Raised Bed Calculator
Calculate how much soil, compost, and amendments you need to fill a raised garden bed of any size.
How It Works
Enter your raised bed dimensions. The calculator computes total fill volume and suggests a mix of 60% topsoil, 30% compost, and 10% perlite for optimal plant growth.
Formula
Fill Volume = Length x Width x Height (all in feet)
Frequently Asked Questions
What is the best soil mix for a raised bed?
A popular mix is 60% topsoil, 30% compost, and 10% perlite or coarse sand. This provides drainage, nutrients, and structure for most vegetables and flowers.
How deep should a raised bed be?
Most vegetables need at least 12 inches of soil depth. Root vegetables like carrots need 18 inches. Shallow-rooted herbs can thrive in 6 inches.