Midpoint is generally most accurate; more subdivisions = better accuracy.

Riemann Sum Calculator

Approximate integrals with Riemann sums

Lower Bound (a)

Upper Bound (b)

Subdivisions

Function

Formula

Sum = Σ f(xᵢ) × Δx

Riemann sums approximate definite integrals by summing rectangular areas.

Midpoint ≈ 2.66 (exact: 8/3).

Approximate integrals with Riemann sums.

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