Slope Calculator Online
Published On: 20/02/2026
Slope Calculator
Point 1
Point 2
Enter two points (x1, y1) and (x2, y2). The calculator uses m = (y2 − y1) / (x2 − x1). If x2 equals x1, the line is vertical and the slope is undefined.
Input guide:
- x1 — the X-coordinate (horizontal value) of the first point.
- y1 — the Y-coordinate (vertical value) of the first point.
- x2 — the X-coordinate (horizontal value) of the second point.
- y2 — the Y-coordinate (vertical value) of the second point.
The Slope Calculator is a simple web-based tool that calculates the slope of a straight line between two points in a 2D coordinate system.
The slope formula is:
m=y2−y1x2−x1m = \frac{y2 - y1}{x2 - x1}m=x2−x1y2−y1
Where:
-
(x1, y1) = First point
-
(x2, y2) = Second point
-
m = Slope
🔎 What This Tool Does:
-
Takes four numeric inputs (x1, y1, x2, y2)
-
Calculates the slope instantly
-
Detects vertical lines (undefined slope)
-
Displays clear error messages if inputs are invalid
This calculator is perfect for:
-
Students learning algebra or geometry
-
SAT / ACT math practice tools
-
Teachers building math micro-tools
-
Educational websites