±Free
Piecewise linear interpolation
Estimate a value within increasing x data; does not extrapolate.
Enter paired x and y lists with x strictly increasing. The calculator locates the segment containing the target and interpolates along its straight line, preserving exact endpoint values.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Increasing x values: 0,10,20 y values: 0,100,300 Target x: 5
Example result
{
"value": 50
}Limitations and details
At least two matching data pairs are required; targets outside the x range are rejected rather than extrapolated.
Inputs and options
- Increasing x values
- Text
- y values
- Text
- Target x
- Number
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.