diff --git a/esmf_regrid/schemes.py b/esmf_regrid/schemes.py
index a9c2528e..58eb6939 100644
--- a/esmf_regrid/schemes.py
+++ b/esmf_regrid/schemes.py
@@ -191,10 +191,11 @@ def _cube_to_GridInfo(cube, center=False, resolution=None, mask=None):
             lat_bound_array = _contiguous_masked(lat.bounds, mask)
         # 2D coords must be AuxCoords, which do not have a circular attribute.
         circular = False
-    lon_bound_array = lon.units.convert(lon_bound_array, Unit("degrees"))
-    lat_bound_array = lat.units.convert(lat_bound_array, Unit("degrees"))
-    lon_points = lon.units.convert(lon.points, Unit("degrees"))
-    lat_points = lon.units.convert(lat.points, Unit("degrees"))
+    if crs is None:
+        lon_bound_array = lon.units.convert(lon_bound_array, Unit("degrees"))
+        lat_bound_array = lat.units.convert(lat_bound_array, Unit("degrees"))
+        lon_points = lon.units.convert(lon.points, Unit("degrees"))
+        lat_points = lon.units.convert(lat.points, Unit("degrees"))
     if resolution is None:
         grid_info = GridInfo(
             lon_points,