Asphalt Tonnage Calculator 2026: Sq Ft, Sq Yd, Cubic Yards, Depth, and Density to Tons
Convert any paving area into tons of hot mix asphalt instantly. The calculator below uses the industry-standard 145 lb/ft³ density (adjustable 140—50) and a configurable waste factor —the same math your supplier uses on their batch ticket.
This page answers:
- How many tons of asphalt do I need for my project?
- How do I convert square feet to tons or square yards to tons?
- What density should I use for hot mix vs cold patch?
For a plain-English walkthrough of the same math, use the how to calculate asphalt tonnage guide. If your supplier gives you a custom mix density, check it against the asphalt weight and density chart before ordering.
Tonnage calculator
How to calculate asphalt tonnage (formula + worked example)
Multiply length × width × depth in feet to get cubic feet, then apply density and waste:
Tons = Volume(ft³) × Density(lb/ft³) ÷ 2,000 × (1 + Waste%)
= (L × W × D) × 145 ÷ 2,000 × 1.05 [residential default]Convert other inputs into volume first — this is also how to calculate asphalt tonnage from square yards or square feet:
- Square feet: Tons ≈ SF × depth (in) × 0.00604
- Square yards: Tons ≈ SY × depth (in) × 0.054 (the 108.75 lb/SY/in yield shortcut)
- Cubic yards: Tons ≈ CY × 1.96 (about 2 tons per CY of compacted HMA)
- Metric: Tonnes = m² × (mm ÷ 1,000) × 2,322 ÷ 1,000
The full derivation, plus shape-specific formulas (circle, L-shape, road) and a density reference table, is in the how to calculate asphalt tonnage guide.
| Depth | Tons / 100 sq ft | Tons / 100 sq yd | Cubic yards / 100 sq ft |
|---|---|---|---|
| 1.5" | ~0.95 | ~8.55 | ~0.46 |
| 2" | ~1.27 | ~11.43 | ~0.62 |
| 3" | ~1.90 | ~17.15 | ~0.93 |
| 4" | ~2.54 | ~22.86 | ~1.23 |
| 6" | ~3.81 | ~34.30 | ~1.85 |
Density of 145 lb/ft³ matches the NAPA published average. The FHWA uses the same value in federal pavement specifications. Cold patch and recycled asphalt typically run 125—35 lb/ft³ —adjust the density slider above if you're working with those mixes.
How do I convert square yards to tons of asphalt?
Square yards are the most common unit on commercial bid sheets, while tons are how suppliers price the load. The chain is: SY →SF →CF →lb →tons.
Worked example for a 200 sq yd parking lot at 4 inch depth:
- SF = 200 × 9 = 1,800 sq ft
- CF = 1,800 × (4 ÷ 12) = 600 ft³
- lb = 600 × 145 = 87,000 lb
- Tons = 87,000 ÷ 2,000 = 43.5 short tons
- With 7% waste: 43.5 × 1.07 = ~46.5 tons ordered
Why does density matter more than people think?
Density swings from 140 to 150 lb/ft³ across mixes —that's a 7% range. On a 50-ton order, the wrong density estimate can mean 3.5 tons of unexpected overage or shortfall. Always:
- Ask your supplier for the actual mix density on their batch ticket
- Re-run the calc with the supplier value if it differs from the 145 default
- Keep waste at 5% for new pours, 7-10% for irregular patches and parking lots
The questions below cover the conversion edge cases that come up on real job sites.
What do people ask about asphalt tonnage?
How many tons of asphalt do I need per square foot?
At 3" depth and 145 lb/ft³ density, plan for about 0.0181 tons per square foot. So 1,000 sq ft of 3" driveway needs roughly 18 tons before waste, or 19 tons with the standard 5% waste factor included.
How do I convert square yards to tons?
Multiply sq yd by 9 to get sq ft, then by depth in feet (inches ÷ 12), then by 145 lb/ft³ ÷ 2,000. A 100 sq yd lot at 4 inches needs about 21.75 tons before waste.
How many tons are in a cubic yard of asphalt?
1 cubic yard of compacted asphalt at 145 lb/ft³ weighs about 1.95 short tons. Loose pre-compaction volume is 15 to 20 percent higher, which is why suppliers price by weight rather than volume.
What's the asphalt tonnage formula?
Tons = (Length × Width × Depth in ft) × Density (lb/ft³) ÷ 2,000 × (1 + Waste%). Use 145 lb/ft³ for HMA and add 5—0% waste for compaction loss.
Does the calculator support metric tonnes?
Yes. Switch to Metric (m / cm) at the top of the calculator and the output flips to metric tonnes (1,000 kg) instead of short tons (2,000 lb). Density is still 145 lb/ft³ converted to roughly 2,323 kg/m³.