Potting Soil Calculator

Calculate the exact amount of potting soil needed for containers, raised beds, pots, and planters with support for rectangular, round, and flower pot shapes.

feet
feet
inches
inches
inches
inches

Recommended: 2-4 inches for shallow roots, 18-24 inches for deep roots

Results

Soil Needed

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Cubic Yards

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Quarts

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Liters

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Frequently Asked Questions

How much soil do I need for my container?

The amount of soil depends on your container's shape and size. Use our calculator to input your container dimensions and get the exact volume needed in cubic feet, yards, and quarts.

How deep should soil be in a raised bed?

For shallow-rooted plants, 12-18 inches is sufficient. Medium-rooted plants need 18-24 inches, while deep-rooted vegetables require 24-36+ inches of soil depth.

What's the difference between raised bed soil and potting soil?

Raised bed soil is heavier and designed for larger outdoor containers, while potting soil is lighter with better drainage for indoor pots and smaller containers.

How do I calculate soil for a round pot?

For round pots, measure the diameter and depth. The calculator uses the formula: Volume = π × (diameter/2)² × depth to determine the soil volume needed.

Can I reuse old potting soil?

Yes, old potting soil can be refreshed by mixing in compost, new potting mix, or fertilizer. Remove any dead roots and debris before reusing.

How much does a cubic yard of soil weigh?

A cubic yard of potting soil typically weighs 500-800 pounds, depending on moisture content and soil composition. Dry soil is lighter than wet soil.

What should I put at the bottom of a raised bed?

You can place cardboard or landscape fabric to suppress weeds, followed by coarse materials like branches or logs (hugelkultur method) to improve drainage and soil structure.

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