diff --git a/co2calculator/calculate.py b/co2calculator/calculate.py
index 89a8d40..1cebcd7 100644
--- a/co2calculator/calculate.py
+++ b/co2calculator/calculate.py
@@ -232,6 +232,20 @@ def calc_co2_pedelec(weekly_distance):
     return co2e * weekly_distance
 
 
+def calc_co2_tram(weekly_distance):
+    """Calculate co2 emissions for commuting by pedelec
+
+    :param weekly_distance: distance in km per week
+    """
+    co2e = emission_factors.get(
+        {
+            "category": EmissionCategory.TRANSPORT,
+            "subcategory": TransportationMode.TRAM,
+        }
+    )
+    return co2e * weekly_distance
+
+
 def calc_co2_electricity(
     consumption: float, fuel_type: ElectricityFuel = None, energy_share: float = 1
 ) -> Kilogram:
@@ -484,15 +498,7 @@ def calc_co2_commuting(
     elif transportation_mode == TransportationMode.BICYCLE:
         weekly_co2e = calc_co2_bicycle(weekly_distance)
     elif transportation_mode == TransportationMode.TRAM:
-        fuel_type = BusFuel.ELECTRIC  # ok like that?
-        size = Size.AVERAGE
-        co2e = emission_factors.get(
-            EmissionCategory.TRANSPORT,
-            transportation_mode,
-            fuel_type=fuel_type,
-            size=size,
-        )
-        weekly_co2e = co2e * weekly_distance
+        weekly_co2e = calc_co2_tram(weekly_distance)
     else:
         raise ValueError(
             f"Transportation mode {transportation_mode} not found in database"
diff --git a/tests/functional/test_calculate.py b/tests/functional/test_calculate.py
index d61d174..db80145 100644
--- a/tests/functional/test_calculate.py
+++ b/tests/functional/test_calculate.py
@@ -150,8 +150,8 @@ class TestCalculateCommuting:
         "transportation_mode,expected_emissions",
         [
             pytest.param("car", 9.03, id="transportation_mode: 'car'"),
-            pytest.param("bus", 1.63, id="transportation_mode: 'bus'"),
-            pytest.param("train", 2.54, id="transportation_mode: 'train'"),
+            pytest.param("bus", 1.65, id="transportation_mode: 'bus'"),
+            pytest.param("train", 1.38, id="transportation_mode: 'train'"),
             pytest.param("bicycle", 0.38, id="transportation_mode: 'bicycle'"),
             pytest.param("pedelec", 0.63, id="transportation_mode: 'pedelec'"),
             pytest.param("motorbike", 4.77, id="transportation_mode: 'motorbike'"),