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📈 Compound Interest Calculator

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

Compound Interest Calculator

Model savings growth with compounding frequency, recurring contributions, and inflation-adjusted projections.

Future value£1,647.01
Total interest£647.01
Total contributions£0.00
Inflation-adjusted value£1,351.12

Year-by-year projection

YearBalanceContributionsInterest earned
1£1,051.16£0.00£51.16
2£1,104.94£0.00£104.94
3£1,161.47£0.00£161.47
4£1,220.90£0.00£220.90
5£1,283.36£0.00£283.36
6£1,349.02£0.00£349.02
7£1,418.04£0.00£418.04
8£1,490.59£0.00£490.59
9£1,566.85£0.00£566.85
10£1,647.01£0.00£647.01

How to use this tool

  1. Set principal, rate, time horizon, and compounding frequency.
  2. Add monthly contributions and inflation assumptions.
  3. Review year-by-year balances and export projection data.

Planning usage

  • Projection rows help compare conservative vs aggressive assumptions.
  • Inflation-adjusted value highlights real purchasing power.
  • Contribution modeling shows the long-term effect of consistent deposits.

Interpretation

  • Outputs do not include tax, fees, or market volatility.
  • Higher compounding frequency slightly increases future value at the same nominal rate.
  • Scenario analysis is recommended before committing to financial targets.

FAQ

Is this investment advice?
No. It is a projection tool for planning and education.
Does it support recurring contributions?
Yes. Monthly contributions are distributed across compounding periods.
Can I export the schedule?
Yes. Download CSV for yearly projections or JSON for full report metadata.

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