Asphalt Patch Calculator 2026: Bags of Cold Patch by Hole Size
An asphalt patch calculator that tells you how many bags of cold patch to buy for any pothole, plus when to switch from cold patch to hot mix or full-depth repair. Defaults: 120 lb/ft³ cold patch density and 25% overfill to account for traffic-compaction settle. Most 50 lb bags cover about 2.5 ft² at 2-inch depth — that’s the field math I’ve used on hundreds of property-manager pothole walks.
What this asphalt patch calculator tells you:
- Bags of cold patch by hole size (length × width × depth)
- Whether your hole calls for cold patch, hot mix or full-depth repair
- Cost comparison of the 5 major cold patch products in 2026
- How long the patch will actually last in your traffic class
Asphalt patch calculator
Defaults are tuned for cold patch DIY work: 120 lb/ft³ cold patch density, 10% waste, $18-25 per 50 lb bag, 2-inch default depth. For hot mix patches, switch the density to 145 lb/ft³ and price to plant rates ($100-150/ton).
Quick sanity check: a 1 ft × 1 ft pothole at 2-inch depth = 1/6 ft³ ≈ 20 lb of cold patch = less than half a 50 lb bag. A 2 ft × 2 ft pothole at 3-inch depth = 1 ft³ ≈ 120 lb = 2 to 3 bags. Always round up. For full-depth repairs that exceed 4 inches deep, look at the hot mix asphalt calculator instead.
How many bags of cold patch for an X × Y × Z hole
Here’s the field reference table I use when I’m walking a lot with a property manager and we just need a quick bag count.
| Hole size | Depth | Cubic feet | 50 lb bags (with 15% overfill) | Material cost @ $20/bag |
|---|---|---|---|---|
| 6 × 6 inches | 2 inches | 0.042 | 1 bag | $20 |
| 12 × 12 inches | 2 inches | 0.167 | 1 bag | $20 |
| 12 × 12 inches | 4 inches | 0.333 | 2 bags | $40 |
| 18 × 18 inches | 3 inches | 0.563 | 2 bags | $40 |
| 24 × 24 inches | 3 inches | 1.000 | 3 bags | $60 |
| 24 × 24 inches | 6 inches | 2.000 | 6 bags | $120 |
| 36 × 36 inches | 4 inches | 3.000 | 9 bags | $180 |
| 4 × 4 ft | 4 inches | 5.333 | 15 bags | $300 |
For the underlying tons-to-volume conversion that drives these numbers, see the asphalt tonnage calculator — same formulas, larger scale. The detailed density assumptions (145 lb/ft³ hot mix vs 120 lb/ft³ cold patch) are documented in the calculation methodology with sources.
Cold patch vs hot mix patch — when to use which
I get this question on every walk-through and the answer is almost always the same: cold patch is a 6-month-to-3-year fix; hot mix is a 10+ year fix. Match the patch to the planned lifespan of the lot.
| Factor | Cold patch | Hot mix patch |
|---|---|---|
| Material cost | $240-450/ton equivalent | $100-150/ton |
| Minimum order | 1 bag (50-60 lb) | 1 ton plant minimum + delivery fee |
| Workable temperature | 20-90°F ambient | 175°F+ at placement |
| Storage life | 6-18 months in sealed bag | 2-4 hours after mixing |
| Lifespan in residential | 1-3 years | 10-15 years |
| Lifespan in commercial | 6-18 months | 8-12 years |
| Equipment needed | Hand tamper or plate | Vibratory roller |
| Crossover point | Under 15 bags / under 1 ton | Over 1 ton or repeated repairs |
The honest truth I tell every property manager: if you’ve patched the same pothole twice with cold patch and it keeps reopening, the problem isn’t the patch material - it’s the base underneath. At that point you need a full-depth repair (mill out 4-6 inches, repair the base, place hot mix) or the patches will keep failing every winter.
