Free interactive student tool
Free Polynomial and Exponential Regression Calculator
Free Polynomial and Exponential Regression Calculator. One engine with model selection; give each model unique worked examples rather than duplicating pages.
Immediate resultNo sign-up requiredTransparent methodOptional email copy
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Your result
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Least-squares curve fitting
How this tool reaches its result
The tool fits polynomial models up to degree four or an exponential model when every outcome is positive.
Least-squares curve fitting
Worked context
How to interpret the output
A quadratic model can capture one bend that a straight line cannot.
Important limitation
What the result cannot decide for you
A higher R² does not automatically justify a more complex model; inspect residuals and overfitting.