Asphalt Calculator
Hot-mix tons and yards for any driveway repair or pour
What is asphalt calculator?
An asphalt calculator answers the contractor’s first question on any pour: how many tons do I need delivered. The volume math (area times depth) is straightforward; the wrinkle is that hot-mix is always sold by the ton, never by the cubic yard, and tonnage depends on compacted density.
The default density is 145 lb/ft³, which is the standard for compacted hot-mix asphalt at typical aggregate gradations. Loose mix before rolling is closer to 120-125 lb/ft³, but you order based on the placed-and-compacted volume, so the higher figure is the right one to use.
What depth to choose? Two inches is the standard surface course over an existing prepared base. Four inches is the common full-depth pour for new residential driveways without a separate gravel base. Commercial parking lots run 6 inches or more depending on traffic loads. For a pothole patch, depth is whatever the hole is — usually 2-4 inches.
Bulk vs bagged: asphalt is bulk-only on any real job. Bagged cold-patch from the home center (~50 lb per bag) covers small repairs — about 5 bags for a 2 ft × 3 ft × 3-in deep pothole. Past a single pothole, a hot-mix delivery from a paving supplier is the only practical option.
The 10% waste factor default covers spread loss, joint overlap, and the fact that hot-mix cools fast: you can’t recover what doesn’t go down before it sets. For small or irregular pours, bump to 15%. For straight long driveways with experienced crews, 5% is sometimes enough — but 10% is the safe default.
When to use a asphalt calculator
- Pothole and patch repair — Cold-patch or hot-mix for a small driveway pothole. Enter patch dimensions and depth to get pounds and tons for the bag or bucket count.
- Driveway resurface — Lay 2 inches of new hot-mix surface course over a prepared base. Output in tons matches paving-supplier quotes.
- Parking-pad pour — A 20 ft x 30 ft pad at 4 inches takes serious tonnage. The calculator handles both surface and base lifts.
How to use the Asphalt Calculator
- Measure the area — For driveways and pads, multiply length by width. For curved or irregular shapes, break the area into rectangles or use the average-width method and add results.
- Pick a depth — 2 inches is the standard for a hot-mix surface course over an existing base. 4 inches is the typical full-depth pour for a residential driveway. Commercial parking lots run 6+ inches.
- Read the tonnage — Hot-mix asphalt is sold by the ton (~$100-180/ton in 2026). Output shows tons (1 cu yd of compacted asphalt weighs roughly 2.0-2.1 tons at the default density).
- Apply waste factor — 10% covers spread loss, joint overlap, and the fact that hot-mix cools fast — you can't easily recover what doesn't go down. Bump to 15% for small or irregular jobs.
Worked examples
20 ft x 100 ft driveway at 2 in
Input: 20 ft x 100 ft x 2 in depth
Output: 12.3 cu yd / 26.6 tons (with 10% waste)Pothole patch
Input: 2 ft x 3 ft x 3 in depth
Output: 0.06 cu yd / 0.13 tons (260 lb)Cold-patch is sold in 50-lb bags; that's about 5 bags for a small pothole.
30 ft x 40 ft parking pad, 4-in compacted
Input: 30 ft x 40 ft x 4 in depth
Output: 14.8 cu yd / 32.0 tons