Title: Calculation of $$\pi $$ on the IBM quantum computer and the accuracy of one-qubit operations
Abstract: A quantum algorithm for the calculation of $$\pi $$ is proposed and implemented on the five-qubit IBM quantum computer with superconducting qubits. We find $$\pi =3.157\pm 0.017$$ . The error is due to the noise of quantum one-qubit operations and measurements. The results can be used for estimating the errors of the quantum computer and suggest that the errors are purely random.