Was wondering how many calories (aprox) is in home made vegetable broth with only water and vegetables?

I made some vegatable broth with only water, half a head of cabbage, one beet, 5 carrots, two leaks, and one med onion. I have looked online but there are so many different numbers with no reasons behind them. I then strained out all the vegatable matter and would just like to know how much the broth would count for in calories.