Raised Garden Bed Soil Calculator
Cubic feet and bags of soil for a raised garden bed.
Enter your values
Enter the bed length in ft.
Enter the bed width in ft.
Enter the soil depth in in.
Enter the bag size in cu ft.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Soil needed
- 32 cu ft
- Bags needed
- 22
- Cubic yards (for bulk order)
- 1.19 cu yd
Quick answer
Soil volume needed is bed length times width times depth, converted to bags based on bag size.
cu ft = length x width x depth; bags = cu ft / bag size
At a glance
| What it does | Cubic feet and bags of soil for a raised garden bed. |
|---|---|
| Category | Home & DIY |
| Inputs needed | Bed length, Bed width, Soil depth, Bag size |
| Main output | Soil needed |
| Formula | cu ft = length x width x depth; bags = cu ft / bag size |
| Cost | Free — no sign-up, no download |
How to use the Raised Garden Bed Soil Calculator
- 1Measure the length and width of your raised bed and the fill depth you want.
- 2Check the cubic feet listed on your soil bag of choice.
- 3Buy bagged soil for small beds or order bulk soil by the cubic yard for larger beds.
Inputs explained
- Bed length(ft)
- Enter the bed length in ft.
- Bed width(ft)
- Enter the bed width in ft.
- Soil depth(in)
- Enter the soil depth in in.
- Bag size(cu ft)
- Enter the bag size in cu ft.
Worked example
Using the values the calculator loads with:
Inputs
- Bed length8 ft
- Bed width4 ft
- Soil depth12 in
- Bag size1.5 cu ft
Results
- Soil needed32 cu ft
- Bags needed22
- Cubic yards (for bulk order)1.19 cu yd
Frequently asked questions
How deep should a raised bed be?
Most vegetables do well with 10-12 inches of soil depth; root crops may benefit from 12-18 inches.
Should I mix in compost?
Yes, a common mix is 60% topsoil, 30% compost and 10% aeration material like perlite for good drainage.
What do I need to enter into the Raised Garden Bed Soil Calculator?
Just 4 values: bed length, bed width, soil depth, bag size. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Raised Garden Bed Soil Calculator work out the answer?
Soil volume needed is bed length times width times depth, converted to bags based on bag size. It applies the formula cu ft = length x width x depth; bags = cu ft / bag size and shows the working so you can check each step by hand.
Is the Raised Garden Bed Soil Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.