Savings Goal Calculator — time to reach it
See how long to reach a savings goal — or how much to save monthly — given a target and interest rate, in your browser.
🔒 Runs entirely in your browser. Your input and output are never sent to a server or stored — fully private.
For estimation only — not financial advice.
About this tool
This savings goal calculator answers two practical questions: how long it will take to reach a target amount given what you put aside each month, or how much you need to save each month to hit a goal by a set date. Enter your target, any amount you have already saved, an expected annual interest rate and either a monthly contribution or a deadline, and it works out the missing piece while accounting for interest compounding along the way. Everything is calculated locally in your browser, so none of your savings details are uploaded.
Frequently asked questions
Does it take interest into account?
Yes. If you enter an annual rate above zero, the calculator grows your balance with monthly compounding: each month it adds your contribution and then applies one twelfth of the annual rate to the running total. That means money saved earlier earns more, so reaching a goal can take a little less time, or a slightly smaller monthly amount, than simple addition would suggest. Set the rate to zero to see the result from contributions alone.
What is the difference between the two modes?
In time-to-goal mode you provide a monthly contribution and it tells you how many months and years until your balance reaches the target. In monthly-amount mode you provide a deadline and it tells you how much to set aside each month to arrive on time. Both use the same target, starting balance and interest rate, so you can flip between them to balance how fast you want to get there against how much you can comfortably save.
How accurate is the projection?
It is a clean projection that assumes a steady contribution and a constant interest rate, with nothing leaving or entering outside your plan. Real savings rarely behave so smoothly: interest rates change, returns on investments vary or can fall, and inflation erodes what the money buys. Treat the result as an educational estimate to plan with, not financial advice or a guarantee, and revisit it as your rate or budget changes. The figures stay in your browser and are never stored.