Saving is a planning problem
A target such as "a deposit by December" needs two numbers: how much you can put aside each month and how many months you have. Once those are fixed, the rest is arithmetic, and the calculator shows whether the goal is reachable.
What interest changes
On short goals, interest changes the result very little. Over several years it matters more. Entering 0 gives you the pure saving plan, which is a good conservative baseline.
Making it happen
Set up the monthly amount to move automatically on payday so you do not rely on willpower. Treat it as a goal with milestones, and use the Goal Breakdown Calculator or the habit tracker to keep the routine going.
Frequently asked questions
How is interest calculated?
Interest is compounded monthly at the annual rate divided by 12, with deposits made at the end of each month. Real accounts differ, so treat this as an estimate.
Is this financial advice?
No. It is a simple calculator for planning. It ignores tax, fees and inflation. Speak to a qualified adviser for personal financial decisions.
Is my data stored?
No. The calculation happens in your browser and nothing is sent or saved.
Which currency does it use?
Any. It only does arithmetic, so enter amounts in your own currency.