diff --git a/src/utils/units.irp.f b/src/utils/units.irp.f
new file mode 100644
index 00000000..1850b28b
--- /dev/null
+++ b/src/utils/units.irp.f
@@ -0,0 +1,22 @@
+BEGIN_PROVIDER [double precision, ha_to_ev]
+
+  implicit none
+  BEGIN_DOC
+  ! Converstion from Hartree to eV
+  END_DOC
+
+  ha_to_ev = 27.211396641308d0
+
+END_PROVIDER
+
+BEGIN_PROVIDER [double precision, au_to_D]
+
+  implicit none
+  BEGIN_DOC
+  ! Converstion from au to Debye
+  END_DOC
+
+  au_to_D = 2.5415802529d0
+
+END_PROVIDER
+