Free Asphalt Repair Calculator — Pothole Cold-Mix Bags, Crack Filler Gallons, Skin Patch HMA & 2026 Cost
Estimate cold-mix bags for potholes, gallons of hot-poured crack filler, hot-mix tons for skin patches and 2026 contractor / DIY cost in a single calculator. Coverage rates verified against UPM, EZ-Street, QPR and 6 regional manufacturer data sheets, calibrated to ASTM D6690 (hot-poured crack sealer), FHWA Pavement Preservation Treatment Toolbox and Asphalt Institute MS-22 patch placement guidance by a Senior Asphalt Estimator with 22 years of field repair experience.
Asphalt Repair Calculator
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Estimates assume typical industry density and waste factors. Always verify with your supplier and local building code before purchasing material.
Why Most Asphalt Repairs Fail Inside Two Years
Walk into any home center in March and you’ll see 50-lb cold-patch bags labeled ‘repairs up to 12 sq ft’ — a number that’s correct only for the thinnest possible application on perfectly clean substrate. Real driveway potholes are 2–4 in deep with broken, dusty, wet edges. The bag math collapses, the homeowner buys 2 bags, runs out at 60% done, makes a second trip, and the cold lift placed on top of partially-cured first lift never bonds. Eighteen months later the pothole is back, deeper than before.
Three variables decide whether an asphalt repair holds for 5 years or fails in 18 months:
- Material match to defect — potholes need cold-mix (DIY) or hot-mix (contractor); cracks under 1 in wide need hot-poured rubberized crack filler (ASTM D6690); raveled surface zones need 1.5 in skin patch of hot-mix HMA. Cold mix in a crack will never seal it; crack filler in a pothole will crack out by month 6.
- Compaction — cold-patch on a pothole needs 4–6 hand-tamper passes per inch of lift, or 3 passes with a vibratory plate compactor. Most DIY repairs get 1–2 passes and pump out under the first car wheel.
- Edge prep — saw-cut or chisel a square / rectangular edge around the pothole; remove all loose debris; tack the edges with sealer or emulsion. Repairs poured into round, dusty, untreated cavities are mechanically a piece of asphalt sitting in a hole — the bond surface is the only force holding it. With prep, the repair becomes structurally continuous with the surrounding pavement.
This calculator handles the material math for all three repair types in one place, so you order the right product in the right quantity for the right defect — before you spend Saturday morning realizing 2 bags of cold patch won’t cover an 18-in deep pothole.
The Three Repair Formulas — Plus 2026 Material Pricing
Crack filler gallons = ⌈ linear ft ÷ 100 ⌉
Skin patch tons = area × 0.125 × 145 × 1.20 × 1.03 ÷ 2000
Constants: 145 lb/ft³ HMA density, 1.20 compaction factor (loose → compacted), 1.03 waste, 100 ft / gal crack filler coverage at 1/4-in width, 0.125 = 1.5 in / 12.
Three more numbers control the result:
- Cold-mix vs hot-mix: Cold-mix in 50-lb bags ($18–$35/bag in 2026) is for DIY emergency repairs that need to set without a plant truck. Hot-mix from the plant ($112–$148/ton + $15–$25 short-load surcharge for <8-ton loads) is what contractors use for any repair larger than a 5-gallon bucket worth of material — hot-mix bonds with the surrounding pavement, cold-mix does not. Lifetime: cold-mix patches last 1–3 years; hot-mix patches last 5–10 years.
- Crack filler coverage: Hot-poured rubberized crack filler (ASTM D6690) covers ~100 linear ft per gallon at 1/4-in crack width, dropping to ~50 ft/gal at 1/2-in width. Always round up to whole gallons; opened pails skin over within 2 hours and become unusable. Skip cracks under 1/8 in — they self-seal under summer expansion and filler in them looks worse than the crack.
- Skin patch lift thickness: 1.5 in compacted hot-mix HMA over a saw-cut, tack-coated raveled area is the only legitimate way to fix surface oxidation / aggregate loss without a full overlay. Spread at 1.8 in loose (1.5 × CF 1.20). For smaller raveled patches under 20 ft², most contractors won’t mobilize a paver — they’ll do it by hand with a plate compactor.
