Distance in a 3D coordinate space: The distance between two points on a 3D coordinate plane can be found using the following distance formula. d = √ (x 2 - x 1) 2 + (y 2 - y 1) 2 + (z 2 - z 1) 2. where (x 1, y 1, z 1) and (x 2, y 2, z 2) are the 3D coordinates of the two points involved. To find the distance between two places, enter the start and end destination and this distance calculator will give you complete distance information. distancesfrom.com can calculate the shortest distance and the fastest distance between any two cities or locations. The distance formula is $\text{ Distance } = \sqrt{(x_2 -x_1)^2 + (y_2- y_1)^2}$ Below is a diagram of the distance formula applied to a picture of a line segment Distance formula. The formula for distance, if you know time (duration) and the average speed, is: d = v x t. where v is the velocity (average speed), t is the time and d is distance, so you can read it as Distance = Speed x Time. The result will depend on the unit of the speed metric, for example if speed is given in mph, the result will be in ...