Financial Math Calculators
Simple, free tools for everyday money maths, starting with percentages.
See all calculator categories →
About financial math calculators
Almost every money sum rests on the same maths: percentages, discounts, increases and changes. These calculators do that maths so you can understand orders of magnitude and decide with confidence, and they link to the tax, interest and margin calculators where those percentages show up. They are educational estimates that do not replace professional advice. Each calculator shows the formula it uses and links to the article that goes deeper.
Learn
The calculators provide educational estimates and do not constitute financial advice.