About graphingcalculator.org

What this site is

graphingcalculator.org is a small, independent collection of free math utilities. It does two things well: it generates printable graph paper — coordinate planes, isometric grids, and log-log paper — as true-scale PDFs, and it runs a set of statistics calculators and graph makers for everyday classroom and coursework tasks: standard deviation, correlation, confidence intervals, z-scores, percentiles, box-and-whisker plots, scatter plots, bell curves, and grade curves.

Every tool is free to use, works without an account, and has no download limits or watermarks.

Who it's for

The site is used by math and science teachers building worksheets and class sets, by students and parents working through homework, and by anyone who occasionally needs a sheet of graph paper printed at an exact size or a statistic worked out with the steps shown. The tools are designed to be usable in a couple of clicks, from a phone or a laptop, without a tutorial.

How the tools work

Everything runs in your browser. When you adjust a grid or paste a data set, the preview, the math, and the exported file are all built locally on your device — nothing you type is uploaded to a server or stored in an account. Graph paper is produced as a true-scale PDF: print it at 100% (no "fit to page") and a grid square measures exactly what you set it to. Charts and results export as PDF, PNG, SVG, or CSV.

Our commitment to accuracy

Math tools are only useful if they're right. The generators and calculators are backed by an automated test suite that checks the underlying geometry and statistics — grid spacing and axis placement, the mm-to-point conversion behind true-scale printing, and the formulas each calculator uses — so a wrong number or a mislabeled axis is caught before it ships. Each calculator also shows its formula and working, not just a final answer, so you can check it yourself.

How the site is funded

graphingcalculator.org is supported by advertising, which is what keeps every tool free and free of sign-up walls. Ads are clearly labeled and kept out of the way of the tools. We show a consent banner where required and load advertising only after you accept. See our privacy & cookies page for the details of what is and isn't collected.

Contact

Questions, bug reports, or an idea for a tool we should add? Visit the contact page or send a note through the feedback form — no account or email address required.