Garden Bed Area Calculator

Summary

Enter your garden bed shape and dimensions to instantly calculate area and how much soil, mulch, or compost you need at any depth.

How it works

1. Select a bed shape: rectangular, circular, or triangular.
2. Enter the bed dimensions in feet or meters (length/width, radius, or base/height).
3. Enter the desired fill depth in inches or centimeters.
4. The calculator computes the surface area and multiplies by depth for total volume.
5. Results show cubic feet, cubic yards, and the number of standard 1-cubic-foot and 2-cubic-foot bags.

Use cases

• Plan how much topsoil to buy when building a new raised bed.
• Estimate compost needed to top-dress an existing garden bed.
• Calculate mulch volume for a circular or triangular planting area.
• Compare fill costs between bulk delivery and bagged material.
• Verify a delivery order before purchasing soil in bulk.
• Size a new circular bed around a tree or focal point.

Frequently Asked Questions