diff --git a/app/scodoc/TrivialFormulator.py b/app/scodoc/TrivialFormulator.py
index 5b7020a8f..20004c87a 100644
--- a/app/scodoc/TrivialFormulator.py
+++ b/app/scodoc/TrivialFormulator.py
@@ -10,6 +10,7 @@
 """
 import html
 import re
+import app.scodoc.sco_utils as scu
 
 # re validant dd/mm/yyyy
 DMY_REGEXP = re.compile(
@@ -297,6 +298,20 @@ class TF(object):
                             % (val, field, descr["max_value"])
                         )
                         ok = 0
+                    if typ[:3] == "int":
+                        if not (scu.DB_MIN_INT <= self.values[field] <= scu.DB_MAX_INT):
+                            msg.append(
+                                f"Le champ '{field}' est a une valeur hors limite"
+                            )
+                            ok = 0
+                    elif typ == "float" or typ == "real":
+                        if not (
+                            scu.DB_MIN_FLOAT <= self.values[field] <= scu.DB_MAX_FLOAT
+                        ):
+                            msg.append(
+                                f"Le champ '{field}' est a une valeur hors limite"
+                            )
+                            ok = 0
                 if ok and (typ[:3] == "str") and "max_length" in descr:
                     if len(self.values[field]) > descr["max_length"]:
                         msg.append(
diff --git a/app/scodoc/sco_edit_module.py b/app/scodoc/sco_edit_module.py
index 2e8c9ca71..ef4cc3aa4 100644
--- a/app/scodoc/sco_edit_module.py
+++ b/app/scodoc/sco_edit_module.py
@@ -466,6 +466,7 @@ def module_edit(
                 "title": "Heures cours :",
                 "size": 4,
                 "type": "float",
+                "min_value": 0,
                 "explanation": "nombre d'heures de cours (optionnel)",
             },
         ),
@@ -475,6 +476,7 @@ def module_edit(
                 "title": "Heures de TD :",
                 "size": 4,
                 "type": "float",
+                "min_value": 0,
                 "explanation": "nombre d'heures de Travaux Dirigés (optionnel)",
             },
         ),
@@ -484,6 +486,7 @@ def module_edit(
                 "title": "Heures de TP :",
                 "size": 4,
                 "type": "float",
+                "min_value": 0,
                 "explanation": "nombre d'heures de Travaux Pratiques (optionnel)",
             },
         ),
diff --git a/app/scodoc/sco_edit_ue.py b/app/scodoc/sco_edit_ue.py
index 4cc745027..767049a30 100644
--- a/app/scodoc/sco_edit_ue.py
+++ b/app/scodoc/sco_edit_ue.py
@@ -352,6 +352,8 @@ def ue_edit(ue_id=None, create=False, formation_id=None, default_semestre_idx=No
             {
                 "size": 4,
                 "type": "float",
+                "min_value": 0,
+                "max_value": 1000,
                 "title": "ECTS",
                 "explanation": "nombre de crédits ECTS (indiquer 0 si UE bonus)",
                 "allow_null": not is_apc,  # ects requis en APC
@@ -365,6 +367,7 @@ def ue_edit(ue_id=None, create=False, formation_id=None, default_semestre_idx=No
                 {
                     "size": 4,
                     "type": "float",
+                    "min_value": 0,
                     "title": "Coef. RCUE",
                     "explanation": """pondération utilisée pour le calcul de la moyenne du RCUE. Laisser à 1, sauf si votre établissement a explicitement décidé de pondérations.
                     """,
@@ -381,6 +384,7 @@ def ue_edit(ue_id=None, create=False, formation_id=None, default_semestre_idx=No
                 {
                     "size": 4,
                     "type": "float",
+                    "min_value": 0,
                     "title": "Coefficient",
                     "explanation": """les coefficients d'UE ne sont utilisés que
                     lorsque l'option <em>Utiliser les coefficients d'UE pour calculer
diff --git a/app/scodoc/sco_evaluation_edit.py b/app/scodoc/sco_evaluation_edit.py
index c7d3402cb..b4b6ba38b 100644
--- a/app/scodoc/sco_evaluation_edit.py
+++ b/app/scodoc/sco_evaluation_edit.py
@@ -209,7 +209,7 @@ def evaluation_create_form(
                 "coefficient",
                 {
                     "size": 6,
-                    "type": "float",
+                    "type": "float",  # peut être négatif (!)
                     "explanation": "coef. dans le module (choisi librement par l'enseignant, non utilisé pour rattrapage et 2ème session)",
                     "allow_null": False,
                 },
diff --git a/app/scodoc/sco_ue_external.py b/app/scodoc/sco_ue_external.py
index 825982286..21f9dadd2 100644
--- a/app/scodoc/sco_ue_external.py
+++ b/app/scodoc/sco_ue_external.py
@@ -318,6 +318,8 @@ def external_ue_create_form(formsemestre_id: int, etudid: int):
                 {
                     "size": 4,
                     "type": "float",
+                    "min_value": 0,
+                    "max_value": 1000,
                     "title": "ECTS",
                     "explanation": "nombre de crédits ECTS",
                     "dom_id": "tf_extue_ects",
diff --git a/app/scodoc/sco_utils.py b/app/scodoc/sco_utils.py
index 9e7223749..247788b14 100644
--- a/app/scodoc/sco_utils.py
+++ b/app/scodoc/sco_utils.py
@@ -655,6 +655,13 @@ def to_bool(x) -> bool:
     return bool(x)
 
 
+# Min/Max values for numbers stored in database:
+DB_MIN_FLOAT = -1e30
+DB_MAX_FLOAT = 1e30
+DB_MIN_INT = -(1 << 31)
+DB_MAX_INT = (1 << 31) - 1
+
+
 def bul_filename_old(sem: dict, etud: dict, format):
     """Build a filename for this bulletin"""
     dt = time.strftime("%Y-%m-%d")
diff --git a/app/views/scolar.py b/app/views/scolar.py
index 9b6388a7e..e1f3da345 100644
--- a/app/views/scolar.py
+++ b/app/views/scolar.py
@@ -1488,6 +1488,8 @@ def _etudident_create_or_edit_form(edit):
                 "size": 5,
                 "title": "Année bac",
                 "type": "int",
+                "min_value": 1945,
+                "max_value": 2100,
                 "explanation": "année obtention du bac",
             },
         ),