How does the Integral Calculator work?

Input function and limits (definite) or just function (indefinite) Then: Apply integration rules: power rule, u-substitution, parts Then: Results show antiderivative or area.

Can you give an example of how to use the Integral Calculator?

Example: Input ∫(x² + 3x) dx from 0 to 2 gives a result of Area = [x³/3 + 3x²/2] evaluated = 8/3 + 6 = 26/3.

Is the Integral Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Integral Calculator?

Our Integral Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Integral Calculator

Numerical Integration (Simpson's Rule)

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Upper Bound (b)

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Integration calculates area under curve: ∫f(x)dx = F(x) + C where F is antiderivative; inverse of differentiation.

Difficulty:intermediate

References

›Integral — Wikipedia

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Integral Calculator

Numerical Integration (Simpson's Rule)

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Numerical Integration (Simpson's Rule)