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Investment Calculators

Explore compound growth, regular investing, future value and returns.

Most of the tools here use compound-growth math, but they answer different planning questions. The Compound Interest Calculator separates your deposits from the growth on them. The Investment Calculator also adjusts the result for inflation, while the SIP Calculator handles monthly systematic investment plans and optional annual step-ups.

The remaining tools answer planning questions: future value ("what will this be worth?"), present value ("what is a future amount worth today?"), and ROI ("what did this investment actually return, annualized?"). Every calculator states its compounding assumptions explicitly and shows the year-by-year table behind the headline number.

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Compound Interest CalculatorGrowth of a lump sum plus contributions, with any compounding frequency.Investment CalculatorGrowth projection with monthly contributions and inflation-adjusted results.SIP CalculatorSIP maturity value with annual step-up and invested-vs-gains breakdown.

All investment calculators

Compound Interest CalculatorGrowth of a lump sum plus contributions, with any compounding frequency.Future Value CalculatorTextbook TVM future value with annuity-due timing and compounding options.Investment CalculatorGrowth projection with monthly contributions and inflation-adjusted results.Lump Sum Investment CalculatorOne-time investment growth with doubling time and ±2% rate context.Present Value CalculatorDiscount a future amount or payment stream to its value in today's money.ROI CalculatorTotal and annualized return on a completed or current investment.Simple Interest CalculatorFlat interest via I = P × r × t, with a side-by-side compound comparison.SIP CalculatorSIP maturity value with annual step-up and invested-vs-gains breakdown.

A note on return assumptions

Every projection depends on the return rate you enter, while real investment returns change from year to year and are not guaranteed. Try a lower, middle and higher rate rather than treating one output as a forecast. Pay particular attention to the lower-rate result: it shows whether the plan still works when returns disappoint.

Related guides

All guides
GuideHow Compound Interest WorksThe mechanism of interest-on-interest: frequency effects, the Rule of 72 tested, and time asymmetry.GuideHow Inflation Affects Your SavingsThe arithmetic of purchasing power: real returns, computed examples, and honest options for savers.GuideLump Sum vs Monthly InvestingWhat the math says about investing all at once versus averaging in — and when each approach fits.

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Savings CalculatorsPlan regular deposits, savings goals and interest growth.Personal Finance CalculatorsBuild a workable budget and compare ways to repay debt.