What is Charty?

Charty is a daily data visualization game that tests your ability to accurately estimate proportions in charts. Each day, anyone who plays will see the same 6 charts and have to guess what percentage a specific category represents.

This started as a cheeky way to get data on how much worse pie charts *actually* are than bar charts. Go to the data page for more details on that.

As I made it, I thought it was actually pretty fun! I spent some time to to make it into an actual game.

How to Play

Just guess the number! Some tips below:

  • For small slices, mentally fit them into larger slices and see how many copies you'd need
  • People tend to over-estimate small pie chart slices!
  • Scoring is just based on error. You can take your time.
  • Track your performance over time and watch your improvement!

Contact

Feel free to reach out with suggestions, feedback, or questions!

© 2025 Charty. All rights reserved.