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Slope Calculator

Find the slope of a line through two points, with the equation in slope-intercept and point-slope form, the angle and the distance. Free.

Point 1 (x₁, y₁)
Point 2 (x₂, y₂)
Slope
m = 2
Slope-intercept form
y = 2x + 0
Point-slope form
y − 2 = 2(x − 1)
Rise / run
6 / 3
Angle with the x-axis
63.4349°
Distance
6.708204

Rise over run

The slope of a line measures how steep it is: the change in y divided by the change in x between two points, m = (y₂ − y₁) / (x₂ − x₁). A positive slope rises from left to right, a negative one falls, zero is horizontal and a vertical line has an undefined slope. Enter two points to get the slope, the line's equation in slope-intercept form (y = mx + b) and point-slope form, its angle with the x-axis and the distance between the points.

How to use it

  1. 1

    Enter the first point

    Its x and y coordinates.

  2. 2

    Enter the second point

    Any other point on the line.

  3. 3

    Read the slope and equation

    Plus the angle and the distance between the points.

Frequently asked questions

What's the slope formula?

m = (y₂ − y₁) / (x₂ − x₁). For (1, 2) and (4, 8): (8 − 2) / (4 − 1) = 2.

How do I find the y-intercept?

b = y₁ − m × x₁. With m = 2 and the point (1, 2): b = 2 − 2 = 0, so y = 2x.

How do I turn slope into a percentage grade?

Multiply by 100. A slope of 0.08 is an 8% grade, common for road and ramp gradients.

Is anything sent to a server?

No. Everything is calculated in your browser, and nothing you type is stored or sent anywhere.

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