Calculus
Definite Integral Calculator
Lets users solve and check definite integral instantly with formula, steps and examples — no manual math.
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105000
Your result
Definite integral
9
∫ from 0 to 3 of f(x) dx ≈ 9 (Simpson's rule).
Method
Simpson's rule, n=1000
About this calculator
Evaluates the definite integral ∫ₐᵇ f(x) dx — the signed area under the curve — using Simpson's rule, which fits parabolas to pairs of intervals for high accuracy.
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