Hammer CalculatorCalculators / Landscaping / Raised Garden Bed Calculator
Raised Garden Bed Calculator
Calculate how much soil you need to fill your raised beds, compare bulk vs. bagged pricing, and get tips on layering to save soil and improve drainage.
Raised Garden Bed Calculator
Pricing (edit to match local rates)
Total Volume
1.30 cu yd
35.2 cu ft for 1 bed (incl. 10% waste)
Bags per Bed (2 cu ft)
18
36 bags if using 1 cu ft size
Best Price
$91.26
via Bulk (per cu yd)
| Purchase Option | Quantity | Est. Cost |
|---|---|---|
| Bulk (per cu yd)Best value | 1.30 cu yd | $91.26 |
| 1 cu ft Bags | 36 bags | $180.00 |
| 2 cu ft Bags | 18 bags | $144.00 |
Best value: Bulk (per cu yd) — $91.26For 1 bed (8' x 4' x 12" each, 1.3 cu yd total), buying raised bed mix in bulk is the most cost-effective. Contact your local landscape supply yard for delivery options.
Save soil with the lasagna / hugelkultur methodFor beds 12 inches or taller, you can fill the bottom third with branches, logs, cardboard, or straw. This reduces the amount of soil needed by up to 30%, improves drainage, and adds slow-release nutrients as the organic matter decomposes. Fill only the top 8–10 inches with quality soil or raised bed mix.
About raised bed mix (60/30/10)Raised bed mix is typically 60% topsoil, 30% compost, and 10% perlite or coarse vermiculite. This blend provides excellent drainage, nutrient retention, and root aeration. You can also make your own by purchasing the components separately, which may be cheaper for larger quantities.
This is an estimate only. Actual soil volumes can vary based on settling and compaction — most soils settle 10–15% after watering. Bag sizes and prices vary by brand and retailer. Always confirm pricing with your local supplier.