How it works
Calculate a reserve target using the number of months you choose and subtract existing savings. The tool does not prescribe a target.
target = monthly spending × months
Worked example
Show example inputs and result
Essential monthly spending: 2,500 · Months to cover: 6 · Already saved: 5,000.
- Target reserve
- 15,000
- Remaining gap
- 10,000
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy