The calculator, which you can grab right here, is developed by SpireTECH IT Services. Click through for a list of features.
- Imports characters from Battle.net.
- Full analysis of all character skills and their impacts on DPS and EHP.
- Character overview with attribute equivalents in terms of EHP and DPS.
- Item comparisons for DPS and effective health.
- Include any combination of skills in EHP and DPS calculations.
- Compare any configuration of main hand, off hand, two-hand or dual-wield weapon(s) to any other configuration.
- Updated to version 1.0.4.
So that should be rather helpful.