diff --git a/glue/ligolw/lsctables.py b/glue/ligolw/lsctables.py
index <HASH>..<HASH> 100644
--- a/glue/ligolw/lsctables.py
+++ b/glue/ligolw/lsctables.py
@@ -1839,6 +1839,9 @@ class SimInspiral(object):
 	def get_eff_dist(self, instrument):
 		return getattr(self, "eff_dist_%s" % instrument[0].lower())
 
+	def get_chirp_dist(self,instrument,ref_mass = 1.40):
+		return self.get_eff_dist() * (2.**(-1./5) * ref_mass / self.mchirp)**(5./6)
+
 
 SimInspiralTable.RowType = SimInspiral
added chirp distance method to SimInspiral PR <I>