Ten tons at a 3 in residential lift
Coverage at 3 in compacted: 551.72 sq ft
- Volume: 10 tons × 2,000 ÷ 145 lb/ft³ = 137.93 ft³
- Thickness: 3 in ÷ 12 = 0.25 ft
- Coverage: 137.93 ft³ ÷ 0.25 ft = 551.72 sq ft
Asphalt Coverage Calculator — Sq Ft per Ton
Coverage answers one question: what does this tonnage pave? Enter tons and pick a compacted thickness; the calculator returns covered area in square feet and yards, coverage per ton, and a live ladder that updates with your density — unlike static coverage charts fixed at one value.
The Formula
Coverage sq ft = (Tons × 2,000 ÷ Density lb/ft³) ÷ (Thickness in ÷ 12)
How the Calculation Runs
- Convert tons to pounds, then to compacted cubic feet using density.
- Divide by thickness in feet to get covered area.
- Repeat across the thickness ladder (1–4 in) with your current density and tonnage.
What Each Variable Means
| Symbol | Variable | Unit | Notes |
|---|---|---|---|
| W | Asphalt weight | US tons | Available tonnage — delivered, quoted, or on hand. |
| T | Compacted thickness | in | Finished thickness after rolling. |
| D | Density | lb/ft³ | Compacted mix density; the ladder recalculates when you change it. |
| C | Coverage | sq ft | Net paved area. |
Entering Your Numbers
- Asphalt (US tons)
- Compacted thickness
- Density (lb/ft³) — Typical hot mix runs 142–148 lb/ft³. Use your supplier’s mix-design value when you have it.
Known Limitations
- Static coverage charts (the “1 ton covers X sq ft” tables elsewhere) freeze one density; ours recalculates, but both are only as accurate as the density you enter.
- Real yield loses a few percent to edges, joints, and handwork. For ordering, use coverage plus allowance, not coverage alone.
- Ladder thicknesses are common paving lifts (1–4 in). Base courses and full-depth reconstruction belong in the base calculator.
Worked Examples
Every number below is produced by the same engine at build time — not typed by hand.
A 1.5 in overlay with 22 tons
Coverage at 1.5 in compacted: 2,427.59 sq ft
- Volume: 22 tons × 2,000 ÷ 145 lb/ft³ = 303.45 ft³
- Thickness: 1.5 in ÷ 12 = 0.125 ft
- Coverage: 303.45 ft³ ÷ 0.125 ft = 2,427.59 sq ft
Frequently Asked Questions
What is the coverage of 1 ton of asphalt?
At 145 lb/ft³: roughly 55 sq ft at 3 in, 83 sq ft at 2 in, 110 sq ft at 1.5 in, 41 sq ft at 4 in. The ladder above recalculates all of it for your tonnage and density.
How much asphalt do I need for 100 square feet?
About 1.8 net tons at 3 in (100 sq ft × 0.25 ft × 145 lb/ft³ ÷ 2,000), or roughly 1.9 tons ordered with 5% allowance. For any area, the square-feet-to-tons converter does this with truckloads and cost.
Why does coverage change with density?
A ton is a fixed weight; denser mix packs more weight into less volume, so the same ton spreads over fewer square feet at a given thickness. Across 142–148 lb/ft³, coverage shifts about 4%.
Is coverage the same for driveways and parking lots?
The math is identical — only the thickness spec changes. Driveways commonly compact to 3–4 in; parking-lot overlays often run 1.5–2 in over sound existing pavement.
Sources & Data Lineage
- FHWA Western Federal Lands Estimating Handbook — hot-mix asphalt density basis for the 145 lb/ft³ planning default. Reviewed 2026-09.
- Asphalt Institute — typical HMA density range 142–148 lb/ft³. Reviewed 2026-09. www.asphaltinstitute.org