Choose your tool

CALCULATORS TOOL

Lagrange Polynomial Interpolator

Evaluate the unique interpolating polynomial at a supplied x coordinate.

◇ Browser only

Your text

Or load a UTF-8 text file

0 lines · 0 characters

ResultsReady when you are

Your results will appear here.

Copy or download your result below.

Your text stays on this device.

LESS BUSYWORK, MORE DONE

Three steps. That’s it.

A useful toolkit for text, data, images and calculations.

01
Add your input
Choose a tool, enter values or select a file.
02
Make it yours
Adjust the options and run the action.
03
Take the result
Copy the result or download its file.

Polynomial interpolation calculator online

Evaluate the unique interpolating polynomial at a supplied x coordinate. Use this for the specific transformation described above. Start with the fixed sample and compare its result before replacing it with your own representative input.

How to use it

Paste JSON matching the structure in the example. Set evaluate at x. Choose Calculate. Review the output, then copy or download it.

Options and example settings

Option	Choices / value	Example default
Evaluate at x	Enter evaluate at x.	1.5

Worked examples

Use this for the specific transformation described above. Start with the fixed sample and compare its result before replacing it with your own representative input.

Reproducible worked example

Settings: Evaluate at x: 1.5

Input:

[[0,1],[1,3],[2,7]]

With the input and settings above, the tool produces:

Output:

{
  "x": 1.5,
  "y": 4.75
}

For this input, “x” is 1.5; “y” is 4.75. These are the named fields in the example output.

Limitations and common mistakes

Calculations use your supplied assumptions and floating-point arithmetic. Check input order, units and the worked example before relying on a result.
Combined input is bounded to 150,000 characters; output text is bounded to 1.2 million characters. Some algorithms impose smaller limits, stated in their error messages.

Frequently asked questions

What format should I enter?

Paste JSON matching the structure in the example. The worked example shows the supported structure and actual output.

How can I evaluate the unique interpolating polynomial at a supplied x coordinate online?

Paste JSON matching the structure in the example. Set evaluate at x. Choose Calculate. Review the output, then copy or download it.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.