Asphalt Tonnage Calculator

Accurately calculate asphalt weight and volume for your paving projects

calculateProject Details

Give your project a name for reference
Select your preferred measurement system
Select thickness measurement unit
Typical range: 2320-2400 kg/m³. Adjust based on mix type.
Add any additional project information

analyticsCalculation Results

Area

0 m²

Volume

0 m³

Weight

0 kg

Tonnage

0 t

Parameter Value Unit Description

articleCalculation Methodology

This asphalt tonnage calculator uses standard industry formulas to estimate the amount of asphalt needed for your paving project. The calculation follows these steps:

  1. Area Calculation: Multiply the length by width to determine the surface area.
  2. Thickness Conversion: Convert thickness to meters (if needed) for volume calculation.
  3. Volume Calculation: Multiply the area by thickness to determine the volume in cubic meters.
  4. Weight Calculation: Multiply the volume by asphalt density to determine weight in kilograms.
  5. Tonnage Conversion: Convert kilograms to metric tonnes by dividing by 1000.

The default asphalt density used in calculations is 2350 kg/m³, which represents a typical value for hot mix asphalt. Actual density can vary between 2320-2400 kg/m³ depending on the mix design, aggregate type, and compaction method.

When the waste/contingency option is enabled, the calculator adds the specified percentage to the final tonnage to account for material loss during transport, placement, and compaction, as well as potential variations in substrate or thickness requirements.

All unit conversions follow standard conversion factors: 1 foot = 0.3048 meters, 1 inch = 25.4 millimeters.

helpFrequently Asked Questions

What density value should I use for my asphalt?

The default value of 2350 kg/m³ is appropriate for most hot mix asphalt applications. However, density can vary based on mix design. For precise calculations, consult your asphalt supplier for the specific density of the mix you'll be using.

Should I include a waste factor in my calculations?

Yes, we recommend including a waste factor of 5-10% to account for material loss during transport, placement, compaction, and potential variations in substrate or thickness requirements. The exact percentage depends on project complexity and site conditions.

How does compaction affect asphalt calculations?

Compaction reduces the volume of asphalt by removing air voids, typically by 5-10%. The density value used in calculations should represent the compacted density. If you're working with loose asphalt, you may need to increase the calculated quantity by 5-10% to account for compaction.

Can I use this calculator for different asphalt types?

Yes, but you should adjust the density value accordingly. Porous asphalt typically has a lower density (1800-2000 kg/m³), while stone mastic asphalt (SMA) may have a higher density (2400-2500 kg/m³). Always verify the specific density with your supplier.

How accurate are the unit conversions?

All unit conversions use standard conversion factors: 1 foot = 0.3048 meters, 1 inch = 25.4 millimeters. These are internationally recognized values that provide accurate conversions for construction calculations.

Why is my calculated tonnage different from my supplier's estimate?

Differences can occur due to variations in assumed density, compaction factors, waste allowances, or measurement discrepancies. Always confirm quantities with your supplier before placing an order.