job = execute(qwalk_circuit, backend='ibmq_16_melbourne', shots=1000)

results = job.result()

time = job.result().time_taken

What are the units of time? And where is this stated in the documentation?


  • 1
    $\begingroup$ I tried to run a job and compare the output of time_taken to the runtime in IBM quantum experience, but I cannot find any relation between the two. $\endgroup$
    – Mauricio
    Jul 29, 2022 at 13:45
  • 1
    $\begingroup$ Looks like missing from the docs indeed: qiskit.org/documentation/stubs/… $\endgroup$
    – 3yakuya
    Jul 29, 2022 at 16:56

1 Answer 1


As @3yakuya has said, this is missing from the documentation.

The best I could find is a Qiskit tutorial (version 0.37.1) which uses the parameter. According to this tutorial (see the 3rd code cell), the unit of time appears to be seconds:

Screenshot from the Qiskit tutorial

  • $\begingroup$ I tried a job that took many minutes and another that took seconds to run and the `time_taken’ was pretty similar. I wonder what is it actually measuring $\endgroup$
    – Mauricio
    Jul 30, 2022 at 8:20

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