Calculating how to generate retirement income from several accumulated income producing assets is not easy. Each of the assets would have a different expected return.
Most calculators optimize for the scenario of not running out of money. While being poor in retirement is a concern, we should also realize that we have finite time.
Personal Capital Retirement Calculator
Personal Capital is a free tool with many different features. I use it to track my net worth regularly. It also alerts me if there are hidden fees in my portfolio, and has a budget tracker included.
There are several early retirement calculators available that make retirement planning easy. Try all of them to see which one works best for your situation.