Interactive raised bed calculator
Enter bed size. Get soil volume, bags, cost, and a shopping list.
Default example: one 4×8×12 in bed, 10% settling, and 2 ft³ bags. Results update automatically as inputs change.
More planners: mix, containers, spacing, top-off, depth, cost, multi-bed, shapes
Raised Bed Soil & Planting Calculator
4×8 Raised Bed 6 Inches Soil Calculator
Calculate soil volume and bags for a 4×8 raised bed filled 6 inches deep.
Preset: raised bed dimensions
Formula: 4 × 8 × 0.5 ft = 16 ft³
Worked example: A 4×8 bed at 6 inches deep needs 16 ft³ before settling.
Adjust the live inputs above before copying the shopping list, printing the result, or buying material.
4×8 bed at 6 inches
These rows use one 4×8 bed, 0 in freeboard, 10% settling allowance, and 2 ft³ bags. Change the live calculator for other assumptions.
| Depth | Before settling | With 10% | 2 ft³ bags | Planning note |
|---|---|---|---|---|
| 6 in | 16.00 ft³ | 17.60 ft³ / 0.65 yd³ | 9 | Shallow planning depth: better for greens, herbs, and short-root crops than for large fruiting crops. |
Quick copy: 6 in: 16 ft³ before settling; 17.6 ft³ with 10% settling; 0.65 yd³; about 9 × 2 ft³ bags.
What to verify
- Measuring outside dimensions instead of inside fill dimensions.
- Forgetting freeboard below the bed rim.
- Buying bags without checking the package volume.
Page-specific notes
- Useful for shallow greens and herbs, not deep-rooted crops.
Disclaimer
BedSoil results are planning estimates for buying and mixing soil. They are not agricultural, engineering, pest, disease, fertilizer, or crop-yield advice. Check product labels, local material quality, drainage, bed construction, climate, and crop variety before purchasing materials.