slightly below the surface.
- Dust fresh sealant with sand so it doesn't track.
From calculation to quote
Add labour, overhead and your margin, and generate the professional PDF.
FAQs
- Which cracks should be sealed?
- About ⅛ to 1 in wide; wider ones need patching.
- Cold or hot pour?
- Hot pour lasts longer; cold tubes suit small repairs.
- Before sealcoating?
- Yes — fill cracks first, then sealcoat.
- Which cracks can't be sealed?
- Alligator cracking signals base failure and needs repair.
- Does cold-pour last?
- Less than hot-pour; fine for small repairs.
- When should I seal cracks?
- Spring or fall, dry cracks and mild temperatures.
Sources and standards
Maintained by Srikanta M · Formula v1.0.0 · Verified 2026-09-10 · Updated 2026-09-10 · Limits: quantity estimation, not structural design or site supervision.