How to run excel goal seek without excel — binary search solver in your browser
- Step 1Upload your XLSX file — Drop the workbook containing the formula you want to solve.
- Step 2Specify target cell — Enter the cell address of the output formula (e.g. D5).
- Step 3Enter desired value — Type the target output value you want D5 to equal (e.g. 1000000).
- Step 4Specify input cell — Enter the input cell address to vary (e.g. B2). Download the result workbook.
Frequently asked questions
What types of formulas does Goal Seek support?+
The solver works on arithmetic formulas (+, -, *, /) and basic functions (SUM, ABS, ROUND). Complex functions like VLOOKUP, INDEX/MATCH, or IF require static values for non-input references.
What if the solution doesn't converge?+
If no solution is found within 1,000 iterations, the tool reports the best approximation found and the residual error.
Privacy first
Every JAD Excel tool runs entirely in your browser using SheetJS and ExcelJS. Your spreadsheets, formulas, and data never leave your device — verified by zero outbound network requests during processing.