Power Calculators

b Y-Intercept Calculator

Find the y-intercept when the slope and one point on a line are known.

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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 Y-Intercept

Find the point where a non-vertical line crosses the y-axis.

🧮 Formula

Where

  • m = slope
  • x,y = known point
  • b = y-intercept
b = y - mx.

✏️ Worked example

m = 2 through (3,10)

You enter
Slope m2
x3
y10
You get
Y-intercept b4

The y-intercept is 4.

Try this example →

🧭 How to use this calculator

What you enter

  • Slope m
  • x
  • y

What you get

  • Y-intercept b

💡 Line form

  • The resulting line can be written as y = mx + b.

❓ Frequently asked questions

What does the y-intercept mean?

It is the value of y when x is zero.