diff --git a/docs/tutorials/grover_with_sampler.ipynb b/docs/tutorials/grover_with_sampler.ipynb
index a1cbd2787..de017a145 100644
--- a/docs/tutorials/grover_with_sampler.ipynb
+++ b/docs/tutorials/grover_with_sampler.ipynb
@@ -212,7 +212,7 @@
    "outputs": [],
    "source": [
     "optimal_num_iterations = math.floor(\n",
-    "    math.pi / 4 * math.sqrt(2**grover_op.num_qubits / len(marked_states))\n",
+    "    math.pi / (4 * math.asin(math.sqrt(len(marked_states) / 2**grover_op.num_qubits)))\n",
     ")"
    ]
   },