Geometry

Parabola Vertex & Focus Calculator

Easily calculate the vertex and focus of a parabola from its standard equation. Visualize parabola properties with an interactive graph.

Parabola Equation

Select the orientation of the parabola and input the parameters \(h\), \(k\), and \(p\).

Enter Parameters

Properties

Vertex (V): $$V(x, y) = (h, k)$$
X:
Y:
Focus (F): $$F(x, y) = (h, k+p)$$ (Vertical) or $$F(x, y) = (h+p, k)$$ (Horizontal)
X:
Y:

Parabola Visualization

Understanding Parabola Properties

A parabola is a symmetrical U-shaped curve. Key properties include the vertex, the point where the parabola changes direction, and the focus, a point that helps define the shape of the parabola.

Formulas & Definitions

  • Vertical Parabola: Equation is given by \((x-h)^2 = 4p(y-k)\).
    • Vertex (V): \((h, k)\)
    • Focus (F): \((h, k+p)\)
  • Horizontal Parabola: Equation is given by \((y-k)^2 = 4p(x-h)\).
    • Vertex (V): \((h, k)\)
    • Focus (F): \((h+p, k)\)
  • \(h\), \(k\) define the vertex position, and \(p\) determines the shape and direction of the parabola.

How to Use This Calculator

1. Select Orientation: Choose between vertical or horizontal parabola. 2. Enter Parameters: Input the values for \(h\), \(k\), and \(p\). These values define the parabola's position and shape. 3. Calculate: Press the "Calculate" button to find the vertex and focus. 4. View Results: The vertex and focus coordinates will be displayed, and a visualization of the parabola will be shown below. 5. Copy Output: Use the copy icons to easily copy the calculated coordinates.

Frequently Asked Questions

What is the Parabola Vertex & Focus Calculator?
The Parabola Vertex & Focus Calculator is an online Geometry calculator. You enter your values, and it returns the answer with the steps shown so you can follow along.
How accurate is the Parabola Vertex & Focus Calculator?
The solver uses a math engine that avoids the floating-point rounding errors you get from most hardware calculators. For typical homework and professional calculations, the results will match what you would get by hand.
Can I use the Parabola Vertex & Focus Calculator for professional Geometry projects?
Yes. The math behind it is standard Geometry, so the results are reliable for professional use. That said, always double-check that your inputs are in the right format before relying on the output.
Why use the Parabola Vertex & Focus Calculator instead of calculating by hand?
Manual calculation is slow and error-prone, especially with multiple steps. This tool does the arithmetic for you and shows each step, so you can catch mistakes before they carry forward.
How do I format my inputs for the Parabola Vertex & Focus Calculator?
Type your numbers into the input fields. Leave out units and symbols unless a field specifically asks for them. The solver handles the rest.