answered 12/22/2009 On A Map Drawn To Scale, 1/2 Inch Equals 1 Mile. What Length On The Map Equals 5 Miles? Multiply the scale measurement for 1 mile (1/2 inch per mile) by 5 miles: 1/2 × 5 or 1/2 × 5/1 = 5/2. Reduce this fraction, and you get 2.5 inches. :)