Enter the starting principal, monthly contribution, annual rate, term, and compounding frequency; the final value updates as you type.
- Enter the starting principal and the monthly contribution.
- Enter the annual interest rate and the number of years.
- Pick a compounding frequency: monthly, annually, or daily.
- Read the final value, total contributed, and interest earned - they update automatically, no button to click.
Compound Interest Calculator
Project how a starting balance and regular contributions grow with compound interest over time.
Enter the starting principal, monthly contribution, annual rate, term, and compounding frequency; the final value, total contributed, and interest earned update as you type - there is no submit button.
Use it to estimate a savings or retirement balance, or compare how compounding frequency changes the result.
Output is a single USD figure with no growth chart or export - for a jurisdiction-specific plan that accounts for taxes and inflation, use this as a quick sanity check, then talk to a licensed advisor.
The math runs locally in the browser - no upload and no account.
Frequently Asked Questions
What does Compound Interest Calculator do?
Project how a starting balance and regular contributions grow with compound interest over time.
When should I reach for compound interest calculator?
Use it to estimate a savings or retirement balance, or compare how compounding frequency changes the result.
Does this account for taxes or inflation?
No. Results are an estimate based on a constant rate; they do not account for taxes, inflation, or fees, and this is not financial advice.
Is anything I type uploaded or saved?
No. The math runs locally in the browser - no upload, no account, and nothing is stored beyond the current page session.