Math Calculators
Slope Calculator
Find the slope between two points.
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About the Slope Calculator
Slope measures how steep a line is — the change in y over the change in x. Enter two points and the calculator returns the slope, the line's angle, and its equation in y = mx + b form. It's a core algebra and graphing tool, and it correctly flags vertical (undefined-slope) lines.
How to use the Slope Calculator
- 01Enter your two points (x₁, y₁) and (x₂, y₂).
- 02Read the result instantly — it recalculates as you type.
- 03Adjust the numbers to model different scenarios.
Frequently asked questions
How do you calculate slope?
Slope m = (y₂ − y₁) ÷ (x₂ − x₁), often described as 'rise over run'.
What is the slope of a vertical line?
Undefined — the run (change in x) is zero, so you can't divide. This tool flags that case.