PiechartGarden Soil Calculator

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When creating a new garden bed or a raised bed garden it can be daunting to know how much garden soil you need. It can also be hard to convert between cubic feet and cubic yards when looking to buy it. Our garden and top soil calculator will help you take the guesswork out of the process.

Simply put in the length of your garden sides in feet and inches, and then the desired depth of garden soil you are looking for. We will then calculate how much top soil you will need, as well as recommend two garden soil mixes.

What shape of Garden do you have?

Circle Garden Feet Inches
Diameter Your Garden
Depth of Your Garden


Top Soil Needed

The simplest way to fill your garden is to use regular top soil or dirt. Depending on the soil in your area, this can provide a good base from which to start. We do recommend adding some peat moss and compost to help loosen and enrich the soil and you should focus on improving the soil fertility over the next few years.

Unit Top Soil
Cubic Feet 0.00
Cubic Yards 0.00


Recommended Garden Soil Mix

This recommended garden soil mix will provide instant fertility to your garden. This garden soil is made up of compost, peat moss and vermiculite. The peat moss and vermiculite help to loosen and aerate the soil while the compost provides nutrients for the plants.

Many places recommend a garden soil mix of equal parts compost, peat moss and vermiculite. The numbers below represent a fill of 1/3 compost, 1/3 peat moss, 1/3 vermiculite. This should result in some of the most fertile gardening soil you can make.

Unit Compost Peat Moss Vermiculite
Cubic Feet 0.00 0.00 0.00
Cubic Yards 0.00 0.00 0.00


Less-Expensive Garden Soil Mix

As vermiculite can be rather expensive, especially in large quantities, a lot of people will leave it out and use normal top soil in their garden soil mix instead. That results in a soil mix with 1/3 top soil, 1/3 peat, 1/3 compost mix.

This garden soil mix will not initially be as fertile as the recommended garden soil mix but it will be much better than just using top soil. This is what many people use for their raised bed garden soil due to its nice balance between cost and fertility.

Unit Top Soil Peat Moss Compost
Cubic Feet 0.00 0.00 0.00
Cubic Yards 0.00 0.00 0.00





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