How it works
This tool treats the paved area as a simple rectangular prism. It calculates the raw volume from your dimensions, adds a safety percentage (waste), and converts the result into standard ordering units like cubic yards.
- Input Dimensions: Length, Width, and Thickness.
- Calculate Volume: Length × Width × Thickness = Raw Volume.
- Add Waste: Multiply by (1 + Waste Percentage).
- Convert: To cubic yards (dividing cubic feet by 27).
Formulas
Volume_yd³ = (Length_ft × Width_ft × Thickness_ft) ÷ 27
For weight estimation:Weight = Volume × Density
Example Calculation
Scenario: 50ft driveway, 10ft wide, 2 inch overlay.
- Thickness in ft: 2 ÷ 12 = 0.167 ft
- Volume (ft³): 50 × 10 × 0.167 = 83.33 ft³
- Add 7% waste: 83.33 × 1.07 = 89.16 ft³
- Volume (yd³): 89.16 ÷ 27 = 3.30 cubic yards
Frequently Asked Questions
What unit should I use to order asphalt in the US?+
Most suppliers handle tons (weight), but planning often starts with cubic yards (volume). This tool calculates both if you provide a density.
Why add a waste percentage?+
Waste accounts for compaction loss, uneven subgrades, and minor measurement errors. 5-10% is a standard safety factor.
How accurate is the weight estimate?+
It's an approximation. Real weight depends on the specific asphalt mix density and degree of compaction. Always verify with your supplier.
Can I use this for metric projects?+
Yes. Toggle the calculator to 'Metric' to input meters/cm and get results in cubic meters and tonnes.
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