



 
Hi Blanche, The best way might be to weigh a bag on your bathroom scale. If you want a calculation I can help somewhat. Not all topsoil weighs the same so that's the difficulty I have. I found a table that gives the density in pounds per cubic foot (lb. per cf)for various materials. Look in the table under Earth for various kinds of topsoil. I then used Google to convert 22 liters to cubic feet. I typed 22 litres in cubic feet into Google and got the response 22 litres = 0.776922668 cubic feet. So choose the line in the table you think best fits your topsoil and multiply the density in pounds per cubic foot by 0.78. I hope this helps,  


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