How the math works
Without interest: months = remaining / monthly. With annual rate r, remaining shrinks as monthly deposits compound monthly.
Example
- Set a specific goal amount.
- Enter current savings.
- Enter a monthly amount you can actually repeat.
- Optionally add a conservative annual rate.
Catch the catches
- If monthly is zero and there is no interest, the goal is not reachable in this model.
- A smaller automatic transfer that happens beats an optimistic number you skip.
Questions
Is this investment advice?
No. It is a savings-goal model. Optional interest is a simple educational estimate, not a forecast of market returns.
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.