What this calculator does
Enter your savings target, current balance, and weekly savings rate. The calculator shows how many weeks until you reach the goal.
The math
Weeks to goal = (target − current savings) ÷ weekly savings.
Worked example
Saving for a $2,000 purchase with $400 already saved and $75 per week takes about 21.3 weeks to reach the goal.
Why this matters
Saving and investing work best when the timeline is concrete. This calculator replaces vague goals with a date, a contribution, or a target you can automate.
Methodology and transparency
This page publishes the exact formula used to compute the result, so you can verify it in a spreadsheet or check the assumptions against your own situation. The worked example uses the tool default inputs; change any number and the result updates live in your browser. No data is sent or stored.
Common questions
Does this include interest?
No. It is a simple linear savings timeline. Use the Compound Interest Grapher for interest-bearing savings.
What if I save monthly instead?
Divide your monthly savings by 4.33 to get the weekly equivalent.
How can I reach the goal faster?
Increase weekly savings, lower the target, or start with a larger lump sum.