Visit one of the many websites that offer automated linear mile calculations. Some adequate choices are Free Map Tools, Daft Logic and Indo.
Follow the website's instructions for entering the city and state of your beginning and ending location. Some sites will allow you to pinpoint your locations by clicking the spots on a virtual map.
Press the appropriate button to calculate the linear mile, in terms of distance, between the two locations. The final calculation will be accurate for the exact mileage between your chosen points.
Deduct your first x-coordinate from your second x-coordinate. For example, assume your coordinates are (-2, 4) and (4, 12); subtract -2 from 4, which equals 6.
Figure the square of result from Step 1. For example, given the answer to the equation from the above, you should square 6, which equals 36.
Deduct your first y-coordinate from your second y-coordinate. If the coordinates are (-2, 4) and (4, 12), deduct 4 from 12, which equals 8.
Figure the square of the answer from Step 3. From the current example, the square of 8 is 64.
Figure the sum of the answers from Steps 2 and 4. In the current example, add 36 and 64, which equals 100.
Calculate the square root of the answer from Step 5 to determine the linear distance between the coordinates. From this example, the square of 100 is 10.
