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Both calculators run independently — change the inputs on either side to compare results.

Definite Integral Calculator

Compute the exact or approximate area under a polynomial curve between two bounds. Ideal for calculus students and engineers evaluating net change, area, or accumulated quantities.

Coefficient

Power of x

Lower Limit

Upper Limit

Fill in the required fields to see your result.

Calculus

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

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Key differences

	Definite Integral Calculator	Trapezoidal Rule Calculator
Category	Calculus	Calculus
Inputs required	4	4
Result	Integral Value	Approximate Integral
What it does	Compute the exact or approximate area under a polynomial curve between two bounds. Ideal for calculus students and engineers evaluating net change, area, or accumulated quantities.	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.