@@ -198,7 +198,7 @@ def rescale(self, units=None):
         """
         Return a copy of the quantity converted to the specified units.
         If `units` is `None`, an attempt will be made to rescale the quantity
-        to preferred units (see `rescale_preferred`).  
+        to preferred units (see `rescale_preferred`).
         """
         if units is None:
             try:
@@ -217,8 +217,8 @@ def rescale(self, units=None):
                 'Unable to convert between units of "%s" and "%s"'
                 %(from_u._dimensionality, to_u._dimensionality)
             )
-        return Quantity(cf*self.magnitude, to_u)
-    
+        return Quantity(cf*self.magnitude, to_u, dtype=self.dtype)
+
     def rescale_preferred(self):
         """
         Return a copy of the quantity converted to the preferred units and scale.
@@ -238,7 +238,7 @@ def rescale_preferred(self):
                 return self.rescale(preferred)
         raise Exception("Preferred units for '%s' (or equivalent) not specified in "
                         "quantites.quantity.PREFERRED." % self.dimensionality)
-        
+
     @with_doc(np.ndarray.astype)
     def astype(self, dtype=None, **kwargs):
         '''Scalars are returned as scalar Quantity arrays.'''
 
@@ -1,4 +1,5 @@
 from .. import units as pq
+from ..quantity import Quantity
 from ..uncertainquantity import UncertainQuantity
 from .common import TestCase
 import numpy as np
@@ -31,6 +32,13 @@ def test_rescale(self):
             [0.32808399, 0.32808399, 0.32808399]*pq.ft
             )
 
+        seventy_km = Quantity(70, pq.km, dtype=np.float32)
+        seven_km = Quantity(7, pq.km, dtype=np.float32)
+        seventyish_km = UncertainQuantity(seventy_km, pq.km, seven_km, dtype=np.float32)
+        self.assertTrue(seventyish_km.dtype == np.float32)
+        in_meters = seventyish_km.rescale(pq.m)
+        self.assertTrue(in_meters.dtype == seventyish_km.dtype)
+
     def test_set_uncertainty(self):
         a = UncertainQuantity([1, 2], 'm', [.1, .2])
         a.uncertainty = [1., 2.]*pq.m