Power Calculators

─ Horizontal Line Equation Calculator

Find the equation of a horizontal line through a given y-coordinate.

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Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Horizontal Line

Find a horizontal line equation from its y-coordinate.

🧮 Formula

Equation
y = c

Where

  • c = fixed y-coordinate
Horizontal line: y = c.

✏️ Worked example

Horizontal line at y = 4

You enter
Y Coordinate4
You get
Horizontal line y =4

The line is y = 4.

Try this example →

🧭 How to use this calculator

What you enter

  • Y Coordinate

What you get

  • Horizontal line y =

💡 Common uses

  • Coordinate geometry homework and revision
  • Analytic geometry calculations
  • Checking graph and line calculations

❓ Frequently asked questions

What is the slope of a horizontal line?

Its slope is zero.