Slope Calculator
Get the slope, distance, midpoint and equation of the line through two points.
What slope means
Slope measures how steep a line is: the rise divided by the run, m = (y₂ − y₁) ÷ (x₂ − x₁). A positive slope goes up from left to right, a negative slope goes down, and a slope of zero is flat.
Example
Through (1, 2) and (4, 8), the slope is 6 ÷ 3 = 2. The line is y = 2x, the distance between the points is √45 ≈ 6.708, and the midpoint is (2.5, 5).
Vertical lines
If both points have the same x, the run is zero and the slope is undefined. The line is written simply as x = a number.
Frequently asked questions
What is the slope of a horizontal line?
Zero, because the rise is zero.
How do I write the equation of a line?
Use y = mx + b, where m is the slope and b is the y-intercept.
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