Q: Father lives in Arizona, mother lives in CA. How do I determine how much to give for child support? A; The courts use dissomaster to calculate. You may want to check out the department of child support services (DCSS) website, which provides a similar calculator for free. A few years back these two calculators did not produce the same numbers but since last year they fixed the problem. The calculator is very straightforward. You need to input a bunch of information such as your salary, your time, etc., and you can play around with the numbers as well. The other option is to go to the self-help center of your local court, where you can use the dissomaster on their computers for free.