The following calculator provides an estimate of a potential alimony award in the State of Ohio. Ohio does not use a specific mathematical formula to calculate alimony.However, this calculator offers an estimate of a potential alimony award in Ohio. 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. For guidance in using this calculator, please see the JFS 07766 Ohio Child Support Guideline Manual. Learn how Ohio judges decide whether to award spousal support, how much payments will be, how long they'll last, and when alimony can change or end. 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 Child Support Calculator. Click HERE to access the calculator.