This online coordinate geometry calculator helps you to find the gradient and equation of a straight line: $y=mx+c$ given any two coordinates. The midpoint and Distance between 2 points can also be found. Coordinates can be entered in the following format:$(2,6)$ . Learn How to use the Coordinate Geometry Calculator. If you are interested in revising or practicing then you can visit our Equation of line Quiz or the Gradient of a line Quiz and Midpoint Quiz. They are excellent quiz generators. Detailed solutions for incorrect answers are provided.