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Percentage Calculator
Find a percentage of a number, what percent one number is of another, or the whole from a part.
Slope Calculator
Find the slope (rise over run) between two points, plus the line equation, angle and distance.
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How to use this calculator
Enter your values. The result updates as you type; press Calculate to confirm and jump to the result on mobile. Use Share to send the calculator with your result.
Slope formula
m = (y₂ − y₁) ÷ (x₂ − x₁) = rise ÷ run
y = mx + b, b = y₁ − m·x₁
Positive slope rises left to right; negative falls; 0 is horizontal; a vertical line has undefined slope. Example: (1, 2) and (4, 8) → m = 6 ÷ 3 = 2, y = 2x + 0.
Frequently asked questions
What does a slope of 2 mean?
The line goes up 2 units for every 1 unit to the right.
About this tool
- Written by
- [Author: to be assigned]
- Reviewed by
- Formula tests passed · human review pending
- Last updated
- 31 Oct 2026
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