Soil Calculator for Raised Beds
Fill a raised bed with confidence: enter its length, width, and height and we'll calculate the soil volume.
Shape
Units
Area: 0.0 sq ft
Planning more than one thing? Open the Yard Planner → to trace your whole yard over an aerial photo and total every material at once.
How to measure for topsoil
- Measure the length and width of your area in feet.
- Multiply them for square feet (or just enter length and width above).
- Choose a depth — we default to 4 inches for topsoil.
- Read your total in cubic yards, or the number of bags.
Soil for Raised Beds coverage at a glance (4" deep)
| Area (sq ft) | Cubic yards | Bags |
|---|---|---|
| 100 | 1.4 | 49 |
| 200 | 2.7 | 98 |
| 300 | 4.1 | 147 |
| 500 | 6.8 | 245 |
| 1,000 | 13.6 | 489 |
Includes a 10% overage allowance. Estimates are low-fi — confirm with your supplier.
Frequently asked questions
How much soil do I need to fill a 4x8 raised bed?
A 4×8 bed that's 12 inches deep holds 32 cubic feet — about 1.2 cubic yards. Enter your bed's exact size above.
What mix should I use in a raised bed?
A common blend is roughly 60% topsoil, 30% compost, and 10% aeration (e.g. perlite). Calculate each layer separately above.