How does this relate to the Pythagorean theorem?

The distance formula is the Pythagorean theorem applied to the horizontal and vertical differences between two points.

Distance Formula Calculator

Calculate the straight-line distance between two (x, y) points using the distance formula, derived from the Pythagorean theorem.

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Formula

d = √((x2−x1)² + (y2−y1)²)

How Slope Is Calculated, and Why It's Called 'Rise Over Run'

The slope formula explained with a worked example, and how slope connects to real-world grade and pitch measurements.

Slope Calculator

Calculate the slope between two points on a line.

Pythagorean Theorem Calculator

Calculate the hypotenuse or a leg of a right triangle.

Percentage Calculator

Find what percentage one number is of another, or calculate percentage change.

Percentage Change Calculator

Calculate the percentage increase or decrease between two values.

Quadratic Equation Solver

Solve ax² + bx + c = 0 for real roots using the quadratic formula.

Average (Mean) Calculator

Calculate the average of up to 10 numbers.