2026 cold patch product comparison: Quikrete, Sakrete, UPM, EZ Street, Aquaphalt
Five products dominate the US retail cold patch market. I’ve used all of them on real jobs — here’s how they actually compare on the dimensions that matter.
| Product | Bag size | Price 2026 | Coverage @ 2″ | Cold-weather rating | Field life |
|---|---|---|---|---|---|
| Sakrete US Cold Patch | 60 lb | $18-22 | ~3 ft² | Down to 0°F | 1-2 yr |
| Quikrete Asphalt Cold Patch | 50 lb | $18-22 | ~2.5 ft² | Down to 0°F | 1-2 yr |
| UPM Cold Patch | 50 lb | $22-28 | ~2.5 ft² | Down to -20°F | 2-3 yr |
| EZ Street | 50 lb | $25-30 | ~2.5 ft² | Down to -10°F | 2-4 yr |
| Aquaphalt 6.0 | 50 lb | $30-40 | ~2.5 ft² | Down to 32°F | 3-5 yr |
What I default to: Sakrete or Quikrete for one-off DIY fixes (price wins, lifespan is fine for residential). UPM or EZ Street for property managers doing 20+ patches per season - the extra $5-8 per bag is worth not having to redo half the patches next year. Aquaphalt for green-certified buildings or sites where petroleum runoff is a regulated concern - it’s water-activated and contains no VOCs.
None of the cold patch products are intended to substitute for hot mix on large patches. If you’re patching more than about 30 ft² of total area, call a plant. The hot mix asphalt calculator has the math for plant orders.
Crack filling vs cold patching vs full-depth patch — how to diagnose
Right tool for right damage. Cold patch is the right answer for maybe a third of what people use it for.
- Hairline cracks (under 1/8 inch wide) — do nothing yet, or seal with elastomeric crack sealer if you’re about to sealcoat. Filling a hairline crack with cold patch is a waste of material.
- Active cracks (1/8 to 1 inch wide) — hot-poured crack sealant or rubberized cold crack filler in a tube. Not cold patch — cold patch needs depth (1-inch minimum) to bond, and a crack doesn’t give it that.
- Spalled edges and surface depressions (under 2 inches deep) — cold patch with thorough tamping. Clean out loose material first. Overfill by 25% and compact in 1-inch lifts.
- Potholes 2-6 inches deep, structurally sound base — cold patch for short-term, hot mix patch for long-term. The decision is mostly traffic and budget.
- Alligator cracking, pumping, or settlement greater than 1 inch — full-depth patch only. Mill out the failed section to 4-6 inches deep, repair the base, place hot mix in 2-3 inch lifts. Cold patch on alligator cracking will fail in months.
- Surface oxidation, no structural distress — sealcoat the whole surface, don’t patch. See the driveway sealing calculator for sealcoat quantity math.
If the failure is widespread enough that you’d be patching 10+ spots on a single driveway, you’re past the point where patching makes sense. Look at the driveway resurfacing calculator and the replace-vs-resurface decision instead.
Asphalt patch calculator FAQ
How do I compact a cold patch without a plate compactor?
Use a 3 lb sledge with a tamp pad or a hand tamper (a 6 x 6 inch plate on a stick). Place the cold patch in 1-inch lifts, not all at once - thicker lifts won’t compact and will fail. After hand-tamping each lift, drive a passenger car back and forth across the patch 8-10 times. That’s usually enough for residential traffic. For high-traffic patches, rent a vibratory plate ($60-90/day) - the difference in patch life is significant.
Can I store leftover cold patch?
Yes - sealed bags store 12-18 months in dry conditions. Once a bag is opened, transfer leftover material to a sealed 5-gallon bucket with a tight lid. Cold patch dries out and hardens when exposed to air, which is why partial bags often turn into a brick within a month if left in the original packaging. EZ Street and UPM specifically market longer storage life because of their binder formulation.
Will cold patch stick to wet pavement?
The water-activated products (Aquaphalt, Quikrete High Performance) are designed for wet conditions and actually need moisture to cure. Standard petroleum-based cold patches (Sakrete, basic Quikrete) work best on dry pavement but will bond on damp surfaces. Heavy rain or standing water in the hole will weaken any patch. Squeegee out standing water before placement; light moisture is fine.
How accurate is the asphalt patch calculator?
Within 1 bag for residential-scale pothole work, and within 10% for commercial patching projects. The variability comes from how aggressively you overfill (25% is the field standard but can range 15-40%) and from how compactly the bag was packed at the factory. For projects over 20 bags, I’d round up by an extra bag or two - the cost is negligible and being short by one bag mid-job is the most common reason patches get rushed.
Can you buy hot mix asphalt in small quantities?
Most plants will sell hot mix in 5-gallon bucket quantities (about 100 lb) if you bring your own container and pick up. Prices are $5-15 per bucket. The constraint is timing: hot mix needs to be placed within 2-4 hours of plant load-out. Call ahead, find out when the plant is loading, and have your prep work done before you pick up. For more than 200 lb of hot mix, ordering a truckload delivered is usually better — the asphalt truckload calculator covers delivery thresholds.