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Asphalt Quantity Calculator

Area × thickness × density gives tonnage, then bitumen content.

Quick answer

With the default inputs: Pavement area 10000 m² · Compacted thickness 0.05 m · Mix bulk density 2.4 t/m³ etc.Bitumen required 58.29 t

Edit the inputs below to recalculate.

Inputs

Length LDepth HWidth W
Area × compacted depth × bulk density gives mix tonnage; bitumen is then split off by the ratio to aggregate.
m²
m
40-60 mm for fine-graded, 50-70 for medium
t/m³
AC mixes 2.35-2.45, SMA 2.4-2.5
%
Bitumen ÷ aggregate, not bitumen content — the denominators differ
%
Edge trimming and transport loss, usually 1-4%

Result

Bitumen required
58.29t
Pavement area10000m²
Compacted thickness50mm
Net mix weight1200.0t
Mix with waste1224.0t
Bitumen58.29t
Aggregate1165.7t
Bitumen content of mix4.76%
Bitumen per m²5.83kg/m²
Mix per m²0.122t/m²
30 t truck loads41loads

Bitumen ratio and bitumen content are different numbers and this is where asphalt take-offs most often go wrong. Ratio = bitumen ÷ aggregate (denominator excludes bitumen); content = bitumen ÷ total mix. A 5% ratio equals 4.76% content — a 0.24 point difference worth tens of tonnes on a big job. Designs quote ratio, test reports quote content; never substitute one for the other. Use bulk density, not maximum theoretical: about 2.40 for AC-13 and 2.42 for AC-20. Thickness is compacted; loose depth needs a 1.15-1.25 factor.

Formula

Net mix weightM = area × thickness × density
With wasteM = M × (1 + waste)
BitumenG = M × ratio ÷ (100 + ratio)
AggregateG = M − bitumen
Bitumen contentcontent = bitumen ÷ M × 100%
10000 m² at 50 mm compacted, 2.4 t/m³, 5% bitumen ratio and 2% waste: 1200.0 t net mix, 1224.0 t with waste, 58.29 t of bitumen, 1165.71 t of aggregate, 4.76% content and 5.83 kg of bitumen per square metre.

FAQ

What exactly differs between ratio and content?
The denominator. Ratio = bitumen ÷ aggregate, excluding bitumen; content = bitumen ÷ total mix, including it. So the ratio number is always larger. 5% ratio equals 4.76% content; 6% equals 5.66%. Mix designs quote ratio because plants add bitumen to aggregate; extraction tests report content because that is what they measure. Always convert when comparing, or the lot fails.
Why bulk density rather than maximum theoretical?
Because you are weighing the material that actually goes on the road — compacted, with voids. Bulk density accounts for those voids, about 2.40 t/m³ for AC-13. Maximum theoretical density assumes zero voids, around 2.50, and would overstate the tonnage by roughly 4%. It is used only to derive air voids (VV), never for weight.
How is the loose-depth factor used?
Loose depth = compacted depth × 1.15-1.25. The paver sets screed height to the loose depth and rollers bring it down to design thickness. The factor depends on mix and compaction: coarser mixes and SMA take the higher value, fine-graded the lower, and under-rolling pushes it higher. Note that material quantities use compacted thickness — using loose depth would overstate the tonnage by 15-25%.

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Results are estimating aids only and are not a design basis. Construction and final accounts must follow the drawings, the applicable standards and an approved method statement. Anything affecting structural safety, shoring or falsework must be checked by a suitably qualified engineer.