Calculate asphalt tonnage from square yards area and compacted thickness. Common for US parking lots, driveways, and roadway projects.
1 square yard = 9 sq ft = 0.836 m². Square yards are commonly used in US DOT specifications and contractor bids.
1 ton of HMA covers approximately 9–13 sq yd at 2 in thick (standard HMA density ~145 lb/ft³).
Commonly used for US parking lots, driveways, and commercial paving bids where area is quoted in square yards.
Enter dimensions to calculate
At standard HMA density 145 lb/ft³ (2320 kg/m³). Short tons shown. Add 5–10% for wastage.
| Thickness | Short Tons / 100 sq yd | Metric Tonnes / 100 sq yd | Typical Use |
|---|---|---|---|
| 1.5 in (38 mm) | 7.3 | 6.6 | Thin overlay |
| 2 in (50 mm) | 9.7 | 8.8 | Residential driveways, parking lots |
| 2.5 in (64 mm) | 12.1 | 11.0 | Commercial parking lots |
| 3 in (75 mm) | 14.6 | 13.2 | Collector roads / heavy commercial |
Square yards are the standard area unit in US highway contracts. This calculator converts SY and thickness directly to short tons, matching how FHWA and state DOT bid documents express quantities.
Measure length and width in feet, then divide by 9 to get sq yd (since 1 sq yd = 9 sq ft). Example: A 300 ft × 24 ft road section = 7,200 sq ft ÷ 9 = 800 SY. Or measure directly in yards: 100 yd × 8 yd = 800 SY.
The industry shortcut for dense-graded HMA is 110 lb per SY per inch of compacted thickness. For 2-inch surface: 800 SY × 2 in × 110 = 176,000 lb ÷ 2,000 = 88 short tons. Add 5% waste = order approximately 92 tons for this road section.
The 110 lb/SY/in rule is based on 145 lb/ft³ density × (1 ft²/9 ft² per SY) × (1/12 ft per in) = 108.75 ≈ 110. For denser mixes (SMA at ~150 lb/ft³) or lighter mixes (OGFC at ~120 lb/ft³), adjust the density input in the calculator. For full binder/aggregate breakdown, use the Asphalt Tonnage Calculator.
1 sq yd = 9 sq ft = 0.836 m². For US DOT projects measured in SY, this calculator is the most direct tool. For residential projects measured in sq ft, use the Sq Ft to Tons Calculator. For international metric projects in m², use the Square Metres Calculator.
From highway resurfacing takeoffs to parking lot bids and local street overlays, square yards is the standard area unit in US road contracts — making this the go-to tool for DOT project estimating.
Civil estimators and contractors bidding on state highway resurfacing contracts must calculate asphalt tonnage from plan quantities expressed in square yards. This calculator converts the contract SY to tons needed for procurement, allowing cost-per-ton pricing to feed directly into bid unit prices for the Schedule of Prices. Pay items on most US DOT contracts are in SY or tons — this tool bridges both.
Related: Asphalt Tonnage Calculator
Commercial property managers and paving contractors estimate parking lot asphalt in square yards when working from site plans. A 300-space commercial parking lot at 3 acres = approximately 14,500 SY. At 2.5-inch asphalt: 14,500 × 2.5 × 110 ÷ 2,000 = 1,994 tons. Add tack coat between base and surface layers using the Tack Coat Calculator.
Related: Asphalt Cost Calculator
Municipal DPW engineers and subdivision developers calculate annual overlay programmes using SY area takeoffs from GIS or pavement management systems. Programme quantities in SY translate to ton orders across multiple streets, allowing plant scheduling and cost budgeting. Payment to contractors is typically per ton placed and compacted, verified against certified plant delivery tickets.
Related: Road Asphalt Calculator
More tools for your asphalt estimation needs.
Measure the length and width of your paving area in yards and multiply them together. If you have measurements in feet, divide each by 3 to convert to yards first, then multiply. Many highway and parking lot projects in the US still express quantities in square yards (SY).
Enter the required compacted asphalt depth in inches. For reference, AASHTO pavement design guidelines suggest 2 inches minimum for residential and 4+ inches for arterial roads. The standard density of 145 lb/ft³ (approximately 3,915 lb/yd³) works for most dense-graded HMA; adjust for specialty mixes.
The calculator converts square yards and thickness to US short tons. FHWA and state DOT bid documents often specify quantities in SY, so this tool bridges the gap between area takeoffs and material orders. Round up to the nearest half-ton and always add 5% waste allowance before calling your plant.
At a 2-inch compacted thickness and standard density (145 lb/ft³), one US ton covers roughly 9–10 square yards. At 3 inches that drops to about 6–7 SY per ton. Rule-of-thumb tables used on job sites often quote 110 lb/SY per inch of compacted thickness, so a 2-inch layer weighs approximately 220 lb/SY, or about 0.11 tons/SY.
Square yards have been the conventional unit for pavement area measurement in American highway engineering since the early 20th century, largely inherited from road surface treatment practices. AASHTO, FHWA, and most state DOT standard specifications still express pavement quantities in SY. This calculator lets you work in those same units to match bid takeoffs without manual conversion.
One square yard equals 9 square feet or 0.836 square metres. To convert SY to SF, multiply by 9. To convert SY to m², multiply by 0.836. If you prefer to calculate in square feet or square metres, use our dedicated square feet or square metres calculators, which use the same underlying formula with their respective unit defaults.
Yes — the calculator uses US short tons (2,000 lb) by default, which is standard for asphalt procurement in the United States. A long ton (2,240 lb, used in the UK) is about 12% heavier than a short ton, and a metric tonne (2,205 lb) is about 10% heavier. If your supplier quotes in metric tonnes, multiply the short ton result by 0.907 to convert.
At standard HMA density (145 lb/ft³) and 2-inch compacted thickness, 1,000 SY requires approximately 110 short tons using the 110 lb/SY/inch rule: 1,000 × 2 × 110 ÷ 2,000 = 110 tons. At 2.5 inches the same 1,000 SY needs about 137.5 tons, and at 3 inches about 165 tons. Always add 5–10% overage to your order. Use the Asphalt Tonnage Calculator for a full breakdown including binder and aggregate quantities.
In US DOT specifications, overlay types differ primarily by thickness: a Type I thin overlay is typically 1–1.5 inches (approximately 55–82 tons per 1,000 SY), a Type II standard overlay is 1.5–2 inches (82–110 tons per 1,000 SY), and a Type III structural overlay is 2–3+ inches (110–165+ tons per 1,000 SY). The appropriate overlay type is determined by the existing pavement condition, traffic loading (ESAL), and design life requirements. Enter each lift separately into this calculator if you're paving multiple courses with different mix types or thicknesses.
This calculator handles asphalt tonnage only. For tack coat (bond coat) quantities between asphalt lifts, use the dedicated Tack Coat Calculator, which calculates gallons of emulsified asphalt required per square yard based on application rate. Standard tack coat application rates are 0.03–0.10 gal/SY of residual asphalt, depending on the existing surface condition and mix type being placed. Tack coat is required on all existing pavement surfaces and between lifts in multi-layer paving.