Estimates for planning and ordering. Every assumption can be changed.
Guides
Plain-English explanations to go with the calculators.
How to plan a concrete shed baseSize, depth, layers and a simple way to work out what to order.Gravel paths and drivewaysHow the layers fit together and how to work out what to order.Measuring a room for decoratingMeasure once, buy the right amount and avoid mismatched batches.
These are estimates for planning and ordering. Materials, bag sizes and densities vary by product, so always check the figures on the packaging or with your supplier before you order. For structural work, follow the advice of a qualified builder or engineer.