Ohio Revised Code Title XXXI. Domestic Relations Children § 3121.52

(A) If the support order is to be paid weekly, multiply the weekly amount of support due under the order by fifty-two and divide the resulting annual amount by twelve;

(B) If the support order is to be paid biweekly, multiply the biweekly amount of support due under the order by twenty-six and divide the resulting annual amount by twelve;

(C) If the support order is to be paid periodically but is not to be paid weekly, biweekly, or monthly, multiply the periodic amount of support due by an appropriate number to obtain the annual amount of support due under the order and divide the annual amount of support due by twelve.