Asphalt Calculator
Estimate how much asphalt you need by area and depth — plus bags and total cost. Switch between imperial and metric units.
Asphalt Calculator
Estimate how much you need — and the cost.
- tonnes 1.1
- kilograms 1096
- pounds 2417
Quick coverage reference
One US ton covers about 165 sq ft at 1 in deep / about 82 sq ft at 2 in deep (at 145 lb/cu ft).
How it's calculated
- Compacted hot-mix asphalt density is about 145 lb/cu ft (= 3915 lb/cu yd); roughly 140–150 depending on mix gradation. We use the industry-standard 145.
- Residential driveway surface: 2–3 in (compacted); heavy-duty or commercial: 3–4 in; overlay on existing pavement: 1.5–2 in.
Source: inchcalculator.com/asphalt-calculator/ (density 145 lb/cu ft cross-checked)
How much asphalt do I need?
Hot-mix asphalt is sold by weight (the ton), so density drives the estimate. The quantity is the paved area multiplied by the compacted thickness, converted to tons using asphalt's density of about 145 lb per cubic foot.
In practice: tons = area (sq ft) × thickness (in) ÷ 12 × 145 ÷ 2000. At a typical 2-inch driveway thickness, one ton covers roughly 82 sq ft. Enter your area and thickness above and the calculator returns tons (and tonnes) ready to quote against a supplier's per-ton price.
How to measure for asphalt
Measure the surface
Length × width in feet for the area to be paved. Break irregular drives into rectangles and total them.
Set the thickness
2–3 inches compacted for a residential driveway; 3–4 inches for heavier or commercial use; 1.5–2 inches for an overlay.
Read tons needed
The calculator converts area and thickness to tons using standard hot-mix density — the unit asphalt is sold in.
Add for compaction & waste
Loose mix compresses when rolled. Order around 10% extra so the finished thickness is right.
Asphalt thickness & buying tips
Cars are fine on 2–3 inches over a good base; trucks and commercial traffic need 3–4 inches to avoid cracking.
Even perfect thickness fails over a weak base. A compacted gravel sub-base is what makes asphalt last.
Hot mix cools fast and must be laid and rolled quickly, so order the full amount at once rather than in small batches.
Asphalt calculator FAQ
How much does a ton of asphalt cover?
About 165 sq ft at 1 inch thick, or roughly 82 sq ft at the common 2-inch driveway thickness, based on 145 lb/cu ft density.
How thick should an asphalt driveway be?
2–3 inches of compacted asphalt over a solid gravel base is standard for residential driveways.
How much does asphalt weigh per cubic foot?
Compacted hot-mix asphalt weighs about 145 lb per cubic foot (around 3,900 lb per cubic yard).
How do I convert asphalt tons to area?
Divide the tons your supplier quotes by the coverage per ton at your thickness. The calculator does the reverse — area and thickness to tons.
Should I add extra asphalt?
Yes. Order roughly 10% over the calculated amount to allow for compaction, edges, and minor waste during laying.