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Compound Interest Calculator

See how your savings grow over time with compound interest.

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📐How Compound Interest Works

Future Value Formula

FV = P × (1 + r/n)^(n×t) + C × [(1 + r/n)^(n×t) − 1] ÷ (r/n)
  1. 1P = Initial principal (starting amount).
  2. 2r = Annual interest rate as a decimal (e.g. 7% = 0.07).
  3. 3n = Compounding frequency per year (monthly = 12, daily = 365).
  4. 4t = Time in years.
  5. 5C = Monthly contribution. The second term calculates the future value of all contributions combined.
  6. 6Compounding means interest earns interest — more frequent compounding leads to higher returns.

* Results are pre-tax. Consider tax-advantaged accounts (401k, IRA, Roth) to maximize long-term growth.

Financial DisclaimerThe results provided by this calculator are for informational and educational purposes only and do not constitute financial, investment, or lending advice. Calculator outputs are estimates based on the inputs you provide and standard mathematical formulas — actual results will vary based on lender terms, fees, credit score, market conditions, and other factors not captured here. Always consult a licensed financial advisor, mortgage broker, or CPA before making any significant financial decisions. USCalculator.net is not a licensed financial institution and does not offer financial products or services.

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