Web2.0calc.com – Free Online Scientific Calculator with advanced function and useful web 2.0 interface.
Web2.0calc is the supreme online tool for your daily math. Many powerful features like complex numbers, vector/matrix-operations, big-number calculations and unit/conversions making your old calculator look like a toy. In the “Expert Calc 2.0” mode, you can edit your equations in the full-page editor, use Shared Calculations or embed it into your blog/homepage.
Web2.0calc