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Slope Calculator
Find the slope of a line through two points, with its angle of inclination, y intercept and equation.
Slope calculator
Slope: —
Angle of inclination: —
y intercept: —
Equation: —
How to use the Slope Calculator
- Enter the x and y of the first point on the line.
- Enter the x and y of the second point on the line.
- Read the slope, the angle, the y intercept and the line equation.
Features
- Slope from any two points
- Angle of inclination in degrees
- y intercept and full line equation
- Handles vertical and horizontal lines
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Frequently Asked Questions
Common questions about the free online slope calculator.
Divide the change in y by the change in x between the two points. The tool does this
instantly and also shows the angle.
A positive slope means the line rises as you move to the right, while a negative slope means
it falls.
A vertical line has no defined slope because the change in x is zero, and the tool reports it
as undefined.
The angle is the inverse tangent of the slope converted to degrees, and it always lies
between 0 and 180 degrees.
It is the value of y where the line crosses the vertical axis, found by substituting x equals
zero into the equation.
Yes. Negative and decimal values both work, and the slope is calculated in exactly the same
way.
No. The slope calculator runs entirely in your browser, so your coordinates stay on your own
device.
Yes, the slope calculator is free to use as often as you like, with no account and no usage
limits.
Last updated: October 10, 2026