Everyday Calculator Toolbox
Percentages, ages and unit conversions for shopping, planning and paperwork.
Working out a sale price, checking an age on a form, or converting a recipe from cups to millilitres should not require a spreadsheet. The Everyday Calculator Toolbox collects quick calculators for the numbers that show up in daily life.
Each calculator shows its result instantly as you type and explains the formula it uses, so you can double-check the maths yourself. Results are general calculations, not financial or professional advice.