Free gardening calculators

Free calculators for container and balcony gardeners: potting mix, bags, weight and plant spacing. They run in your browser and send nothing anywhere.

Planter Soil and Weight Calculator Enter the size of a pot, grow bag or raised planter to see how much potting mix it holds, how many bags to buy, and a rough dry and wet weight.
Plant Spacing Calculator Enter the inside length and width of a planter and the spacing your seed packet or plant label gives, and see how many plants fit in a grid.