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.
The result: 31.00 Years. To calculate the number of months from the date, enter the following formula in cell D2: =DATEDIF(A2,TODAY(),âmâ) The result: 372 Months. To calculate the number of days from the date, enter the following formula in cell E1:=DATEDIF(A1,TODAY(),âdâ) The result: 11333 Days. PS: A lot of site, avoid calculating date in Excel using DATEDIF function.