The Ohio Child Support Calculator will provide an estimate of the support obligations that may be included in a court or administrative child support order. However, the following calculator provides an estimate of a potential alimony award in the State of Ohio.Ohio Child Support Calculator - Guidelines Calculator. No formula under Ohio law specifies how spousal support is calculated. (However, some courts offer guidelines that will at least get you in a ballpark.) Ohio does not use a specific mathematical formula to calculate alimony. However, this calculator offers an estimate of a potential alimony award in Ohio. In Ohio, the state uses a pre-set formula to calculate child support obligations. Family law courts will only deviate from the formula in narrow circumstances. To calculate the amount of basic support under Ohio's current child support guidelines, you can use the official Ohio Child Support Calculator.