🪴 Raised Bed Soil Mix Calculator

Calculate the right soil mix for your raised beds — topsoil, compost, perlite, and amendments by volume.

Project Details

Number of Beds (beds)

Bed Length (feet)

Bed Width (feet)

Bed Height (inches)

Mix Type (1=basic, 2=premium)

1 = topsoil+compost, 2 = coco coir+vermiculite+compost

Your Estimate

Enter your details and hit Calculate to see results.

More Tools You Might Need

Coco Coir Bricks

Lightweight, holds moisture, perfect for raised beds

Retains water and nutrients in the mix

Improves drainage and aeration

Organic Fertilizer

Feed your plants through the season

Mix amendments into existing soil

Know what your soil needs before amending

Pro Tips

✓ The classic Mel's Mix: 1/3 peat or coco coir, 1/3 vermiculite, 1/3 compost
✓ Coco coir is more sustainable than peat moss and holds water better
✓ Top up beds with 1-2 inches of compost each spring — soil compresses over time
✓ Don't use native yard soil in raised beds — it compacts and drains poorly

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