Mass ÷ volume calculator
Asphalt Density Calculator
Enter a measured mass and corresponding volume to calculate asphalt unit weight, then compare the equivalent values across common imperial and metric density units.
Project inputs
Results update as you type
Estimated results
Calculated asphalt density
145 lb/ft³
Kilograms per cubic meter
2,322.68 kg/m³
US tons per cubic yard
1.9575 tons/yd³
Metric tonnes per cubic meter
2.3227 tonnes/m³
Mass and volume must describe the same sample in the same loose or compacted condition.
Formula
Unit conversions are completed before multiplication, then results are formatted only at display time to avoid cumulative rounding.
Example calculation
A compacted sample weighing 1,450 lb occupies 10 ft³.
Density is 145 lb/ft³, approximately 2,322.68 kg/m³, 1.96 US tons/yd³, or 2.32 tonnes/m³.
How to use this calculator
- 1Enter a mass measured for the asphalt sample or placed quantity.
- 2Enter the exact corresponding volume and select its unit.
- 3Keep material condition consistent—do not pair compacted mass with loose volume.
- 4Use the converted density in the quantity calculator that matches your project.
Typical density is a range, not a constant
Compacted hot-mix asphalt is often planned around roughly 135–150 lb/ft³ (about 2,160–2,400 kg/m³), while reclaimed millings and loose materials can be lower and more variable. These ranges are context, not a substitute for a mix design or field density result.
Aggregate mineralogy, gradation, binder content, air voids, temperature, moisture, and compaction effort influence unit weight. Use agency or project specifications for acceptance decisions.
Common density unit equivalents
One lb/ft³ equals about 16.0185 kg/m³. One US ton/yd³ equals about 1,186.55 kg/m³. One metric tonne/m³ equals exactly 1,000 kg/m³. The calculator converts through kg/m³ to avoid compounded rounding.
| Material/condition | Planning context |
|---|---|
| Compacted HMA | Often 135–150 lb/ft³; verify mix-specific target |
| Asphalt millings/RAP | Often lower and more variable; ask supplier |
| Loose hot mix | Do not apply compacted pavement density without confirmation |
Related calculators and guides
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Open CalculatorAsphalt Tonnage Calculator
Calculate asphalt tonnage from area, thickness and density. Supports feet, inches, yards, meters and centimeters with US tons and metric tonnes.
Open CalculatorAsphalt Cubic Yards to Tons
Convert asphalt cubic yards to US tons, metric tonnes, pounds and kilograms with an editable density and exact intermediate unit conversions.
Open CalculatorAsphalt Millings Calculator
Estimate recycled asphalt millings area, volume, tons and tonnes using project depth, editable RAP density and an optional compaction allowance.
Open GuideHow Much Does Asphalt Weigh?
See how much compacted asphalt weighs per cubic foot, cubic yard and square foot, with formulas, thickness examples and density assumptions.
Open GuideTons in a Cubic Yard of Asphalt
One cubic yard of compacted asphalt is about 1.96 US tons at 145 lb/ft³. See the formula, density table and correct yards-to-tons conversion.
OpenFrequently asked questions
What is the density of asphalt?
It depends on the mix and condition. Compacted HMA is often in a planning range near 135–150 lb/ft³, but a project-specific mix or test value is more reliable.
How do I calculate asphalt density?
Divide mass by the volume occupied by that same material in the same condition, then convert units if needed.
What is 145 lb/ft³ in kg/m³?
Approximately 2,322.68 kg/m³ using exact pound and cubic-foot conversions.
Is unit weight the same as density?
In everyday estimating the terms are often used interchangeably. Strictly, density is mass per volume while unit weight is weight force per volume.
Can density be used to convert yards to tons?
Yes. Multiply cubic yards by density expressed as US tons per cubic yard, making sure the density matches the material condition.
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