Slope Calculator
Calculate slope instantly in your browser.
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What this tool does
Calculate slope instantly in your browser. A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
How to use the Slope Calculator
- Enter or select x₁.
- Enter or select y₁.
- Enter or select x₂.
- Enter or select y₂.
- Read the calculated result; change any measurement to compare alternatives.
Formula
slope m = (y₂ − y₁)/(x₂ − x₁) — rise over run; the line's equation is y = mx + b with intercept b = y₁ − m·x₁.
- x1
- x₁
- y1
- y₁
- x2
- x₂
- y2
- y₂
A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
Worked example
For slope calculator, the following measurements illustrate the exact method: x₁: 1; y₁: 2; x₂: 5; y₂: 8.
Inputs
- x₁1
- y₁2
- x₂5
- y₂8
Result
- Slope (m)1.5
- Y-intercept (b)0.5
- Equation of the liney = 1.5x + 0.5
- Angle of incline (degrees)56.31
- Distance between the points7.21
Results explained
- Slope (m)
- Slope (m) from the formula above. A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
- Y-intercept (b)
- Y-intercept (b) from the formula above. A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
- Equation of the line
- Equation of the line from the formula above. A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
- Angle of incline (degrees)
- Angle of incline (degrees) from the formula above. A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
- Distance between the points
- Distance between the points from the formula above. A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
Frequently asked questions
slope m = (y₂ − y₁)/(x₂ − x₁) — rise over run; the line's equation is y = mx + b with intercept b = y₁ − m·x₁.
A positive slope rises left to right, a negative slope falls, and a zero slope is a horizontal line.
Where mathematically meaningful, yes. Fields specify permitted ranges and undefined operations display an error.
Exact integer calculations use safe integers; decimal calculations use browser floating point, so small rounding differences can occur.
All values remain in your browser and are never uploaded.