How it works
Slope m = (y₂ − y₁) / (x₂ − x₁), when x₂ is not equal to x₁.
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FREE INTERACTIVE CALCULATOR
Slope Calculator
Find the slope, angle and equation of a line from two coordinates.
YOUR INPUTSLIVE RESULTS
CALCULATED RESULTSlope: 2
Equation: y = 2x · Angle: 63.4349°
Worked example
The points (1, 2) and (4, 8) create a slope of 2 and the equation y = 2x.
The default values in the tool are illustrative. Change them to match your situation.
Assumptions and limitations
A vertical line has undefined slope and an equation of the form x = constant.
Results are educational estimates, not professional financial advice or a lender quote.
Frequently asked questions
How does this slope calculator work?
Slope m = (y₂ − y₁) / (x₂ − x₁), when x₂ is not equal to x₁.
What is an example?
The points (1, 2) and (4, 8) create a slope of 2 and the equation y = 2x.
What assumptions or limitations apply?
A vertical line has undefined slope and an equation of the form x = constant.
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Content created October 23, 2026. Methods and editorial standards.