California Asphalt Calculator
Bitumen and aggregate estimation using Caltrans specifications and Superpave mix design standards with USD currency and hot-dry climate defaults.
Active Mathematical Formula
The calculator uses the following formula to determine asphalt volume and material quantities.
Estimation Results
Calculated material quantities based on your inputs.
BETTER
ROADS
(Length × Width)
(L × W × T)
(Assuming 5.5%)
(Assuming 5.5% binder)
Caltrans specifications, CT 375, CT 366, and AASHTO M 323 Superpave for asphalt concrete mix design.
Hot dry summers and mild winters in the Central Valley; mountain regions require cold-temp bitumen grades (PG 64-10 to PG 76-16).
Asphalt in California typically runs $140–$320/tonne depending on region and project size.
California Mix Standards
Typical values for common California Caltrans / Superpave pavement mix designs.
| Mix Type | Bitumen Content (%) | Density (kg/m³) | Standard |
|---|---|---|---|
| SP 12.5 Superpave | 5.0–6.5 | 2290–2370 | Caltrans CT 375 |
| SP 9.5 Fine-Graded | 5.5–7.0 | 2280–2360 | Caltrans |
| RHMA-G (Open-Graded) | 5.5–7.5 | 1900–2050 | Caltrans (noise-reducing) |
| SMA (Stone Mastic) | 6.0–7.5 | 2240–2340 | High-traffic |
| WMA (Warm Mix) | 5.0–6.0 | 2290–2370 | All regions |
Why the mix you pick changes the tonnage
Caltrans lets you specify three quite different surfacing materials for the same job. They do not weigh the same, and the calculator needs to know which one you mean.
| Mix | Typical compacted density | Binder content | Tonnes for 1,000 m² at 50 mm |
|---|---|---|---|
| Dense-graded HMA | 2,300–2,400 kg/m³ | 4.5–6.0% | ~117 t |
| RHMA-G (gap-graded rubberised) | 2,250–2,350 kg/m³ | 7.0–8.5% | ~115 t |
| OGFC (open-graded friction course) | 2,000–2,150 kg/m³ | 6.0–7.0% | ~104 t |
The dense-to-open gap is around 11%. Estimate an OGFC lift at dense-mix density and you order about 13 tonnes you do not need on a job this size. Going the other way is worse: you run short mid-mat.
The binder column matters separately. RHMA-G carries noticeably more binder than dense-graded, and binder is the expensive constituent, so two mixes with almost identical tonnage can price quite differently.
Estimating Asphalt for Caltrans and Local California Projects
California asphalt work is unusually diverse: scorching Central Valley summers, cool coastal fog, and Sierra freeze-thaw all pull mix design in different directions. Caltrans leans heavily on Superpave hot-mix, rubberized asphalt (RHMA-G) made with recycled tire crumb, and open-graded friction courses (OGFC) that improve wet-weather traction on high-speed routes. Whether you're bidding a Caltrans job or paving a Los Angeles parking lot, your tonnage estimate has to account for which of these mixes the specification calls for.
The thing that catches people out here is density. RHMA-G and OGFC are lighter per cubic metre than standard dense-graded HMA, so estimating a rubberised overlay at dense-mix density will have you over-ordering by several percent. Pick the mix first, then enter dimensions.
Output is tonnage, the binder and aggregate split, and cost in USD. Caltrans binder grades run from PG 64-10 across the hot interior to PG 70-10 on heavy-truck corridors. Check the grade and the density on your mix design before anything gets ordered.
California Asphalt Tonnage Formula
California projects typically use imperial dimensions (feet, inches) but Caltrans specifications quote tonnage in US short tons. This calculator handles both unit systems.
Caltrans Driveway Example
A 20 ft × 50 ft driveway (1,000 sq ft) at 2-inch Type A HMA, density 147 lb/ft³: 1,000 × (2 ÷ 12) × 147 ÷ 2,000 = 12.25 short tons. Add 10% waste → order 13.5 tons. At $140/ton = $1,890 material cost.
Caltrans Highway Lane
A 1-mile state highway lane (5,280 ft × 12 ft = 63,360 sq ft) at 3-inch Type A overlay, 147 lb/ft³: 63,360 × 0.25 × 147 ÷ 2,000 = 1,163 short tons per lane-mile. Caltrans cost estimates for contractor-placed Type A overlay typically run $90–$150 per ton installed.
Convert to Metric Tonnes
To convert short tons to metric tonnes: multiply by 0.9072. 1,163 short tons × 0.9072 = 1,055 metric tonnes. The Tonnage Calculator gives full metric results if you prefer to work in metres and kg/m³ for international project comparisons.
California's extreme summer heat — up to 48°C in the Central Valley and desert regions — demands stiff bitumen binders to prevent rutting. Caltrans mandates PG 64-16 minimum for most regions and PG 76-16 for the hot desert zones. The rubberized RHMA-G mix (required on many state routes under the California Tire Recycling Act) uses crumb rubber modifier in the binder for enhanced flexibility and reduced noise. Check the Temperature Converter for binder viscosity at different application temperatures.
California Asphalt Paving Projects
From state highway resurfacing to residential driveways, California is one of the largest asphalt paving markets in the world.
Caltrans State Highway Resurfacing
California's state highway system spans over 50,000 lane-miles and requires continuous resurfacing. Caltrans' annual paving programme replaces hundreds of miles of pavement each year with Type A HMA or RHMA-G surface course. Standard Caltrans Type A overlay thickness on urban highways is 2–3 inches; on rural routes 3–4 inches. Use this calculator to estimate tonnage for Caltrans bid preparation — then cross-check with the Cost Calculator for project budget estimates.
