Cubic Regression Calculator

CURVE FITTING

Cubic Regression Calculator

Fit a third-degree polynomial y = a + bx + cx² + dx³ to your data using least-squares method

Last updated: March 2026

Cubic Fit Calculator

Enter at least 4 points. One pair per line (comma or space separated).

CUBIC EQUATION

y = 1.0000 + 0.0000x + 0.0000x² + 1.0000x³

a (intercept)

1.0000

b (linear)

0.0000

c (quadratic)

0.0000

d (cubic)

1.0000

R² (Fit Quality)

1.000000

Points Fitted

6

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