diff --git a/py4DSTEM/preprocess/preprocess.py b/py4DSTEM/preprocess/preprocess.py
index c72240b4c..162b9a32d 100644
--- a/py4DSTEM/preprocess/preprocess.py
+++ b/py4DSTEM/preprocess/preprocess.py
@@ -649,7 +649,12 @@ def resample_data_diffraction(
         if not resampling_factor:
             resampling_factor = old_size[2] / output_size[0]
         if datacube.calibration.get_Q_pixel_size() is not None:
-            datacube.calibration.set_Q_pixel_size(datacube.calibration.get_Q_pixel_size() * resampling_factor)
+            datacube.calibration.set_Q_pixel_size(datacube.calibration.get_Q_pixel_size() / resampling_factor)
+
+        if not resampling_factor:
+            resampling_factor = old_size[2] / output_size[0]
+        if datacube.calibration.get_Q_pixel_size() is not None:
+            datacube.calibration.set_Q_pixel_size(datacube.calibration.get_Q_pixel_size() / resampling_factor)
 
     elif method == "bilinear":
         from scipy.ndimage import zoom