About DIYSums

DIYSums helps people plan common building, repair and garden jobs. Its calculators turn measurements you provide into estimated material quantities, such as whole bags, rolls, sheets, panels or lengths.

DIYSums team: We build free calculators that turn a DIY project into an exact shopping list. Quantities come from published product sizes and official guidance, so you buy the right amount first time.

The site is organised around the country where the work is happening. Where a tool is available, it uses that region’s units, terminology, product examples and published rules. A product example is there to make the estimate concrete, it is not an endorsement or a claim that the product is the only suitable choice.

Use the result as a starting point for planning and shopping. Check the assumptions and cited sources, measure your own project carefully, and confirm product suitability with the manufacturer or supplier before ordering or building.