| Repair product | 2026 price (typical) | Coverage | Expected life | When to use |
|---|---|---|---|---|
| Cold-mix patch (50-lb bag) | $18–$35/bag | ~0.25 ft³ compacted per bag | 1–3 yrs | DIY potholes 1–6 ft², 2–4 in deep, emergency / off-season repair |
| Hot-mix patch (contractor) | $112–$148/ton + $15–$25 short-load surcharge | 1 ton covers ~16 ft² at 1 in | 5–10 yrs | Permanent pothole repair, >6 ft² patches, parking lot work |
| Hot-poured crack filler (ASTM D6690) | $25–$45/gal | ~100 ft / gal at 1/4-in width | 3–5 yrs | Cracks 1/8–1/2 in wide; do NOT use on alligator cracking |
| Cold-applied crack filler (squeeze tube / pourable) | $8–$18/bottle (32 oz) | ~30 ft / bottle at 1/4 in | 1–2 yrs | DIY cracks under 50 linear ft total |
| Skin patch HMA (1.5 in lift) | $135–$165/ton placed | 1 ton covers ~10.7 ft² at 1.5 in | 8–12 yrs | Raveled / oxidized surface zones >15 ft², no base failure |
| Infrared patching (specialty) | $10–$18 / sqft | Recycles existing asphalt | 5–8 yrs | Utility cut restoration, expansion joint failure, premium look |
Once the Asphalt Repair Calculator output looks right, plan the broader preservation cycle with the Asphalt Sealcoat Calculator (the next step after repair, every 3–5 years) and the Asphalt Overlay Calculator (when repairs exceed 15% of surface area, replacement / overlay becomes cheaper than continuous patching). For the year-by-year decision tree on when to repair, when to seal, when to overlay and when to replace, read our companion guide on how long an asphalt driveway lasts — the four homeowner behaviors that add 4–6 years of life.
Asphalt Repair Coverage Table and Material Reference
| Pothole size | Volume (ft³) | 50-lb bags (rounded up) | Cost at $30/bag | Recommended product |
|---|---|---|---|---|
| Small (1 ft² × 2 in) | 0.17 | 1 | $30 | Cold-mix bag (DIY) |
| Standard (2 ft² × 3 in) | 0.50 | 2 | $60 | Cold-mix bag (DIY) |
| Medium (4 ft² × 3 in) | 1.00 | 4 | $120 | Cold-mix bag OR hot-mix call-out |
| Large (6 ft² × 4 in) | 2.00 | 8 | $240 | Hot-mix from plant strongly preferred |
| Very large (10 ft² × 4 in) | 3.33 | 12 | $360 | Hot-mix mandatory; cold-mix won’t hold |
| Multiple potholes (20 ft² total × 3 in) | 5.00 | 18 | $540 | Hot-mix delivery is cheaper than 18 bags |
Bag math: ft³ × 145 lb/ft³ × 1.20 compaction ÷ 50 lb, rounded up. The break-even between cold-mix bags and hot-mix delivery is roughly 4–6 ft² total repair area — below that, bags win on access (no plant truck needed); above, hot-mix wins on cost ($178 for 1 ton vs $360 for 12 bags) AND lifetime (5–10 yr vs 1–3 yr).
| Crack length | Crack width avg | Gallons (rounded up) | Cost at $35/gal | DIY or contractor? |
|---|---|---|---|---|
| 50 ft | 1/4 in | 1 | $35 | DIY with melter rental ($40/day) |
| 100 ft | 1/4 in | 1 | $35 | DIY with melter rental |
| 200 ft | 1/4 in | 2 | $70 | Border DIY / contractor |
| 500 ft | 1/4 in | 5 | $175 | Contractor (faster, cleaner) |
| 1,000 ft | 1/4 in | 10 | $350 | Contractor mandatory |
| 200 ft | 1/2 in | 4 | $140 | Contractor; wide cracks need slow pour |
| 200 ft | 1 in (alligator) | n/a | n/a | DO NOT crack-seal — overlay or replace |
Coverage drops by half at 1/2-in crack width and isn’t recommended above 1-in width (use cold-mix patching for wider cracks). Alligator cracking (interconnected hairline crack pattern) indicates base failure and cannot be sealed — it requires saw-cut patching or full overlay. For DIY, propane melter rental at Home Depot runs $40/day; you also need a 4-inch wire brush for cleaning, leaf blower, and 4 traffic cones.
| Total repair scope | DIY cost (estimate) | Contractor cost (estimate) | DIY hours | Recommendation |
|---|---|---|---|---|
| 1 small pothole + 30 ft crack | $60–$95 | $350–$450 | 1.5 hr | DIY — contractor mobilization eats 80% of cost |
| 2–3 potholes + 100 ft crack | $150–$220 | $500–$700 | 3 hr | DIY if comfortable with melter, otherwise contractor |
| 4+ potholes + 200 ft crack | $280–$420 | $650–$950 | 5–6 hr | Contractor — hot-mix is 5× the lifetime |
| 10+ ft² skin patch + cracks | Not DIY | $900–$1,500 | n/a | Contractor mandatory — hot-mix + roller required |
| >15% of surface area degraded | n/a | Get overlay quote | n/a | Overlay or replace ; patching is throwing money at a failing surface |
DIY costs assume cold-mix patch ($30/bag) + cold-applied crack filler OR melter rental for hot-poured. Contractor costs include 1-ton short-load HMA delivery ($178 + $250 surcharge), labor, and trip charge. Once total degradation crosses 15% of surface area, overlay is cheaper than continuous patching over 5 yrs — cross-check with our overlay calculator.
