Run up to 1,000 iterative calculation steps to find the input value that produces a target output. Developer tier.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Upload your XLSX file and specify the target cell, desired value, and input cell
The engine iterates the calculation up to 1,000 times using binary search
Download the workbook with the converged input value filled in
0 bytes uploaded. Goal Seek Simulator runs entirely in your browser using SheetJS and ExcelJS. Your spreadsheets never leave your device.
Excel's Goal Seek is not available in browser environments. This tool replicates the same iterative algorithm using the file's cached formula values.
If no solution is found within 1,000 iterations, the tool reports the closest value achieved and the residual error.
Paste any Excel formula and get a plain-English breakdown of every nested function, argument, and logical step. Pro tier.
Open toolPerform Left Join or Inner Join between two sheets in an Excel workbook (or two files) on a common key column. Pro tier.
Open tool