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📈 Compound Interest

Calculate compound interest on savings or investments. Choose compounding frequency and growth duration.

Compound Interest Calculator

Estimate how your investment grows over time with compound interest. Adjust the rate, duration, and compounding frequency to see the results instantly.

Future Value
£1647.01
Total Interest
£647.01
Formula: A = P(1 + r/n)nt, where P is principal, r is annual interest rate, n is compounding frequency, and t is years.

Ways to use it

  • Forecast savings account growth for budgeting.
  • Compare investment products with different compounding schedules.
  • Model long-term returns to inform retirement planning.

Tips

  • Use decimal rates (e.g. 5) rather than 0.05 for percentages.
  • Experiment with daily vs monthly compounding to see the impact.
  • Remember taxes and fees aren’t included—adjust your projections accordingly.

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