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Trapezoidal Rule Calculator

Approximate the definite integral of a function over [a, b] by summing trapezoid areas across n subintervals. Ideal for numerical integration when an antiderivative is difficult or impossible to find analytically.

Lower Limit (a)

Upper Limit (b)

Number of Subintervals

Average Trapezoid Height

Fill in the required fields to see your result.

Calculus

Definite Integral Calculator

Numerically evaluates the definite integral of a power function ax^n over a specified interval. Choose from Simpson's Rule, Trapezoidal Rule, or the Midpoint Rectangle Method for your approximation.

Coefficient (a)

Exponent (n)

Lower Limit

Upper Limit

Number of Intervals

Integration Method

Fill in the required fields to see your result.

Key differences

	Trapezoidal Rule Calculator	Definite Integral Calculator
Category	Calculus	Calculus
Inputs required	4	6
Result	Approximate Integral	Definite Integral
What it does	Approximate the definite integral of a function over [a, b] by summing trapezoid areas across n subintervals. Ideal for numerical integration when an antiderivative is difficult or impossible to find analytically.	Numerically evaluates the definite integral of a power function ax^n over a specified interval. Choose from Simpson's Rule, Trapezoidal Rule, or the Midpoint Rectangle Method for your approximation.