diff --git a/python/grass/jupyter/utils.py b/python/grass/jupyter/utils.py
index 95d4a0ce4d5..902ee3d6fcc 100644
--- a/python/grass/jupyter/utils.py
+++ b/python/grass/jupyter/utils.py
@@ -13,6 +13,7 @@
 """Utility functions wrapping existing processes in a suitable way"""
 
 from collections.abc import Mapping
+from io import StringIO
 import tempfile
 import json
 import os
@@ -92,28 +93,9 @@ def reproject_latlon(coord):
     :param coord: coordinates given as tuple (latitude, longitude)
     :return: reprojected coordinates (returned as tuple)
     """
-    # Prepare the input coordinate string
     coord_str = f"{coord[1]} {coord[0]}\n"
-
-    # Start the m.proj command
-    proc = gs.start_command(
-        "m.proj",
-        input="-",
-        flags="i",
-        separator=",",
-        stdin=gs.PIPE,
-        stdout=gs.PIPE,
-        stderr=gs.PIPE,
-    )
-
-    proc.stdin.write(gs.encode(coord_str))
-    proc.stdin.close()
-    proc.stdin = None
-    proj_output, _ = proc.communicate()
-
-    output = gs.decode(proj_output).splitlines()
-    east, north, elev = map(float, output[0].split(","))
-
+    output = Tools().m_proj(input=StringIO(coord_str), flags="i", separator=",").text
+    east, north, elev = map(float, output.splitlines()[0].split(","))
     return east, north, elev