How to use this calculator
- Enter Parking stalls.
- Enter Area per stall in sq ft.
- Enter Thickness in in — or tap a preset badge to auto-fill a typical value.
- Enter Price per ton in $.
- Press Calculate. The highlighted row is your order quantity; the note beneath it translates the number into real-world terms.
Formula & constants
A standard 9 × 18 ft stall plus aisle share is roughly 300 sq ft per car. At 3 in compacted hot mix, each stall consumes about 5.4 tons; multiply stalls × 300 for lot area. Every default in the fields above is editable — when your supplier’s spec sheet lists a different density, coverage rate or price, enter that number instead. The waste and compaction allowances follow common trade practice; see our methodology page for the derivation of each formula and the standards it references.
Where this fits in the project
Paving is sequential: the site is excavated to design depth, a gravel base course is placed and compacted, hot mix is laid and rolled, and the cured surface is protected with sealcoat every 2–3 years. Run this calculator after base quantities are settled so the lift thickness sits on a stable, drained foundation.
How this connects to your project
No quantity stands alone — each material in the chain depends on the ones around it. These are the planning steps that pair with the parking lot paving calculator:
- Asphalt Calculator — Parking lots use asphalt as the primary paving material.
- Asphalt Cost Calculator — Commercial quantities affect per-ton asphalt pricing.
- Pavement Calculator — Parking lots require engineered pavement design.
- Sealcoating Calculator — Commercial lots need regular sealcoating and striping.
- Crack Filler Calculator — Lot maintenance includes crack sealing.
- Driveway Cost Estimator — Similar to driveway estimation but at commercial scale.
- Excavation Calculator — Site preparation includes excavation and grading.
- Gravel Calculator — Base course requires significant gravel quantities.
- Sub-base Calculator — Commercial lots need engineered sub-base for heavy loads.
- Tack Coat Calculator — Tack coat ensures adhesion in multi-layer commercial paving.
Frequently asked questions
How many square feet per parking stall?
About 300 sq ft including aisle share — the stall itself is 162 sq ft (9×18), the rest is circulation.
What thickness for a commercial lot?
3 in over 6–8 in base for cars; 4–6 in in truck lanes and dumpster pads, which carry concentrated loads.
Last verified: — prices reflect current national averages. See our methodology.
Estimates are for planning. Material densities, coverage rates and prices vary by region and supplier — confirm final quantities before ordering, and check local code where structural or electrical work is involved.