java applet

Pie Charts

How to add dynamic real-time Pie Charts to web pages and applications

Pie charts (or sometimes called circle charts) provide a visual representation of data as slices of a pie. The greater the data value the larger the pie slice. The sizes of each slice are calculated such that the total sum of all the data elements will represent the full 360 degree pie circle.

The example below shows a simple 2D version of the pie chart representing sales figures by region. In addition to the absolute dollar value a percentage figure is also calculated for each pie segment.

single pie chart

For a more professional look and greater visual impact the pie can be drawn in 3D. This example shows the pie being drawn with quite a 3D angle. Of course the 3D angle may varied to provide quite a variety of pie charts.3D pie chart

Multiple pie charts can be drawn of varying sizes to provide another dimension to the data.

multiple pie chart

As can be seen the larger pie in this example explodes the pie segments giving a very professional image.

Image Quality

This is particularly important for pie charts. All of the images above have been produced by using a technique known as Anti Aliasing. Basically this means the borders of the pie have been smoothed to provide a much higher quality image. Without this technique the pie segments would look jagged and reduce the visual impact.


Pie Charts provide a great way to display the proportions of a set of data. The human eye can easily see the ratios between the individual data items. This makes the pie chart the ideal tool for displaying any series of data where relative value is important.

View more pie chart examples here »


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Main Features Summary

  • 2D/3D Graphing Mode
  • Various Data Sources (Files, Databases, Scripts/Server processes, HTML parameters).
  • JavaScript interaction.
  • Printer Friendly
  • Labels On/Off, Font and Color Selectable
  • Target Lines
  • Trend Lines
  • Multiple Plots
  • Configurable Point Symbols
  • Automatic Legend Generation
  • Configurable Number of decimal places to show values
  • Label Orientation
  • Configurable Depth of the 3D effect
  • Display Values on Mouse Over events
  • URL link on Mouse Click Events
  • Free Form Images can be incorporated into the Chart Canvas
  • Free Form Lines of Text can be incorporated into the Chart Canvas