The midpoint of two coordinates is the point thatâ€™s exactly halfway between the two points, or the average of the two points. Instead of trying to visually determine the halfway point of a steep line drawn on a coordinate plane, you can use the midpoint formula. The midpoint formula -- [(x1 + x2)/2, (y1 + y2)/2] -- determines the coordinates of the midpoint between any two endpoints (x1, y1) and (x2, y2). The first part of the formula calculates the average x-coordinate of the endpoints, and the second part calculates the average y-coordinate of the endpoints.

Input any two coordinates into the midpoint formula. For this example, use the coordinates (5, 6) and (1, 2). This yields the following: [(5 +1)/2, (6 + 2)/2].

Add 5 and 1, which equals 6.

Divide 6 by 2, which equals 3. This is the average x-coordinate of the endpoints.

Add 6 and 2, which equals 8.

Divide 8 by 2, which equals 4. This is the average y-coordinate of the endpoints.

Write the x- and y-coordinates as an ordered pair, which equals (3, 4). This is the midpoint of (5, 6) and (1, 2).

#### Tip

To use an easier method to find the midpoint of a horizontal or vertical line drawn between two points on a plane, count the number of units on the respective x- or y-axis between the two points and divide by 2.