Compound Interest Calculator

Works on desktop, tablet, and mobile. Monthly chart points. Choose £ or $.

Nominal Real
Final balance (nominal)
Total contributions
Total interest earned
Notes:
  • Contributions are assumed to occur at the end of each contribution period.
  • “Real” values are inflation-adjusted using the inflation rate you enter.
  • Chart plots end-of-month balances (monthly points).

Balance over time

Year-by-year breakdown

End-of-year values
Year Start Balance Contributions Interest End Balance End Balance (Real)

Privacy Policy

Effective date: 2026-01-07

This Privacy Policy explains how this website (the “Site”) collects, uses, and shares information when you use it. The Site provides a compound interest calculator and may display advertising.

Information we collect

  • Information you enter: Values you type into the calculator (e.g., deposit, rate, years) are processed in your browser to show results. The Site does not require you to create an account.
  • Log data: Like most websites, servers may automatically receive information such as IP address, browser type, pages visited, and timestamps. This is generally used for security, diagnosing issues, and basic site operation.
  • Cookies / similar technologies: Cookies may be used by the Site and/or third parties to deliver advertising, measure performance, and help prevent fraud/spam.

Advertising

The Site may use third-party advertising networks, including Google (for example, Google AdSense), to show ads. These partners may use cookies or similar identifiers to serve ads, measure ad performance, and limit how often you see an ad.

Google AdSense and personalised advertising

  • Third-party vendors, including Google, use cookies to serve ads based on a user’s previous visits to this website or other websites.
  • Google’s use of advertising cookies enables Google and its partners to serve ads to users based on their visit to this Site and/or other sites on the Internet.
  • You can opt out of personalised advertising by visiting Google’s Ads Settings. You can also learn more about third-party vendor opt-outs at industry opt-out sites.

How we use information

  • To operate the Site and provide the calculator functionality.
  • To maintain, secure, and improve the Site (for example, fixing bugs and preventing abuse).
  • To display and measure advertising (where enabled).

Sharing of information

We may share information with service providers that help operate the Site (e.g., hosting, security, and advertising providers). Advertising partners may process information as described above for the purpose of serving and measuring ads.

Your choices

  • Cookies: You can control cookies through your browser settings. Disabling cookies may affect how ads are served.
  • Personalised ads: You can manage personalised ad settings using Google’s ad controls and relevant opt-out tools.

Children’s privacy

This Site is not directed to children under 13 (or the minimum age required in your jurisdiction), and we do not knowingly collect personal information from children.

Changes to this policy

We may update this Privacy Policy from time to time. The “Effective date” above indicates when it was last updated.

Contact

If you have questions about this Privacy Policy, please contact: eddspaceuk@gmail.com