Slope Calculator
Slope of the line through two points (x1, y1) and (x2, y2).
Worth Knowing
Slope is rise over run — the change in y divided by the change in x — and its sign and size tell the whole story of a line's direction: positive climbs, negative falls, zero is flat, and a vertical line has undefined slope because the run is zero. Beyond geometry, slope is the concrete ancestor of the derivative in calculus, representing a rate of change, which is why it appears in everything from road gradients to the interpretation of trend lines.
How to Use
- Enter x₁ into the first field of the Slope Calculator.
- Fill in the rest: y₁, x₂, y₂.
- Your result appears instantly as you type — there's no submit button or page reload.