The Safe, Free Box Plot Tool for Classrooms
Why thousands of high school and university statistics teachers are switching from TI-84s and Excel to PlotNerd.
100% Privacy & COPPA Safe
PlotNerd runs entirely in the browser. No student data is ever sent to our servers. We don't require accounts, logins, or email addresses. It's safe for students of all ages.
Chromebook Ready
No installation required. Works instantly on Chromebooks, iPads, tablets, and phones. Just share the link and start analyzing data in seconds.
Teaches the "Why"
Unlike black-box calculators, PlotNerd shows the 5-number summary, identifies outliers using both IQR and MAD, and lets students compare different calculation methods.
Free Forever
No subscriptions, no "Pro" version for essential features. We are committed to keeping PlotNerd free for educational use. Check out our Free Learning Resources.
Review from Educators
"My students used to get frustrated with Excel. With PlotNerd, I can focus on teaching statistics instead of troubleshooting software issues. It just works."
"Finally, a tool that works on my school's Chromebooks without needing admin permissions to install. A lifesaver."
Classroom Activity Idea: "The Outlier Hunt"
Objective: Teach students how a single data point can skew the mean but not the median.
- Have students enter their estimated height in cm into PlotNerd.
- Observe the Box Plot and the Mean/Median values.
- Ask one student to enter "300" (3 meters) as a data point.
- Watch how the Box Plot compresses and the Mean jumps, while the Median stays stable.
- Use the "Outlier Toggle" to see how the IQR method flags the new value.
Comparison with Alternatives
| Feature | PlotNerd | Excel | GraphPad |
|---|---|---|---|
| Cost | Free | ~$100/year | ~$300+/year |
| Installation | None | Yes | Yes |
| Chromebook Ready | Limited | ||
| Learning Curve | Low | Medium | High |