diff --git a/fittrackee/migrations/versions/29_0f375c44e659_update_elevation_precision.py b/fittrackee/migrations/versions/29_0f375c44e659_update_elevation_precision.py
new file mode 100644
index 00000000..27c44560
--- /dev/null
+++ b/fittrackee/migrations/versions/29_0f375c44e659_update_elevation_precision.py
@@ -0,0 +1,78 @@
+"""update elevation precision
+
+Revision ID: 0f375c44e659
+Revises: a8cc0adfe1d3
+Create Date: 2022-12-14 18:01:54.662987
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '0f375c44e659'
+down_revision = 'a8cc0adfe1d3'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.alter_column(
+        'workouts',
+        'descent',
+        existing_type=sa.NUMERIC(precision=7, scale=2),
+        type_=sa.Numeric(precision=8, scale=3),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        'workouts',
+        'ascent',
+        existing_type=sa.NUMERIC(precision=7, scale=3),
+        type_=sa.Numeric(precision=8, scale=3),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        'workout_segments',
+        'descent',
+        existing_type=sa.NUMERIC(precision=7, scale=2),
+        type_=sa.Numeric(precision=8, scale=3),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        'workout_segments',
+        'ascent',
+        existing_type=sa.NUMERIC(precision=7, scale=3),
+        type_=sa.Numeric(precision=8, scale=3),
+        existing_nullable=True,
+    )
+
+
+def downgrade():
+    op.alter_column(
+        'workout_segments',
+        'ascent',
+        existing_type=sa.NUMERIC(precision=8, scale=3),
+        type_=sa.Numeric(precision=7, scale=2),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        'workout_segments',
+        'descent',
+        existing_type=sa.NUMERIC(precision=8, scale=3),
+        type_=sa.Numeric(precision=7, scale=2),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        'workouts',
+        'ascent',
+        existing_type=sa.NUMERIC(precision=8, scale=3),
+        type_=sa.Numeric(precision=7, scale=2),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        'workouts',
+        'descent',
+        existing_type=sa.NUMERIC(precision=8, scale=3),
+        type_=sa.Numeric(precision=7, scale=2),
+        existing_nullable=True,
+    )
diff --git a/fittrackee/workouts/models.py b/fittrackee/workouts/models.py
index fa488869..76252603 100644
--- a/fittrackee/workouts/models.py
+++ b/fittrackee/workouts/models.py
@@ -148,8 +148,8 @@ class Workout(BaseModel):
     distance = db.Column(db.Numeric(6, 3), nullable=True)  # kilometers
     min_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
     max_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
-    descent = db.Column(db.Numeric(7, 2), nullable=True)  # meters
-    ascent = db.Column(db.Numeric(7, 2), nullable=True)  # meters
+    descent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
+    ascent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
     max_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
     ave_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
     bounds = db.Column(postgresql.ARRAY(db.Float), nullable=True)
@@ -415,8 +415,8 @@ class WorkoutSegment(BaseModel):
     distance = db.Column(db.Numeric(6, 3), nullable=True)  # kilometers
     min_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
     max_alt = db.Column(db.Numeric(6, 2), nullable=True)  # meters
-    descent = db.Column(db.Numeric(7, 2), nullable=True)  # meters
-    ascent = db.Column(db.Numeric(7, 2), nullable=True)  # meters
+    descent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
+    ascent = db.Column(db.Numeric(8, 3), nullable=True)  # meters
     max_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
     ave_speed = db.Column(db.Numeric(6, 2), nullable=True)  # km/h
 
diff --git a/fittrackee_client/src/components/Workout/WorkoutEdition.vue b/fittrackee_client/src/components/Workout/WorkoutEdition.vue
index 81326d48..55c3bc2d 100644
--- a/fittrackee_client/src/components/Workout/WorkoutEdition.vue
+++ b/fittrackee_client/src/components/Workout/WorkoutEdition.vue
@@ -439,13 +439,13 @@
       workoutForm.workoutAscent === ''
         ? null
         : authUser.value.imperial_units
-        ? convertDistance(+workoutForm.workoutAscent, 'ft', 'm', 2)
+        ? convertDistance(+workoutForm.workoutAscent, 'ft', 'm', 3)
         : +workoutForm.workoutAscent
     payload.descent =
       workoutForm.workoutDescent === ''
         ? null
         : authUser.value.imperial_units
-        ? convertDistance(+workoutForm.workoutDescent, 'ft', 'm', 2)
+        ? convertDistance(+workoutForm.workoutDescent, 'ft', 'm', 3)
         : +workoutForm.workoutDescent
     if (
       (payload.ascent !== null && payload.descent === null) ||