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Topsoil bag coverage: How much do you need?


Frequently-asked topsoil questions posed by new and experienced gardeners alike!

Getting value for money from your topsoil means understanding how much you need for a particular project. If you’re considering getting a topsoil bag for your garden, remember to plan your project before you buy, and consider the area, depth and density of topsoil you need.


How much topsoil do I need for my garden?

Using our topsoil calculator tool you can quickly & easily determine the measurements needed and the right amount for your budget. By providing the information you need, including the number of our bulk bags you need to fulfil your task, our guide helps makes buying the correct amount easy.



How much is a yard of topsoil?

1 square yard of our popular multipurpose topsoil, measured to the standard 35cm depth favoured by many gardeners for everyday root veg crops like potatoes and carrots, would require 450kg of topsoil. Our 1 tonne bags provide twice this, and are safe to store if ventilated and able to naturally dry. This means for one £70.80 bag you get 2 years’ supply!



How do I calculate how much gravel I need?

Our topsoil calculator doesn’t just have to be used for topsoil! Many gardening projects require a measuring tool to establish the volume of materials needed- gravel, sand and wood chippings among them. 10mm gravel for driveways should be measured to 5cm depth, while for other areas 3-4cm should be sufficient. For 20mm gravel 4-5cm would be better, with 6cm for drives. By working to these depths and measuring the area you intend to cover, our calculator can reliably calculate the precise volume of gravel which you need.



How many cubic yards of topsoil do I need?

Most topsoil calculators, including ours, accept measurements in metres, yards or feet. Measure your borders or allotment accordingly to find two planes- if it’s a difficult shape break up the dimensions into smaller shapes to find the total area you’re seeking to cover.



How much does a cubic meter of soil weigh?

The weight of soil can vary enormously based on the volume of water it contains. One cubic metre of moderately damp soil (as freshly dug) soil weighs 1.4- 1.7 tonnes when dug, depending on how tightly packed it is.



How many cubic feet are in a ton of soil?

1 tonne of packed topsoil measures roughly 24.7 cubic feet- that’s just under 3 feet along each plane- much heavier than it looks!


Got any more questions about topsoil? Contact our team to learn more about how topsoil can help your garden prosper.






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