Type 1, concrete, asphalt and topsoil calculator
Work out volumes and tonnages for Type 1 sub-base, concrete, asphalt and topsoil, with a waste allowance and concrete truck loads.
Free, no sign-in. Nothing you type is stored or sent anywhere — it's all worked out in your browser.
Enter the dimensions and depth.
How this works
Volume = area × depth (or length × width × depth), with depth entered in millimetres. With waste = volume × (1 + waste %). Tonnes = volume with waste × density.
Default densities (tonnes per m³ — change them to match your supplier): Type 1 sub-base 2.1 · Concrete 2.4 · Asphalt 2.35 · Topsoil 1.5. Truck size defaults to 6 m³.
These are planning figures. Always check delivery tickets and your supplier's data.
FAQs
How many tonnes of Type 1 do I need per m³?
About 2.1 tonnes per m³ once compacted. Check your supplier's figure, and add a waste allowance.
How do I work out concrete truck loads?
Divide the volume (with waste) by the truck size and round up. A standard ready-mix truck carries about 6 m³; smaller loads can cost extra.
What waste allowance should I use?
Commonly 5–10% for aggregates and concrete, more on uneven formation. Use what your company normally allows.
Why is my topsoil tonnage different from the quarry's?
Topsoil density varies a lot with moisture and how loose it is. Change the density to match your supplier's figure.
Civvio works this out automatically from your contract and site records.
Upload the contract and keep your diary, and Civvio flags the dates, notices and money at risk on every job — for you to review before anything is sent.
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