Financial Calculators

Plan a mortgage, see how savings grow with compound interest, or work out the monthly instalment on a loan. Each calculator shows the formula, a worked example and a year-by-year schedule, and runs privately in your browser.

Compound Interest CalculatorSavings growth with monthly deposits, any compounding frequency and inflation.EMI / Loan CalculatorMonthly instalment, total interest and a full repayment schedule.Mortgage CalculatorMonthly payment with taxes, insurance and PMI, extra payments, US and UK modes.

Guides

All guides →
GuideHow Loan EMI Is Calculated (Formula and Worked Example)The EMI formula step by step, how tenure and rate change it, and the flat-rate trap.

Which calculator do I need?

  • Buying a home: the mortgage calculator includes property tax, insurance and PMI in US mode, and repayment or interest-only in UK mode.
  • Saving or investing: the compound interest calculator adds monthly deposits and shows the result in today's money after inflation.
  • A car, personal or home loan quoted as EMI: the EMI calculator gives the monthly instalment and total interest.

How we build these calculators

Each calculator uses the standard published formula, which is shown on its page with a worked example you can check by hand. We test the results against the formula, state every assumption next to the result, and update a page only when its content actually changes.

Frequently asked questions

Are these calculators financial advice?

No. They give estimates for planning, based on the numbers you enter and the assumptions stated on each page. Check important decisions with your lender or a qualified adviser.

Which currency do the calculators use?

Any. The mortgage and compound interest calculators let you choose $, £ or €, and the EMI calculator works with any currency you type.

Do you store the numbers I enter?

No. Calculations run in your browser and nothing you type is sent to or saved on our servers.