Bitumen & Asphalt Unit Converter
Convert the length, weight, and density units you’ll run into across bitumen and asphalt calculations, all in one tool.
Unit Converter
Bitumen and asphalt calculations pull from multiple measurement systems at once — metric and imperial length units, metric tonnes and US tons for weight, and kg/m³ versus lb/ft³ for density. This tool covers the conversions that come up most often across our other calculators and guides.
Length conversions
| From | To | Multiply By |
|---|---|---|
| Feet | Meters | 0.3048 |
| Meters | Feet | 3.28084 |
| Inches | Millimeters | 25.4 |
| Millimeters | Inches | 0.03937 |
Weight conversions
| From | To | Multiply By |
|---|---|---|
| Kilograms | Pounds | 2.20462 |
| Pounds | Kilograms | 0.453592 |
| Metric tonnes | US tons (short) | 1.10231 |
| US tons (short) | Metric tonnes | 0.90718 |
Density conversions
| From | To | Multiply By |
|---|---|---|
| kg/m³ | lb/ft³ | 0.062428 |
| lb/ft³ | kg/m³ | 16.0185 |
| kg/m³ | g/cm³ | 0.001 |
Metric tonnes and US tons are not interchangeable
This is one of the most common unit mix-ups in bitumen work: 1 metric tonne ≈ 1.102 US (short) tons. Confusing the two on a large order creates a real, meaningful quantity error — always confirm which ton your supplier quote and delivery documents refer to.
Why unit mix-ups matter more than they seem
A single missed or incorrect unit conversion — forgetting to convert millimeters to meters, or mixing up metric and US tons — is one of the most common sources of real-world estimating errors in bitumen and asphalt work, often larger in impact than any density or bitumen content assumption. Double-checking unit conversions independently, especially on large orders, is cheap insurance against an expensive mistake.
Area and volume conversions
| From | To | Multiply By |
|---|---|---|
| Square feet | Square meters | 0.092903 |
| Square meters | Square feet | 10.7639 |
| Cubic meters | Cubic yards | 1.30795 |
| Cubic yards | Cubic meters | 0.764555 |
Common conversion mistakes in bitumen work
- Converting thickness from millimeters to meters by dividing by 100 instead of 1,000 — always double-check the number of zeros
- Assuming 1 litre of bitumen weighs exactly 1 kg, when it’s actually closer to 1.0–1.05 kg depending on grade and temperature
- Using a US (short) ton figure where a metric tonne was specified, or vice versa, without converting — a roughly 10% discrepancy that’s easy to miss on a quick read
- Mixing density units mid-calculation — for example, entering a lb/ft³ value into a field expecting kg/m³ without converting first
Cross-checking a converted figure with a second method — a rough mental estimate, or running the same conversion through this tool a second time with the units reversed — is a fast way to catch a unit error before it becomes an ordering mistake.
A quick sanity-check habit worth building
Before finalizing any order based on a converted figure, ask whether the resulting number is roughly the right order of magnitude for the job in front of you — a driveway that "needs" 5,000 tonnes of asphalt, or a tack coat that "needs" 50,000 litres for a small patch, is an obvious sign a unit got mixed up somewhere upstream. This kind of rough magnitude check catches the majority of real-world conversion errors faster than re-deriving the math from scratch.
Apply these conversions in a full quantity calculation