Slope calculator
Enter two coordinate points and get the slope, the line equation in slope-intercept form, the distance between points, and the midpoint.
Slope (m)
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y-intercept (b)
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Equation
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Distance
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Midpoint
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Angle
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Formulas
Slope: m = (y₂ - y₁) / (x₂ - x₁)
y-intercept: b = y₁ - m × x₁
Equation: y = mx + b
Distance: d = √((x₂-x₁)² + (y₂-y₁)²)
Midpoint: M = ((x₁+x₂)/2, (y₁+y₂)/2)
Special cases
| Case | Slope | Equation |
|---|---|---|
| Horizontal line | 0 | y = b |
| Vertical line | undefined | x = a |
| Positive slope | m > 0 | rises left to right |
| Negative slope | m < 0 | falls left to right |
Frequently asked
What is slope?
Slope (m) = (y₂ - y₁) / (x₂ - x₁). It measures how steeply a line rises or falls. A positive slope goes up left to right; negative goes down; zero is horizontal; undefined (infinity) is vertical.
What is the slope-intercept form?
y = mx + b, where m is the slope and b is the y-intercept (where the line crosses the y-axis).
How do I find the y-intercept from two points?
First calculate m, then b = y₁ - m × x₁. The calculator does this automatically.
What is the distance formula?
Distance = √((x₂-x₁)² + (y₂-y₁)²). This is the Euclidean distance between the two points, which equals the hypotenuse of the right triangle formed by dx and dy.
How do I share my calculation?
Click "Share with my numbers" to copy a URL that saves all four coordinates.