About AsphaltCalculatorPrice
An independent, free asphalt estimating resource. This page explains where our data comes from, how we verify it, how often we review it and what our calculators can and cannot tell you.
What this site is
AsphaltCalculatorPrice publishes free asphalt estimating calculators and the reference data behind them. The tools cover tonnage, weight, volume, coverage, density, compaction and installed cost for driveways, parking lots and roads, in imperial and metric units, across seven regional editions.
The site is independent. We do not sell asphalt, do not take paid placements from contractors, and do not run an affiliate programme. The calculators are free to use without registration.
Editorial and review process
Every technical page on this site follows the same process:
- Source the primary data. Density values come from NAPA and AASHTO material standards and from published state DOT mix design sheets. Pricing comes from the BLS Producer Price Index series, published DOT bid tabulations and regional contractor quotations.
- Cross-check across at least two independent sources before a figure is published. Where sources disagree, we publish the range rather than picking one.
- Verify every calculation against a worked example. Every constant on this site has been checked against the long-form arithmetic — including several widely circulated shortcut constants that turn out to be wrong.
- Review on a fixed cadence. Pricing pages are reviewed monthly. Technical pages are reviewed quarterly. The review date and next review date appear at the foot of every page.
- Correct promptly and visibly. If you find an error, tell us and we will fix it and note the change.
Calculation methodology
All tonnage calculations use the standard volumetric method:
Three choices distinguish our calculators from most:
- We do not hard-code 145 lb/ft³. Sixteen mix densities are selectable, because assuming dense-graded hot mix for porous asphalt is a 31% error.
- We calculate against compacted thickness and treat compaction loss as part of the waste buffer, which is how estimators actually work.
- We show the full installed cost, not just material, because material is only 35–45% of a residential paving invoice.
Data sources
- NAPA — National Asphalt Pavement Association
- AASHTO
- FHWA — Federal Highway Administration
- US Bureau of Labor Statistics — Producer Price Index
- US Energy Information Administration
- ASTM International
- Transportation Research Board
- MoRTH — Ministry of Road Transport & Highways, India
- Indian Roads Congress
- NHA — National Highway Authority, Pakistan
- NHAI — National Highways Authority of India
- IDRRIM — Institut des routes, des rues et des infrastructures
- Routes de France
- AFNOR — normes NF EN 13108
- Cerema
- EAPA — European Asphalt Pavement Association
- Mineral Products Association — Asphalt
- National Highways (UK)
- BSI — BS 594987
- Transportation Association of Canada
- Ministère des Transports du Québec
- US EPA — porous pavement
Limitations
These are planning estimates. They are not a substitute for a site survey, a structural pavement design, or a quotation from a licensed contractor. Specifically:
- Density values are nominal. Your local plant's mix design sheet is authoritative.
- Pricing is regional and indicative. Actual quotations depend on site access, timing, volume and local market conditions.
- Thickness guidance reflects general practice. Public and commercial work requires a structural design against measured subgrade properties and design traffic.
- Regulatory requirements — permits, ADA compliance, stormwater, fire access — vary by jurisdiction and must be confirmed locally.
Corrections and contact
Found an error, or want a calculator we do not have? Use the contact page. We read everything and reply to substantive technical corrections within two working days.