Bitumen Weight Calculator
Get bitumen and total mix weight in kilograms or tonnes — the figure you need for weighbridge tickets, delivery orders, and invoicing.
Bitumen Weight Calculator
Dimensions
Mix Properties
Typical Bitumen Content by Mix Type
| Mix Type | Bitumen |
|---|---|
| General Asphalt | 5.0% - 5.5% |
| High Traffic Roads | 6.0% - 7.0% |
| Rigid Pavements | 4.0% - 4.5% |
| Binder Courses | 4.5% - 5.5% |
| Wearing Courses | 5.5% - 6.5% |
| Stone Mastic Asphalt | 6.5% - 7.5% |
Weight is the unit bitumen and asphalt are actually bought, sold, and delivered in — not volume. This calculator is framed around getting you an accurate weight figure in kilograms or tonnes, which is what you’ll need to compare against a weighbridge ticket, a supplier invoice, or a delivery docket.
Why weight and volume tell you different things
Volume (m³) describes physical space; weight (kg or tonnes) describes mass. The two are linked by density, which is why this calculator asks for a density value before it can convert your project’s dimensions into a weight figure. Get the density wrong and the weight figure will be proportionally wrong — see our bitumen density guide if you’re unsure which value to use. This distinction matters most when someone hands you a volume figure (from a spec or a rough site estimate) and you need to convert it into a weight for ordering, invoicing, or comparing against a weighbridge ticket.
Weight from volume
Weight (kg) = Volume (m³) × Density (kg/m³)
This applies to the total mix weight. Multiply by bitumen content % separately to get bitumen-only weight.
Converting between kg and tonnes
| Weight | In kg | In tonnes | In US tons |
|---|---|---|---|
| 1 tonne | 1,000 kg | 1 | 1.102 |
| 10 tonnes | 10,000 kg | 10 | 11.02 |
| 50 tonnes | 50,000 kg | 50 | 55.1 |
| 100 tonnes | 100,000 kg | 100 | 110.2 |
Metric tonnes and US tons are not the same
1 metric tonne = 1,000 kg = approximately 2,204.6 lb, while 1 US (short) ton = 2,000 lb ≈ 907.2 kg. Confirm which unit your supplier quote and delivery docket are using before comparing figures — this mismatch is a common source of apparent discrepancies that are actually just a unit conversion issue.
Checking a delivery weighbridge ticket against your estimate
Your calculated weight from this tool is a theoretical figure based on geometry and specified density. A weighbridge ticket reflects the actual weighed mass of a specific truckload. Small differences (a few percent) between the two are normal and expected due to density variation, moisture, and load variation. A large discrepancy (10%+ ) is worth investigating — check that the density and thickness values used in your calculation match what was actually delivered.
Why some specifications use kg/m² instead of a percentage
Most mix-based specifications express bitumen content as a percentage of total mix weight, but some project specifications — particularly for spray-applied work like tack, prime, and seal coats — express the requirement directly as a weight per unit area (kg/m² or L/m²) instead. These are two different but related ways of specifying the same underlying quantity: a percentage describes the binder’s share of a mix, while a per-area rate describes an applied quantity directly, without needing a separate volume calculation step. If your spec gives you a per-area rate, use our tack coat, prime coat, or seal coat calculators, which are built specifically around that format.
Convert between litres and tonnes for spray-applied bitumen