Evaluate a polynomial
Substitute the selected x value using Horner's method.
P(x)=aₙxⁿ+…+a₀
Polynomial Tools
Evaluate, add, subtract, multiply, differentiate, solve, and factor polynomials.
Version 1.0 · Last Updated: August 11, 2026 · Maintained by ToolLarder
Online polynomial calculator and polynomial operations
Enter coefficients from the highest degree to the constant term to evaluate polynomials, perform arithmetic, differentiate, solve roots, and display factors for real-root polynomials.
Polynomial arithmetic
Align like degrees for addition and subtraction; distribute every term for multiplication.
(P·Q)(x)=P(x)Q(x)
Polynomial derivative
Multiply each coefficient by its exponent and reduce the exponent by one.
d(axⁿ)/dx=naxⁿ⁻¹
Find polynomial roots
Numerically find real and complex roots through degree ten.
P(x)=0
Factor a polynomial
When all roots are real, display the leading coefficient and linear factors.
P(x)=a(x−r₁)…(x−rₙ)