composted soil

How Much Topsoil Do I Need?

Working out how much topsoil you need for a project is one of the most commonly asked questions by gardeners and landscapers looking to buy topsoil. If you mismeasure the area you need the topsoil for, it can lead to a great amount of waste of both topsoil and money! 

Below, we’ve created a topsoil calculator so that you can be sure you know exactly how much topsoil you need whether that be for raising flower beds or levelling an uneven lawn.

Once you’ve worked out how much topsoil you need in cubic metres, there are also some things you need to consider before placing an order.

How much topsoil do I need for my garden?

Topsoil has several uses within the garden, whether that be for creating or levelling lawns, raising flower beds or growing vegetables. Each of its different uses means a different amount of topsoil is required. 

At Alsoils+, we supply a range of nutrient-rich topsoils to both domestic and trade customers, and can also deliver to those on the South Coast of the UK.

Levelling lawns

If you’re looking to level a bumpy lawn, the general rule of thumb is to use between 2-3cm of topsoil – we’ve also created the ultimate guide to levelling a lawn.

Growing vegetables

As there are different types of vegetables (root, cruciferous, allium etc), they require different levels of topsoil

  • Root vegetables will require between 3-4cm of topsoil
  • Other types of vegetables that grow on top of the ground will require between 1-2cm of topsoil

General gardening

For most forms of gardening such as raising flower beds or planting, you should use between 1-2cm of topsoil.

How much will 1 tonne of topsoil cover?

Topsoils can vary in screening sizes, therefore some topsoils may be denser than others. Generally speaking, 1 tonne of topsoil will cover 0.63 cubic metres or 22 cubic feet or 0.81 cubic yards. 

Our bags of topsoil come in sizes of 0.75m³, meaning you’ll get just over a tonne of soil per bag!

If you’re struggling to measure the size of your plot in order to find out how much topsoil you need, breaking each section down into manageable chunks will help you get accurate measurements ensuring you don’t under/over order the amount you need.

For those who want a calculation or formula to follow rather using than our calculator, you can follow the steps below to find out how many cubic metres of topsoil you need.

  1. Measure the width of your plot (in metres)
  2. Measure the length of your plot (in metres)
  3. Measure the depth of your plot (in metres)
  4. Multiply the width by the length by the depth then divide by 100
  5. E.g. 10m x 20m x 2cm / 100 = 4m³

About the Author

alsoils tractor landscaping service


The Alsoils Team

For more than three decades, Alsoils has been a trusted name in delivering superior soil, compost products and offering landscaping services. Based in Hampshire, Alsoils caters to a diverse clientele, including both homeowners and businesses. Our team are experts in all things gardening, so you can be sure you get the very best advice for topsoil, compost, manure and so much more!

Based on 14 reviews
Mark Belshaw
Mark Belshaw
Ordered 2 bulk bags of manure on Wednesday, late afternoon and all was delivered by Friday lunch time. Great quality product and excellent delivery turnaround.
Charles Smith
Charles Smith
Excellent, from order to delivery. 10 tonnes of loose load top soil delivered within a few days. Best price and the 10mm screened soil is great quality. Thank you
Lesley Barry
Lesley Barry
Excellent product ordered 4 bags of top soil the driver was so accommodating as we have a very long driveway. The customer sevice was excellent. Thank you.
David Robberts
David Robberts
Excellent product at a sensible price from a local supplier. Staff are friendly and willing to help: I asked if just one bag of topsoil could be delivered quickly and it arrived next day! Great service.
Mark Hibberd
Mark Hibberd
Smooth execution of the transaction and delivery. Very helpful phone call and conversation. Ordered three bags of Border Blend topsoil. Paid by Paypal. They delivered, on the specified date, carefully, exactly where I wanted the bags placed. All in all, a very pleasing purchase. The topsoil was excellent and had been very carefully prepared. No lumps. Would definitely recommend and I will use again. Everyone I spoke to was nice and helpful.
David Stamp
David Stamp
Ordered topsoil on Tuesday came by Friday at the exact time quoted. Was WAY cheaper than anywhere else (by about £15 per bag) and was dropped off via a crane on back of the lorry, not by pallet which most of the other places use. Soil was fine and dry. Brilliant !