Midpoint of a Line Segment Calculator: M = ((x1 + x2)/2, (y1 + y2)/2)

Midpoint of a Line Segment Calculator

📈 Coordinates & graphs. Use the Midpoint of a line segment formula to find midpoint x, x₁, x₂: pick the value you want, type the others, and the answer updates as you go.

M = \left(\dfrac{x_1 + x_2}{2},\ \dfrac{y_1 + y_2}{2}\right)

Works the same way for the y-coordinate.

Midpoint xx₁x₂

Midpoint x2.5

Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.

What each letter means

Quantity	Unit
Midpoint x	no unit
x₁	no unit
x₂	no unit

Worked example

Find the midpoint x when x₁ = 1, x₂ = 4.

Using M = ((x1 + x2)/2, (y1 + y2)/2): Midpoint x = 2.5.

Frequently asked questions

What is the formula for Midpoint of a line segment?

M = ((x1 + x2)/2, (y1 + y2)/2). Works the same way for the y-coordinate.

What do the letters stand for, and what units are used?

Midpoint x, x₁, x₂.

How do you calculate midpoint x?

Put the values into M = ((x1 + x2)/2, (y1 + y2)/2). For example, with x₁ = 1, x₂ = 4, midpoint x = 2.5.

Can I solve for a different value?

Yes. In the calculator above, pick the circle next to any value (midpoint x, x₁, x₂) and fill in the others: it rearranges the formula for you.