The Free Online Compound Interest Calculator with Deposits is a free, accurate online tool designed to help you plan smarter financial decisions in seconds. Just enter initial principal investment, annual interest rate, number of years, compounding frequency, regular additional deposit, deposit frequency and instantly see future value of investment, total principal invested, total interest earned. Financial planning is one of the most important skills you can build, and small math mistakes can cost you thousands over time. This calculator removes the guesswork by applying the exact same formulas banks, advisors, and analysts use, so you always get a number you can trust. Under the hood, the tool applies the standard formula: FV = P(1 + r/n)^(nt) + PMT × (((1 + r/n)^(nt) - 1) / (r/n)). You can see exactly how the result is derived, which is especially useful for students, professionals, and anyone who wants to learn rather than just get an answer. CalcPlanet builds every calculator to be fast, mobile-friendly, and free, with no signup required. We test results against worked examples and reference implementations so you can rely on what you see. Enter your values above to get an instant, accurate free online compound interest calculator with deposits result, then explore the FAQs and examples below for deeper context.
The Free Online Compound Interest Calculator with Deposits is a free, accurate online tool designed to help you plan smarter financial decisions in seconds. Just enter initial principal investment, annual interest rate, number of years, compounding frequency, regular additional deposit, deposit frequency and instantly see future value of investment, total principal invested, total interest earned. Financial planning is one of the most important skills you can build, and small math mistakes can cost you thousands over time. This calculator removes the guesswork by applying the exact same formulas banks, advisors, and analysts use, so you always get a number you can trust. Under the hood, the tool applies the standard formula: FV = P(1 + r/n)^(nt) + PMT × (((1 + r/n)^(nt) - 1) / (r/n)). You can see exactly how the result is derived, which is especially useful for students, professionals, and anyone who wants to learn rather than just get an answer. CalcPlanet builds every calculator to be fast, mobile-friendly, and free, with no signup required. We test results against worked examples and reference implementations so you can rely on what you see. Enter your values above to get an instant, accurate free online compound interest calculator with deposits result, then explore the FAQs and examples below for deeper context.
The Compound Interest Calculator with Deposits on CalcPlanet is engineered for accuracy, speed and zero friction. Enter your numbers, see results instantly, and explore the full formula and worked example below — no signup, no paywall, no tracking of your inputs.
FV = P(1 + r/n)^(nt) + PMT × (((1 + r/n)^(nt) - 1) / (r/n))
(principal * Math.pow(1 + (annual_rate / 100) / compound_frequency, compound_frequency * years)) + (additional_deposit * (((Math.pow(1 + (annual_rate / 100) / deposit_frequency, deposit_frequency * years) - 1) / ((annual_rate / 100) / deposit_frequency))))
FV = Future Value, P = Principal Investment, r = Annual Interest Rate, n = Number of Times Compounded Per Year, t = Number of Years, PMT = Regular Deposit Amount
Yes. Every calculator on CalcPlanet is 100% free, requires no signup, and runs entirely in your browser. There are no usage limits and no paywall.
The calculator applies the standard formula (FV = P(1 + r/n)^(nt) + PMT × (((1 + r/n)^(nt) - 1) / (r/n))) and is tested against worked examples. Results are accurate to the precision of the inputs you provide.
Yes. CalcPlanet is fully mobile-optimized. The interface, inputs, and results all adapt to phones and tablets, and you can save the page as a home-screen shortcut for one-tap access.
No. All calculations run locally in your browser. Your inputs never leave your device unless you explicitly choose to share or save a result.
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