How Much Asphalt for a 40 Space Parking Lot?
Parking lots are usually planned at around 300 to 350 square feet per stall once aisles are counted. A 40-space lot is about 13,000 square feet; how much asphalt for a 40 space parking lot at a 3-inch pavement is roughly 236 tons.
Asphalt tonnage calculator →Tons by thickness
| Asphalt thickness | Tons (at ~325 sq ft/space) |
|---|---|
| 2 in | 157 |
| 3 in | 236 |
| 4 in | 314 |
| 5 in | 393 |
Tons use about 145 lb per cubic foot of compacted hot mix. Use the asphalt calculator with your actual measured area for a firm number.
Related: How Much Asphalt for a 100 Space Parking Lot?
Layout changes the total
The 325 square feet per stall figure is a planning number. Ninety-degree parking with two-way aisles, ADA spaces, islands and driveways push it up. Measure the actual paved outline once a site plan exists. See parking spaces per acre.
Thickness and base
Car-only lots are often paved with 2 to 3 inches of asphalt over 6 to 8 inches of compacted aggregate base. Areas with trucks, buses or dumpsters need a thicker section. An engineer or local spec usually sets the design for commercial lots. The asphalt base calculator sizes the stone layer.
Related: How Much Asphalt for a 10 Space Parking Lot?
Finishing the lot
Lots need a cross slope, often around 1 to 2 percent, toward inlets or the edge. Plan striping, wheel stops and ADA spaces before paving so the layout works.
Permits and planning
Before finalizing tons, confirm parking requirements, accessible space counts and drainage rules with the local jurisdiction. Stormwater rules in particular can change the layout or require inlets and detention.
Getting an accurate area
Once you have a site plan, measure the paved outline rather than relying on a per-space estimate. Include the entrance apron, drive lanes, loading zones and any dumpster pad. Subtract islands and planting areas that will not be paved.
Waste and yield
Paving crews usually order a bit more than the calculated tons to cover uneven base, handwork around edges and the last partial load. A few percent extra is common. Compaction also matters: tons are based on compacted density, not loose mix in the truck.
Questions people ask
How many tons of asphalt for 40 parking spaces?
About 236 tons at 3 inches, assuming about 325 sq ft per space.
How many square feet is a 40-space parking lot?
Roughly 13,000 square feet including aisles.
How thick is parking lot asphalt?
Often 2 to 3 inches for car lots, more for heavy traffic, over a compacted stone base.
How many square feet per parking space?
About 300 to 350 square feet per stall including aisles.
Related guides
- Asphalt Parking Lot Cost: Build the Budget From Square Feet and Tons
- How Thick Is a Parking Lot Asphalt Overlay?
- Cross Slope for a Parking Lot
- How Many Parking Spaces Fit on an Acre of Asphalt?
- How Much Asphalt for a 25 Space Parking Lot?
- How Much Asphalt for a 30 Space Parking Lot?
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