Topsoil Calculator
Work out the exact amount of topsoil required for your garden project, from lawns to raised beds. Get volume in cubic metres, weight in tonnes, and the number of bags needed.
Enter Your Dimensions
You can either enter the length and width of the area, or enter the total square metres directly.
Your Results
Total Volume
1.50 m³
Total Weight
1.95 tonnes
Bags Required
3
850kg Bulk Bags
79
25kg Small Bags
Understanding Your Topsoil Needs
New Lawns
For laying new turf, a depth of 150mm is recommended to give the grass roots a healthy start.
Raised Beds
For flowers and most vegetables, a depth of 300mm provides ample room for root growth and nutrient uptake.
Vegetable Patches
Deeper rooting vegetables like carrots and potatoes will thrive with a soil depth of at least 450mm.
What is Topsoil?
Topsoil is the uppermost layer of soil, usually between 5 to 10 inches deep. It has the highest concentration of organic matter and microorganisms, making it the most fertile part of the soil. This is why it is essential for growing healthy plants, lawns, and vegetables.
When you are starting a new garden, creating a lawn, or filling a raised bed, using a quality topsoil provides the best possible start. It differs from the subsoil beneath it, which is lower in nutrients and more compacted. Our calculator helps you buy the right amount, avoiding waste and ensuring your project is a success from the ground up. For decorative stones, you might want to check our gravel calculator.
Frequently Asked Questions
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