Whether you’re planning a new garden project, refreshing borders, creating pathways or laying a new lawn, it’s important to order the right amount of material. Our Bulk Bag Calculator helps you work out exactly how many bags you’ll need based on the size and depth of your project.

Simply select a product from the dropdown menu, enter the length, width and depth of the area you want to cover, and the calculator will estimate the number of bulk bags required. All calculations are based on typical bulk densities and bag volumes for each material, giving you a reliable guide when planning your order.

If you're unsure which product is best for your project or need help choosing the right depth, our team is always happy to help.

Bulk Bag Calculator

Choose a product, enter area & depth, and we’ll calculate bags.

Select Product Bark Compost Soil Lawn Top Dressing Sand — Pathway Materials — Self-Binding Gravel Slate Planings Cockleshells — Aggregates — Shingle Crushed Concrete Ballast Type 1

Length (m)

Width (m)

Depth (mm)

Surface area:–m²

Total volume:–m³

Bulk bags required:–bags

Calculations are approximate and based on typical bulk densities for each material. Actual bag requirements may vary slightly.