When a child is involved in a family dispute, both custody and support can become major issues of contention. A parent who cares for the child may be entitled to receive child support from the other parent. There is a statewide formula that is used to calculate the amount of such support. You can use child support calculators on the California court website to estimate the amount of child support. However, there are some basic factors may be used for calculation of support. Being aware of these factors can be extremely important.