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An online calculator for approximating a definite integral using Simpson's (parabolic) 1/3 rule, with steps shown. If the calculator did not compute something or you have identified an error, or you have a suggestion/feedback, please write it in the comments below.
Free Simpson's Rule calculator - approximate the area of a curve using Simpson's rule step-by-step
Simpson's rule for definite integrals: Enter a function f (x), use the a and b sliders to choose the limits of integration, and use the n slider to increase the number of subintervals. (Note n must be even.) to save your graphs!
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Enter the function you want to integrate and specify the integration interval. The simpson's rule integral calculator then divides this interval into smaller, equally spaced subintervals and computes the function's values at the endpoints and midpoints of these subintervals.
Use Simpson's Rule to find the approximate value of the integral: from x = to x =, with interval width equal to
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