How the math works
Without interest: total = monthly × months. With annual rate r: future value of an ordinary annuity.
Example
- Enter how much you can set aside each month.
- Choose a time horizon.
- Optionally add a conservative annual rate for a savings account style estimate.
Catch the catches
- A boring automatic transfer beats an ambitious number you skip by week two.
Questions
Are these calculators free?
Yes. They run in your browser. You do not need an account, and we do not require personal financial data to use them.
Should I treat the result as a bank or store quote?
No. Results are educational math. Merchants, lenders, and tax rules can differ. Verify the live terms before you pay.