About GravelCalculator.ca
GravelCalculator.ca provides free, easy-to-use calculators that help homeowners, landscapers and contractors in Canada estimate how much gravel, stone, sand, soil, aggregate and concrete a project needs — and what it will cost.
What we do
Our goal is to make material estimating simple and accurate. Each calculator turns a few measurements — area, depth, or tank/slab dimensions — into the figures you actually order by: cubic yards, cubic metres, tonnes, bags and cost in Canadian dollars. Every tool works in both metric and imperial units and runs entirely in your browser, so your inputs are never sent to a server.
How our estimates are calculated
Volume is found by multiplying area by depth (or with the correct geometric formula for circles and columns). Weight is then calculated using the material's bulk density:
Volume = Area × Depth
Weight (tonnes) = Volume (m³) × Density (t/m³)
We use widely accepted bulk densities for each material, for example:
| Material | Density (t/m³) |
|---|---|
| Loose dry gravel | 1.52 |
| Pea gravel | 1.79 |
| Crushed stone / crusher run | 1.60 |
| River rock | 1.44 |
| Sand (dry) | 1.60 |
| Topsoil | 1.30 |
| Concrete (ready-mix) | 2.40 |
Because real-world materials vary with particle size, moisture and compaction, we recommend ordering about 5–10% extra and confirming quantities with your supplier.
Why trust these calculators
The formulas are standard volume-and-density calculations used across the construction and landscaping industries. We show the math and the densities openly so you can check the result, and we keep the tools free and ad-supported rather than hidden behind a paywall.
Our calculators
Browse the full set on the all calculators page, including the gravel calculator, cubic yard calculator, concrete calculator, topsoil calculator and more.
Contact
Questions, corrections or suggestions? Visit our contact page — we welcome feedback that makes the tools more accurate.