Finance Calculators

Which calculator answers your question?

Sort them by the question you are actually asking. If you are paying in regularly and want to know where that lands, use the SIP Calculator; for a single lump sum, the Compound Interest Calculator. If you are drawing money out instead, the SWP / Retirement Distribution Calculator shows how long a corpus survives a monthly withdrawal, and the RMD Calculator covers the minimum US retirement accounts require you to take once you reach the qualifying age. To judge an investment after the fact, the Investment Return (ROI) Calculator turns a gain into a comparable rate. For the long horizon, the Retirement Savings Calculator projects a target and the Coast FIRE Calculator answers the narrower question of when existing savings can grow to your goal without further contributions. On the borrowing side, the Mortgage Calculator gives the monthly payment and the Mortgage Payoff Calculator shows what an extra payment removes in interest and years. The Inflation Calculator sits underneath all of them, converting past or future amounts into today's purchasing power.

Read the assumptions before you trust the number

Every projection here rests on a constant rate of return, and no real market delivers one — the same average arrived at through a different sequence of good and bad years produces a materially different outcome, which matters most when you are withdrawing rather than contributing. The figures also exclude taxes, fund fees, transaction costs and any change in your contributions, all of which compound in the wrong direction. Treat the output as a way to compare scenarios against each other, not as a forecast of a specific balance on a specific date. The safest use is to change one input at a time and watch which direction the answer moves.

Estimates, not advice

These calculators are educational. They do not know your tax position, debts, dependants, employer benefits, risk tolerance or time horizon, and none of them constitutes financial, tax, investment or legal advice. Before acting on anything you see here, check it against your own circumstances with a qualified professional. Your inputs are never transmitted — the arithmetic happens in your browser and nothing is stored.