Midpoint / Endpoint Calculator

Calculate the midpoint, endpoint, distance, slope, and equation of a line segment.

Enter Two Known Points

Point A

x₁

y₁

Point B

x₂

y₂

Results

Midpoint

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Distance

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Slope

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Line Equation

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Midpoint Formula:
M = ((x₁ + x₂) / 2, (y₁ + y₂) / 2)

Distance Formula:
d = √((x₂ − x₁)² + (y₂ − y₁)²)

Endpoint Formula:
If the midpoint M and one endpoint are known:
x₂ = 2xₘ − x₁    and    y₂ = 2yₘ − y₁

Coordinate Graph

Point A Point B Midpoint Endpoint

The graph automatically displays Point A, Point B, their midpoint, and the line segment connecting the two points.

Endpoint Calculator

To find a missing endpoint, enter a known endpoint and midpoint below.

Known Endpoint A

x₁

y₁

Midpoint M

xₘ

yₘ

Missing Endpoint B

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