102 inches is legal, but that must include your side mirrors too. Wide body motorhomes have the body being 102 inches and the mirrors can stick out at least another foot on each side. How far you can stray from the interstate varies by state.
Sometimes, you need to know exactly how many years, months and days between two dates, in this situation, the following long formula may help you. 1. Years,  & DATEDIF(B1,B2,YM) &  Months,  & DATEDIF(B1,B2,MD) &  Days. Note: In the above formula, B1 indicates the start date and B2 stands for the end date, you can modify them as you need.
DATE_IN_FUTURE Calculate a date N days in the future. RP_CALC_DATE_IN_INTERVAL Add days/months to a date. RP_CALC_DATE_IN_INTERVAL Add/subtract years/months/days from a date. SD_DATETIME_DIFFERENCE Give the difference in Days and Time for 2 dates. MONTH_PLUS_DETERMINE Add or subtract months from a date.To subtract a month, enter a negative value for the âmonthsâ parameter.ATE_IN_FUTURE Calculate a date N days in the future. RP_CALC_DATE_IN_INTERVAL Add days/months to a date. RP_CALC_DATE_IN_INTERVAL Add/subtract years/months/days from a date. SD_DATETIME_DIFFERENCE Give the difference in Days and Time for 2 dates. MONTH_PLUS_DETERMINE Add or subtract months from a date.