Garden Maths Calculators

Accurate measurements are the foundation of every successful garden project. Whether you are laying a new patio, building raised beds, or ordering bulk materials, getting the maths right saves both money and wasted trips to the garden centre. Our area calculator handles rectangular, circular, and triangular garden spaces in metric, while the volume calculator converts between cubic metres, litres, and the bulk bag sizes commonly sold at UK builders merchants.

UK gardens come in all shapes and sizes, from compact Victorian terraces averaging 40-50 square metres to generous suburban plots of 200 square metres or more. Many older gardens have curved borders, angled boundaries, and odd-shaped beds that make simple length-times-width calculations useless. The odd shape area calculator and border area calculator let you break irregular spaces into manageable sections to get accurate measurements. The circular bed calculator is especially handy for round rose beds and tree surrounds.

When ordering materials like topsoil, gravel, or bark mulch, UK suppliers typically sell by the cubic metre or in bulk bags (roughly 0.75-0.85 cubic metres each). Our material weight calculator converts between volume and weight for common garden materials, since a cubic metre of topsoil weighs around 1.5 tonnes whereas bark mulch weighs only 0.3-0.4 tonnes. The cost per square metre calculator helps you compare options like natural stone versus porcelain paving on a like-for-like basis.