About Us — Mean Absolute Deviation (MAD) Calculator | Mean Absolute Deviation Calculator

Mean Absolute Deviation (MAD) is one of those concepts people learn once and then keep Googling. I wanted a tool that’s obvious: paste numbers, see the mean and MAD about the mean instantly—no fiddly settings.

What this calculator does well

Paste & go: enter values separated by commas, spaces, or new lines.
Multiple datasets: each non-empty line is treated as a separate dataset, plus an “All numbers” roll-up for convenience.
Digits control: adjust decimal precision for clean reporting (rounding is display-only).
Copy results: grab a TSV table straight to your clipboard for spreadsheets or reports.
Instant updates: results re-compute as you type.

Why MAD?

MAD is easy to interpret because it stays in your data’s original units. It’s a practical spread measure for classrooms, quick analyses, dashboards, and any place you want a typical distance from the mean without over-weighting outliers.

What I care about

Accuracy first. The math is clear and the output is easy to check.
Privacy by default. You shouldn’t need an account just to compute a statistic.
Speed & clarity. Clean typography and mobile-first ergonomics.
Accessibility. Keyboard-friendly inputs and readable UI.

Roadmap

Optional weights and grouped summaries
Export to CSV/PDF
Quick charts (histogram/box) for each dataset
Convenient toggles for median absolute deviation and other dispersion measures
Dark mode

Say hello

Got feedback, a bug, or a feature idea? I’d love to hear it. The best way to reach me is the contact page. Your notes help keep the tool sharp and genuinely useful.