Garden Soil Mix Calculator
Calculate garden-bed soil volume and split the order into topsoil, compost and aeration components using adjustable mix shares.
Default project preview
1.96 yd³
Topsoil
0.98 yd³
Compost
0.59 yd³
Aeration material
0.39 yd³
Base volume
1.78 yd³
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Bed volume = length × width × depth × settlement factor. Each component volume equals total order volume × its share ÷ the sum of all entered shares.
FAQ
Garden Soil Mix Calculator questions
Do the mix shares need to total 100?+
No. The calculator treats them as relative parts and normalizes them automatically.
Why add a settlement allowance?+
Loose soil and compost settle after filling and watering, so an allowance can help maintain the planned finished depth.
Is one mix suitable for every plant?+
No. Drainage, nutrient needs, native soil and crop type should guide the final recipe.