Category
Free online calculators
Free calculators for everyday maths: percentages, discounts and changes, and the monthly payment and total interest of a mortgage. Instant, no sign-up.
Calculators tools
Calculators for the numbers that matter
What a discount really comes to, what percentage a rise represents, or how much a mortgage costs each month and in total: these are sums you do rarely, but at moments when getting them wrong is expensive. Each calculator shows the result instantly and explains the formula below, with examples and tables.
The results are estimates: they are meant to give you an idea and let you compare options, and they do not replace a binding offer from a lender or advice from a professional.