Riemann Sum Calculator

The function whose area under the curve is approximated. Each Riemann rule samples it on a grid and adds up rectangle or trapezoid areas.

The left end of the interval the sums are taken over. It must be less than b.

The right end of the interval. The interval [a, b] is split into n equal subintervals.

How many equal pieces the interval is cut into. Try a small n like 10 to see the rules differ, then increase it and watch every sum converge to the true integral.