Local Streets & Residential Paving
California municipalities and county road departments maintain thousands of miles of local roads. A typical slurry seal plus overlay programme on a residential street (24 ft wide, 1,000 ft long) requires a 2-inch Type A overlay of approximately 88 short tons. California's hot climate means asphalt has a shorter service life than colder states — resurfacing cycles of 10–15 years are common in Southern California's high-UV zones. The Square Feet Calculator is ideal for local street bid calculations.
Commercial & Industrial Paving
California leads the nation in commercial construction, generating large demand for parking lot and industrial yard paving. A 50,000 sq ft retail parking lot at 3 inches HMA over 6-inch aggregate base requires approximately 918 short tons of surface HMA. San Francisco, Los Angeles, and San Diego metro areas have some of the highest paving contractor rates in the US — accurate tonnage estimates are critical for competitive bidding. The Repair Calculator handles California parking lot patching programmes.
Frequently Asked Questions
What asphalt mix does Caltrans specify for California highways?
Caltrans uses Superpave mix design methodology under their Standard Specifications. Type A Hot Mix Asphalt is the primary surface course mix, while Type B is used for base and intermediate courses. Rubberized Hot Mix Asphalt (RHMA-G) is required on many state highways under California's tire recycling mandate, incorporating crumb rubber from recycled tires.
How much does asphalt paving cost in California?
California asphalt paving costs approximately $3–$7 per square foot for residential driveways (2-inch overlay) and $1.50–$3.50 per square foot for commercial parking lots. Material cost alone is typically $80–$180 per ton. Large commercial or highway projects can negotiate lower rates. Bay Area and Los Angeles projects are generally more expensive than Central Valley or inland areas due to labor costs.
What PG binder grade is used in California's hot climate?
Most of California's low-elevation areas require PG 64-16 or PG 70-10 performance grade bitumen. The San Joaquin Valley and desert regions like Palm Springs and the Coachella Valley require stiffer PG 76-16 to resist rutting in extreme summer heat. Mountain and northern California areas may use PG 58-28 or softer grades for cold-weather flexibility.
What is RHMA-G and why does California require it?
RHMA-G (Rubberized Hot Mix Asphalt — Gap Graded) is a Caltrans-specified surface course mix that incorporates crumb rubber from recycled automobile tires (typically 18–22% of binder weight). California's Tire Recycling Act requires its use on many state highway projects to consume millions of waste tires annually. RHMA-G provides better noise reduction, improved flexibility, and enhanced fatigue resistance compared to standard HMA. The gap-graded aggregate structure and high rubber content (6.5–8% total binder) result in a slightly lower density (1,950–2,100 kg/m³) — use the "OGFC" mix preset in this calculator as the closest equivalent.
How many tons of asphalt per lane-mile in California?
A standard 12-foot Caltrans lane at 3-inch Type A HMA (density 147 lb/ft³): 5,280 ft × 12 ft × (3 ÷ 12) ft × 147 lb/ft³ ÷ 2,000 = 1,745 short tons per lane-mile. At 2 inches, it's approximately 1,163 short tons per lane-mile. For a 4-lane divided highway (8 lanes × both carriageways), multiply accordingly. Caltrans uses a standard bid item unit of "tons" (short tons) on state contracts — ensure you're pricing in short tons, not metric tonnes, when preparing Caltrans bids.
What are California asphalt prices by region in 2025–2026?
California asphalt prices vary significantly by region (2025–2026 estimates): Los Angeles / Orange County: $130–$180/ton for Type A HMA supply. San Francisco Bay Area: $150–$200/ton (higher due to labor costs). Central Valley (Fresno, Bakersfield): $100–$150/ton. San Diego: $130–$175/ton. Rural/Northern California: $120–$160/ton. RHMA-G and polymer-modified mixes add a 15–25% premium. California prices typically peak in spring/summer paving season and dip in winter. Check current Caltrans published average bid prices or contact local plant suppliers (Vulcan Materials, Martin Marietta, Granite Construction, CEMEX) for current quotes.
Specifications behind these numbers
Mix designations, binder grades and densities on this page trace back to the state specification and to the Asphalt Institute. Your district may amend any of it, and your approved Job Mix Formula overrides all of it.
- Caltrans, Standard Specifications (2025) — Section 39, Hot Mix Asphalt
- Caltrans, Construction Manual — Section 4-39, Asphalt Concrete
- Asphalt Institute, MS-2 Asphalt Mix Design Methods, 7th edition
- ASTM D2041/D2041M-19 — Theoretical Maximum Specific Gravity and Density of Asphalt Mixtures (the Rice test)
Mix tables checked against the specifications above in July 2026. Any cost figures quoted are indicative only and date quickly — treat them as a sanity check on a quote, never as a quote. See our editorial policy for how these values are sourced and reviewed, and the disclaimer for the limits of these estimates.
How to Use This Calculator
Enter Project Dimensions
Input the length, width, and compacted asphalt thickness. For California Caltrans projects, standard wearing course thickness (Type A HMA) is typically 2 to 4 inches (50–100 mm). Driveways and parking lots often use 2 inches of surface course over a 4-inch base.
Select Caltrans Mix Type
Choose the appropriate Caltrans Superpave mix — Type A (surface), Type B (base), or RHMA-G (rubberized). California's hot-dry climate requires stiffer PG binder grades (PG 64-16 to PG 76-16) to resist rutting in high summer temperatures. Adjust bitumen content per your job mix formula.
Add USD Price & Calculate
Enter the current California asphalt price per ton in USD (typically $80–$180 per ton for standard mixes). Click Calculate to get total tonnage, bitumen and aggregate quantities, and estimated project cost. Add 10–15% waste factor for irregular areas.