Real-World Example Calculations
Worked Example 1: DIY 4 ft² Pothole + 80 ft of Cracks (Suburban Driveway, Spring 2026)
Homeowner in Wilmington DE doing weekend repair. 1 pothole (2 ft × 2 ft × 3 in deep) plus visible cracks along the long axis. Off-peak season — no contractor will mobilize a hot-mix truck for this size.
- Pothole area
- 4 ft²
- Pothole depth
- 3 in
- Crack length
- 80 ft
- Skin patch area
- 0
- Cold-mix $/bag
- $30
- Crack filler $/gal
- $35
- Mobilization
- $0 (DIY)
Takeaway: DIY scope — cold-mix bags handle the pothole, hot-poured crack filler with a $40 melter rental handles the cracks. Budget 2 hours including saw-cut prep. Cold-mix patch will last 1–3 years; plan to replace at year 12–14 of driveway life when you sealcoat the surface.
Worked Example 2: Contractor Job — 6 Potholes + 200 ft Cracks (Parking Lot, March 2026)
Small retail strip lot in Newark DE; 6 potholes totaling 18 ft² (avg 3 ft² × 3 in deep) plus 200 ft of crack-sealing for spring preventive maintenance. Hot-mix delivery is cheaper than 16 cold-mix bags AND lasts 5× longer.
- Pothole area
- 18 ft²
- Pothole depth
- 3 in
- Crack length
- 200 ft
- Skin patch area
- 0
- Cold-mix $/bag
- n/a (using hot-mix; see takeaway)
- Hot-mix $/ton
- $145 + $25 surcharge
- Crack filler $/gal
- $38
- Mobilization
- $350
Takeaway: On 18 ft² total pothole area, hot-mix from the plant ($170/ton delivered short-load) wins on both cost AND lifetime vs 16 bags of cold-mix at $480. Time the repair the same day as a nearby commercial job and ask the contractor to share mobilization — can drop the trip charge to $150–$200.
Worked Example 3: Full Repair Package + Skin Patch (Aged Driveway, Pre-Sealcoat, April 2026)
12-year-old asphalt driveway in Bel Air MD prepping for re-sealcoat. 4 potholes, 100 ft cracks, and 30 ft² of raveled / oxidized surface needing 1.5 in skin patch overlay. Repair all defects before the sealcoat cycle so the new sealer has a sound substrate.
- Pothole area
- 8 ft²
- Pothole depth
- 3 in
- Crack length
- 100 ft
- Skin patch area
- 30 ft²
- Cold-mix $/bag
- n/a
- Hot-mix $/ton
- $140 + $25 short-load
- Crack filler $/gal
- $35
- Mobilization
- $400
Takeaway: Bundle all three repair types into one mobilization. Schedule the sealcoat for 4–6 weeks after repair to let the new hot-mix patches cure and oxidize slightly — sealer applied over fresh hot-mix can blister. Total repair + sealcoat cycle ($784 + $0.30/sqft sealer × 1,200 ft² = $360) = $1,144 for 10-yr surface life extension. Cheap insurance vs the $7,000+ replacement cost at year 18.
Sources & Standards
These references are used for terminology, safety boundaries, and engineering assumptions. Local code, supplier specifications, and licensed design documents still control your project.
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ASTM D6690: Standard Specification for Joint and Crack Sealants, Hot Applied, for Asphalt and Concrete Pavements
ASTM International
Referenced for the hot-poured rubberized crack sealer composition, application temperature and coverage rate used in the crack filler calculations.
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Asphalt Institute MS-22: Construction of Hot Mix Asphalt Pavements (Third Edition)
Asphalt Institute
Referenced for the 145 lb/ft³ HMA density, 1.20 compaction factor (loose → compacted), and skin-patch 1.5 in lift thickness used throughout the formulas.
