diff --git a/openmmtools/multistate/multistateanalyzer.py b/openmmtools/multistate/multistateanalyzer.py
index a2de1018..ae7fd793 100644
--- a/openmmtools/multistate/multistateanalyzer.py
+++ b/openmmtools/multistate/multistateanalyzer.py
@@ -2192,6 +2192,11 @@ def statistical_inefficiency(self):
         """float: The statistical inefficiency of the sampler."""
         return self._equilibration_data[1]
 
+    @property
+    def effective_length(self):
+        """float: The length of the production data as a number of uncorrelated samples"""
+        return self._equilibration_data[2]
+
     @property
     def _decorrelated_iterations(self):
         """list of int: the indices of the decorrelated iterations truncated to max_n_iterations."""