Compute Percentiles for Excel Files Online

What is the difference between quantile_cont and median in a Excel file?

median() is exactly equivalent to quantile_cont(col, 0.5) — the 50th percentile using linear interpolation. quantile_cont always interpolates between real values if the exact percentile falls between two data points. quantile_disc (discrete) always returns an actual value from the dataset.

What is MAD and when should I use it for Excel data?

MAD stands for Median Absolute Deviation — it measures the spread of the data around the median. It is more robust than standard deviation because it is not affected by extreme outliers. Use it when your data has heavy tails or outliers that would inflate the standard deviation.

Can I compute percentiles per group in a Excel file?

Yes. Set the Group By column and all selected statistics are computed independently within each group. The output has one row per group with all the requested statistics as columns.

Is my data private?

Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.

What is the maximum file size?

The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.