Raised bed planning tool
Raised Bed Soil Calculator
Estimate soil volume before you buy a metal raised bed, elevated planter, or vegetable garden kit. The biggest surprise in raised bed shopping is often not the bed itself, but how much fill it takes.
Estimated soil volume
45.3 cubic feetThat is about 1.68 cubic yards, or roughly 1284 liters of total fill.
Balanced vegetable bed
Good default for most backyard vegetable gardens.
- Bottom bulk layer
- 15.9 cu ft
- Compost layer
- 9.1 cu ft
- Top growing mix
- 20.4 cu ft
A strong all-around depth for backyard vegetables and modular metal beds.
Buying decision
Use soil volume as a purchase filter, not an afterthought.
A 17-inch modular metal bed is often the practical value pick because it gives meaningful vegetable depth without creating a huge fill bill. A 26- or 32-inch bed can be easier on your back and better for deep roots, but the extra height changes the real setup cost.
Best Soil for Raised Beds
Compare bagged raised-bed mixes, compost, coco coir, and bulk-soil tradeoffs.
Buying guideBest Metal Raised Garden Beds
Compare bed height, coating, modular layout, and fill-cost tradeoffs.
Setup guideWhat to Put at the Bottom
Choose bottom layers without blocking drainage or wasting quality mix.
Comfort guideBest Raised Beds for Seniors
Balance working height, reach, soil volume, and assembly risk.
Raised Bed Soil Calculator FAQ
How do I calculate soil for a raised garden bed?
Multiply the bed length by the bed width by the bed height. Convert height from inches to feet first, then the result is cubic feet of total fill.
Do I need to fill the entire raised bed with bagged soil?
Not always. Deep beds can use clean bottom bulk material, compost, and a top growing mix, as long as the root zone remains high quality.
How deep should soil be for vegetables in a raised bed?
Many vegetables do well with 12 to 18 inches of usable soil. Deep-rooted crops and comfort-height beds may benefit from more depth, but fill cost rises quickly.
Why do taller metal raised beds cost more to fill?
Soil volume increases directly with bed height. A 32-inch bed can need almost twice the fill of a similar 17-inch bed, so soil planning matters before purchase.