By Zencalcy Editorial TeamLast reviewed About us
Slope m = (y₂−y₁)/(x₂−x₁): the steepness of the line through two points. Horizontal lines give 0; vertical lines are mathematically undefined and flagged as such — never a fake number.
Rise over run through two points; vertical lines flagged undefined.
m = (y₂ − y₁) / (x₂ − x₁)
| Symbol | Meaning |
|---|---|
| m | Slope (rise over run) |
(1,2)→(5,10): m = 8/4 = 2. Same-x points → undefined (vertical). Same-y points → 0 (horizontal).
Continue with the Percentage Calculator, all math calculators, or browse the full calculator directory.
How much y changes per unit of x — steepness and direction.
Click to use the Absolute Value Calculator and get instant results.
Click to use the Basic Calculator and get instant results.
Click to use the Scientific Calculator and get instant results.
Click to use the Exponent Calculator and get instant results.
Click to use the Square Root Calculator and get instant results.
Click to use the Cube Root Calculator and get instant results.
Content updated: September 2026