Numerical Integration Calculator

Approximate definite integrals using Simpson's 1/3 Rule, the Trapezoidal Rule, and Riemann midpoint sums.

Function f(x)

Lower (a)

Upper (b)

Even Subintervals (n)

Simpson's 1/3 Rule Approximation

Trapezoidal Rule:1.95409

Step Size (Δx = (b-a)/n):0.5236

How to Use

Enter the function f, lower, upper and even subintervals.
Select Compute Simpson's & Trapezoidal to view the simpson's 1/3 rule approximation.