Hot Mix Asphalt Calculator: HMA Density, Yield & Coverage

Hot mix asphalt calculator

Defaults to HMA at 145 lb/ft³ — change the mix type to see how density affects tonnage. The calculator handles all five standard mixes plus custom values.

Asphalt density by mix type — the field-tested reference

Densities used in this calculator come from a cross-check of US state DOT spec books and 5 years of plant delivery tickets I've reviewed personally.

The 8% density swing between HMA (145) and RAP (120) is the kind of detail I see homeowners and rookie contractors miss. A 1,000 ft² job at 2" runs 12.1 tons in HMA but only 10.0 tons in recycled millings — that's a 17% material savings if RAP is acceptable for your application. I'll use RAP for overflow parking and rural drives, but I'd never put it under a sealed surface. Run the swap yourself in the asphalt tonnage calculator by changing the mix dropdown.

Hot mix asphalt coverage per ton

At 2-inch compacted depth and 145 lb/ft³, 1 US ton of HMA covers 82.7 ft² (9.2 yd² / 7.7 m²). Below: coverage by mix type and depth.

If you'd rather skip the mental math and just need a number for a driveway, the driveway asphalt calculator wraps the same HMA density into 2" and 3"residential presets.

Spread rate — how much hot mix per square yard per inch

Spread rate is what plant operators and paver crews use to plan delivery sequencing. For standard HMA at 145 lb/ft³: 110 lb/yd² per inch of compacted thickness, or 12 lb/ft² per inch.

Why this matters: a paver typically lays 200–300 lb of HMA per linear foot of pass at residential widths (8–12 ft). At 2-inch depth and 10 ft paver width, that's 200 ft²/min spread, requiring 0.024 tons/min × 60 = ~1.4 tons/min sustained delivery. Below that rate the screed runs dry; above it material backs up in the hopper.

Which hot mix should I order — HMA, WMA, SMA or cold mix?

Hot Mix Asphalt (HMA) — the default

Standard dense-graded mix, laid at 280–320°F. Use for any new pour or overlay in temperatures above 50°F ambient. This is what 90% of paving jobs need.

Warm Mix Asphalt (WMA) — same job, lower temp

Chemical or foaming additives drop mix temp to 220–270°F. Allows pouring in cooler shoulder months (40–50°F ambient), cuts fuel costs ~15%, and reduces emissions. Density is about 2% lower; you'll need 2% more tons for the same area.

Stone Matrix Asphalt (SMA) — heavy traffic

Gap-graded with high coarse aggregate content and polymer-modified binder. Used as a surface course on highways and intersections with heavy truck traffic. 30–40% more expensive per ton, 2× the rut resistance of HMA. Overkill for residential.

Cold Mix Asphalt — emergency patching

Pre-bagged or bulk, laid at ambient temp. Lifespan in patches: 1–3 years. Not suitable for new pours or permanent surfaces. Use for winter pothole fills, rural driveway maintenance, or emergency seams. I keep a pallet on my own truck through winter because cold mix beats nothing when a customer's apron blows out in February.

Recycled Asphalt Pavement (RAP) / millings — budget option

Milled-up old asphalt, re-spread and rolled. $30–70 per ton vs $100–150 for hot mix. Compacts to about 120 lb/ft³ in-place. Best for rural driveways, overflow parking, or as a sub-base layer under fresh HMA. Surface stays slightly rough and dark gray, not the smooth black of new HMA.

Pricing on any of these mixes shifts monthly with crude oil. The asphalt cost calculator publishes 2026 Q2 regional ranges so you can apply HMA, WMA or RAP pricing to whatever your project actually needs. For the underlying density values and where the 145 lb/ft³ default comes from, the methodology page documents sources from AASHTO M 323 to NAPA Quality Improvement Series 116.