FREE ONLINE TOOL

Professional Bitumen & Asphalt
Calculator

Instantly estimate bitumen, asphalt, or macadam quantities for driveways, roads, parking lots, and more. Precise. Fast. Free.

Project Parameters
Unit System
Road Dimensions
m
m
mm
Mix Properties
%
kg/m³
$

Ready to Calculate

Enter your road or pavement dimensions to instantly see the required bitumen and asphalt quantities.

Total Mix Required
0.00 tonnes
Bitumen Weight
0.00 tonnes
Aggregate Weight
0.00 tonnes
Surface Area
0.00 m²
Total Volume
0.00 m³
Estimated Total Cost
$0.00
How It Works
Get accurate estimates in five simple steps using industry-standard engineering formulas.
1

Select Unit

Choose Metric or Imperial

2

Enter Size

Input length, width & depth

More Calculator  Square Feet to Linear Feet Calculator
3

Pick Mix

Select DGA, SMA, etc.

4

Add Cost

Optional price per tonne

5

Get Results

Instant precise quantities

fx Formulas Used

  • Area =Length × Width
  • Volume =Area × Thickness
  • Mix Weight =Volume × Density
  • Bitumen =Mix Wt × (Bitumen% ÷ 100)
  • Aggregates =Mix Wt − Bitumen Wt

Unit Precision

Metric: lengths in meters (m), thickness in millimeters (mm), density in kg/m³. Weights output in metric tonnes (1,000 kg).

Imperial: feet (ft), inches (in), lb/ft³. Outputs in square feet, cubic yards, and short tons (2,000 lbs). All math uses high-precision metric conversion internally.

What Is Bitumen?

Bitumen (also called asphalt binder) is a sticky, black, viscous material derived from crude oil. It acts as the glue that binds aggregate particles together in road construction. Bitumen makes up roughly 4–7% of a typical asphalt mix by weight, yet it determines the pavement’s flexibility, durability, and resistance to weather.

Common Asphalt Mix Types

Dense Graded (DGA)

Density2,350 kg/m³
Bitumen5.5%
General roads, driveways

Stone Mastic (SMA)

Density2,400 kg/m³
Bitumen6.5%
High-traffic highways

Open Graded (OGA)

Density2,100 kg/m³
Bitumen4.5%
Drainage surfaces

Asphalt Concrete AC 14

Density2,300 kg/m³
Bitumen5.0%
Urban roads

Superpave SP 12.5

Density2,350 kg/m³
Bitumen5.5%
Climate-adaptive roads

Cold Mix Asphalt

Density2,200 kg/m³
Bitumen4.0%
Patching, temp repairs

High-Stress / Heavy Duty

Density2,450 kg/m³
Bitumen6.0%
Industrial, heavy vehicles
Frequently Asked Questions
Common questions about bitumen, asphalt, and how to use this calculator.
This calculator provides estimates based on industry-standard density values and mix compositions. Actual quantities may vary by ±5% depending on compaction rate, material grade, and site conditions. Always add a 5–10% wastage buffer for real projects.
Most standard asphalt mixes contain 4.5% to 6.5% bitumen by weight. Dense Graded Asphalt (DGA), the most common road surface, typically uses around 5.5%. High-performance mixes like Stone Mastic Asphalt (SMA) use up to 6.5% for better durability.
Bitumen is the binder — the black, sticky oil-derived material. Asphalt (or bituminous concrete) is the final product: a mix of bitumen + aggregate (crushed stone, gravel, sand). In everyday usage, people often use the terms interchangeably.
Thickness depends on intended use:
  • Footpaths / cycle lanes: 25–40 mm
  • Driveways (residential): 40–60 mm
  • Roads (light traffic): 60–100 mm
  • Highways / heavy traffic: 100–200 mm+
Always consult a structural engineer for load-bearing applications.
Standard dense-graded asphalt has a compacted density of approximately 2,300–2,400 kg/m³ (144–150 lb/ft³). The calculator defaults to 2,350 kg/m³ for DGA, the most common value used in civil engineering.
Yes. A typical residential driveway uses Dense Graded Asphalt (DGA) at 40–60 mm thickness. Enter your driveway dimensions, keep the DGA preset, set thickness to 50 mm, and the calculator instantly shows how much bitumen and asphalt mix you need.
Yes, always. Real-world paving loses material to edges, spillage, and compaction variation. Add 5–10% to the total mix weight result. For irregular shapes, add up to 15%.
1 metric tonne = 1.10231 short tons. The calculator handles this automatically when you switch to Imperial units — simply toggle the unit system at the top of the calculator panel.

The professional standard for asphalt and bitumen quantity estimation. Designed for civil engineers, contractors, and builders.

Disclaimer

Results are estimates only and should not be used as the sole basis for purchasing decisions. Consult a qualified civil engineer for structural construction projects.

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