There is an **extension** for Inkscape called [**NiceCharts**][1] that is good for creating basic pie and bar charts. It hasn't been updated since 2012, but it seems to be working nicely.

Alternatively, you can use Gnome's [**Gnumeric**][2] to create the charts and export them as **SVG**. If you have them in Excel, you can actually import them into Gnumeric and from there export as SVG. 


  [1]: https://launchpad.net/nicecharts
  [2]: https://projects.gnome.org/gnumeric/