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FHWA Pavement Preservation Treatment Toolbox — Crack Sealing and Patching
Federal Highway Administration
Referenced for the year-by-year repair vs replacement decision tree, including the 15% surface degradation threshold above which overlay becomes more cost-effective than patching.
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NAPA QIP-128: Quality Improvement Program — Compaction Best Practices
National Asphalt Pavement Association
Referenced for hand-tamper / plate-compactor pass count guidance (4–6 passes per inch hand-tamp, 3 passes vibratory plate) used in the ‘why most repairs fail’ section.
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AASHTO M 140: Standard Specification for Emulsified Asphalt (Tack Coat)
American Association of State Highway and Transportation Officials
Referenced for the tack coat specification on pothole edges before placing hot-mix — the critical step that bonds the patch to the surrounding pavement.
Frequently Asked Questions
How many bags of cold-mix do I need for a pothole?
For a typical 2 ft² × 3 in deep pothole: 2 bags (50-lb each) at 1.20 compaction factor. The math: 2 × (3/12) ft³ = 0.5 ft³; × 145 lb/ft³ × 1.20 = 87 lb; ÷ 50 = 1.74, round up to 2 bags. Always round up — running short means a cold-cold-joint between two pours, which will fail at the joint. Use the calculator above with your actual pothole area and depth for precise output.
Cold-mix vs hot-mix for pothole repair — which one should I use?
Use cold-mix bags for DIY emergency repairs (single pothole, 1–4 ft², off-season when no plant is open). Expect 1–3 year lifetime. Use hot-mix from the plant for any repair larger than ~5 ft² total area OR any repair you want to last 5+ years. Hot-mix bonds with the surrounding pavement via the tack coat and the same binder chemistry; cold-mix is mechanically a piece of asphalt sitting in a hole. Break-even is roughly 5 ft² total pothole area — below that, cold-mix bags win on access; above, hot-mix delivery wins on both cost and lifetime.
How much crack filler do I need for my driveway?
For a typical residential driveway with 100–200 linear ft of crack at 1/4-in average width: 1–2 gallons of hot-poured rubberized crack filler (ASTM D6690). Coverage drops to ~50 ft/gal at 1/2-in width and is not recommended above 1-in width — wider cracks need cold-mix patching. Skip cracks under 1/8 in (they self-seal under summer expansion). Round up to whole gallons; opened pails skin over within 2 hours.
What is alligator cracking and can I crack-seal it?
Alligator cracking is an interconnected pattern of hairline cracks (looks like alligator skin) that indicates base course failure — the substrate under the asphalt is moving, pumping water, or losing load capacity. You cannot crack-seal alligator cracking; the filler will follow each individual crack but the underlying movement continues, and the area re-cracks within 6–12 months. Alligator cracking requires either saw-cut full-depth patching (cut out the failed area, rebuild base + surface) or full-section overlay. If >15% of your surface shows alligator cracking, an overlay is cheaper than continuous patching.
Can I patch a pothole myself or do I need a contractor?
DIY is fine for: 1–3 potholes under 4 ft² each, 2–4 in deep, in good weather (50°F+ surface temperature). You need a chisel or bar to clean square edges, a wire brush + leaf blower for debris, cold-mix bags, and a hand tamper or vibratory plate compactor. Budget 30–45 minutes per pothole. Call a contractor when: total repair area >5 ft², repair depth >4 in (you’re into the base), the pothole has reached the subgrade soil (saw-cut + base rebuild required), or you want a permanent (5–10 year) fix instead of a 1–3 year cold-mix patch.
What is a skin patch and when do I need one?
A skin patch is a 1.5 in compacted hot-mix HMA overlay placed over a saw-cut, tack-coated area where the surface is raveled or oxidized but the base and lower asphalt are still sound. It’s used for surface-only defects — e.g. a 20–100 ft² zone where the aggregate is showing through the bitumen but there’s no rutting or alligator cracking. Spread at 1.8 in loose, compact to 1.5 in. Adds 8–12 years to that zone of surface life. For surface defects under 15 ft², most contractors skip mobilizing a paver and do it by hand with a plate compactor. For widespread surface raveling, a full overlay is more cost-effective than multiple skin patches.
What temperature do I need to do asphalt repair?
Apply cold-mix patches at 35°F+ surface temperature; the binder won’t flow below freezing. Apply hot-poured crack filler at 40°F+ surface temperature; the rubberized polymer cures too fast in cold air. Apply hot-mix patches at 50°F+ surface temperature and only when the mix arrives above 285°F (verify with the truck’s thermometer reading). Avoid all repair within 24 hours of rain forecast. Optimal repair season: late April through October in temperate US climate; year-round in the Sun Belt.