Method
Slope m = (y₂ − y₁)/(x₂ − x₁), and y-intercept b = y₁ − mx₁, giving y = mx + b.
Math worksheet
Slope and Line Calculator
Find rise, run, slope, intercept, angle and the equation of the line through two coordinate points.
The calculation runs locally. Exact-integer tools avoid floating point; decimal and transcendental tools report rounding limits.
Method and verification guide
How the Slope and Line Calculator works
Slope m = (y₂ − y₁)/(x₂ − x₁), and y-intercept b = y₁ − mx₁, giving y = mx + b. The calculator keeps the intermediate values visible so you can reproduce the answer independently.
Interpret the result
Positive slope rises left-to-right, negative slope falls, zero slope is horizontal, and equal x-values form a vertical line.
Check the assumptions
A vertical line has undefined slope and cannot be written in y = mx + b form.
Local calculation
Everything runs in this browser. Inputs are not sent to an external calculator.
Rounding
Displayed values may be rounded for readability while calculations use full floating-point precision unless the tool explicitly uses exact integers.
Scope
A vertical line has undefined slope and cannot be written in y = mx + b form.
Simple by design
Three steps to a clearer number.
Enter your details
Use realistic values in each field. You can change them anytime.
Calculate instantly
The formula runs locally, so there is no account or waiting time.
Use the result
Treat the answer as a practical estimate for your next decision.