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. Ohio Child Support Calculator - Guidelines Calculator.The following calculator provides an estimate of a potential alimony award in the State of Ohio. Does Ohio Have an Alimony 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.) To calculate the amount of basic support under Ohio's current child support guidelines, you can use the official Ohio Child Support Calculator. See how parenting time affects the total. Welcome to the Child Support Guideline Manual for Ohio. MA_2017 is a software tool for calculating spousal support and child support based on income equalization principles alluded to in the Ohio Revised Code.