How to choose the right finance calculator
Most money questions fall into one of three groups, and each calculator on this page is built around one of them.
Growing money. If you want to know what savings or investments could become, start with the compound interest calculator. It separates what you paid in from what interest added, year by year. For dividend stocks, the dividend reinvestment calculator shows how reinvesting payouts buys more shares over time, and the FIRE calculator turns those projections into a retirement target.
Borrowing money. The loan calculator builds a full amortization schedule for mortgages, car loans and personal loans, and shows how much an extra monthly payment saves in interest and time.
Comparing money across time or units. The inflation calculator converts amounts between today and the future, the salary to hourly calculator compares pay quoted in different periods, and the average cost calculator works out your break-even price after several purchases of the same stock.
How these calculators are built
Every calculator explains its formula on the page, includes worked examples you can check by hand, and is tested against reference values before release. You can read more about the process on our methodology page.
All results are estimates based on the numbers you enter. They do not include every fee, tax or market change, and they are not financial advice. For decisions about your own money, speak to a qualified adviser.
Your numbers stay private
The calculations run entirely in your browser. Nothing you type is sent to a server, so you can explore salaries, debts and savings goals without creating an account.