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Finance

Interest Calculator

Calculate interest earned, future value, and effective annual return from principal, rate, time, and compounding.

Interest inputs

Estimate how interest grows on savings, deposits, and simple investment balances.

Future value 0
Interest earned 0
Effective annual rate 0

This calculator is for general information only and is not financial, tax, lending, investment, or legal advice. Actual loan terms, rates, fees, taxes, and qualification rules can vary by lender, country, and personal situation.

Formula

Future value = principal x (1 + annual rate / compounds per year)^(compounds per year x years).

Example

$10,000 at 5% compounded monthly for 10 years grows to about $16,470.

Result notes

  • Results are estimates based on the values you enter.
  • Calculators with schedules show how values change over time.
  • For financial, health, or construction decisions, compare these estimates with professional advice when needed.

Frequently asked questions

What does compounding mean?

Compounding means interest can earn more interest over time.

Is daily compounding always better?

For the same stated rate, more frequent compounding produces a slightly higher effective return.

Can this be used for savings accounts?

Yes. It is useful for savings, CDs, deposits, and simple fixed-return estimates.

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