Topsoil Calculator: How Much Topsoil Do You Really Need?

Topsoil Calculator

How to Use the Calculator

Measure your space in feet (length × width), or enter total square footage. Then, enter the depth of topsoil you need—typically 6 inches for raised beds or new beds. Hit "Calculate" and the tool will tell you exactly how much soil to order, in both cubic feet and yards.

Topsoil Explained

Topsoil is the top 2 to 8 inches of soil where most plant roots grow. It’s rich in organic matter, nutrients, and microbes that support healthy plants. Topsoil provides the fertile base plants need to thrive for all sorts of yard and garden projects. Use it to:

• Fill a new raised bed or planter
• Top-dress your lawn or reseed bare spots
• Level low areas in your yard
• Spread fresh soil before laying sod
• Create new garden beds or flower borders

How Deep Should My Topsoil Be?

The depth of topsoil you need depends on the project:

• Raised beds: 6 to 12 inches is typical—go deeper for root crops like carrots and potatoes. Normally, we advise a new garden bed consists of 40% topsoil, 40% compost, and 20% sand. See our Garden Soil Calculator for Raised Beds and Containers.
• New garden beds: 6 inches is usually plenty when laid over existing soil.
• Lawn leveling or repair: 1 to 3 inches to smooth low spots or prep for seeding.
• Sod installation: 4 to 6 inches gives grass roots room to grow strong.

Tip: It’s better to err on the deeper side—especially if your native soil is rocky or compacted.