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Triangle Calculator
Solve any triangle from three sides or two sides and the angle between them: angles, area, perimeter and type.
Distance Formula Calculator
Calculate the straight-line distance between two points on a plane with the distance formula.
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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.
Distance formula
d = √((x₂ − x₁)² + (y₂ − y₁)²)
It comes from the Pythagorean theorem: the horizontal and vertical gaps are the legs of a right triangle. Example: (1, 2) to (4, 6) → √(3² + 4²) = √25 = 5.
For distances between places on a map, use the Distance Calculator (coming soon).
Frequently asked questions
Is distance always positive?
Yes, it’s a length; squaring removes the signs.
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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