Calculators.265 free tools for the sums trades do every day.
94 calculatorsElectricalOhm’s law, power, cables, AC, motors, lighting and testing.68 calculatorsGas and plumbingGas rates, heat input, hot water, radiators, hydraulics and drainage.42 calculatorsBricklayingBricks and blocks, mortar, setting out, arches and site maths.61 calculatorsCarpentryTimber, sheets, joinery, roofs, stairs and fixings.
Know the sums. Then practise the job. Explore Tradefox simulation courses ›
Results are arithmetic from the formula shown. They do not replace manufacturer instructions, regulations, design calculations or inspection and testing by a competent person.