Raised Bed Soil Calculator

Work out exactly how much soil or compost you need to fill a raised bed, planter, or container — in the bags your local supplier actually sells. Enter your bed’s dimensions below, switch to your region, and get an instant shopping list.

Soil & Compost Planner

Raised Bed Soil Calculator

Enter your bed size and we’ll work out exactly how much soil to buy — in the bags your local supplier actually sells.

Region

Measure in

Length Width

Diameter

Depth of soil to fill Tip: most vegetables want 30cm (12″) of depth. Root crops like carrots prefer 45cm+.

I’m filling more than one identical bed

How many beds?

Bag size sold near you

Advanced options

Settling / top-up allowance Loose compost settles after watering. A small buffer means you won’t come up short.

30 cm

Live fill preview

— litres

— bags needed

A planning guide, not a final quote. These figures are based on typical bag volumes and soil densities, which vary by brand, moisture, and region. Please cross-check the amount against your own measurements and your supplier’s actual bag sizes before ordering — and round up rather than down.

Bag volumes and settling vary by supplier. Always confirm quantities locally before you buy.

How to use this calculator

Measure the inside length, width, and depth of your bed, choose your region so the bag sizes match your supplier, and read off the litres and number of bags. The tool adds a small settling allowance so you won’t come up short. For deeper beds, you can fill the base with cheaper bulk material and set the depth to just your compost layer.

New to raised beds? Start with our guides on how much soil you need and how deep a raised bed should be.