diff --git a/ecologits/impacts/llm.py b/ecologits/impacts/llm.py
index f403d30a..52add327 100644
--- a/ecologits/impacts/llm.py
+++ b/ecologits/impacts/llm.py
@@ -4,7 +4,7 @@
 
 from ecologits.impacts.dag import DAG
 from ecologits.impacts.modeling import GWP, PE, ADPe, Embodied, Energy, Impacts, Usage
-from ecologits.range_value import RangeValue, ValueOrRange
+from ecologits.utils.range_value import RangeValue, ValueOrRange
 
 MODEL_QUANTIZATION_BITS = 4
 
diff --git a/ecologits/impacts/modeling.py b/ecologits/impacts/modeling.py
index 2d35a36b..af114be1 100644
--- a/ecologits/impacts/modeling.py
+++ b/ecologits/impacts/modeling.py
@@ -3,7 +3,7 @@
 from pydantic import BaseModel
 
 from ecologits.exceptions import ModelingError
-from ecologits.range_value import ValueOrRange
+from ecologits.utils.range_value import ValueOrRange
 
 
 @total_ordering
diff --git a/ecologits/model_repository.py b/ecologits/model_repository.py
index 87ffba8d..d4c1bd36 100644
--- a/ecologits/model_repository.py
+++ b/ecologits/model_repository.py
@@ -5,7 +5,7 @@
 
 from pydantic import BaseModel
 
-from ecologits.range_value import ValueOrRange
+from ecologits.utils.range_value import ValueOrRange
 
 
 class Providers(Enum):
diff --git a/ecologits/utils/__init__.py b/ecologits/utils/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/ecologits/range_value.py b/ecologits/utils/range_value.py
similarity index 93%
rename from ecologits/range_value.py
rename to ecologits/utils/range_value.py
index 9d385fbc..3229cec9 100644
--- a/ecologits/range_value.py
+++ b/ecologits/utils/range_value.py
@@ -63,5 +63,10 @@ def __gt__(self, other: Any) -> bool:
         else:
             return self.min > other
 
+    def __format__(self,format_spec:str)-> str:
+        return f"{format(self.min,format_spec)} to {format(self.max,format_spec)}"
+
+
+
 
 ValueOrRange = Union[int, float, RangeValue]
diff --git a/tests/test_modeling_impacts.py b/tests/test_modeling_impacts.py
index 3205bfc4..59b9bf12 100644
--- a/tests/test_modeling_impacts.py
+++ b/tests/test_modeling_impacts.py
@@ -4,7 +4,7 @@
 
 from ecologits.impacts.modeling import Impact, Energy, GWP, ADPe, PE
 from ecologits.exceptions import ModelingError
-from ecologits.range_value import RangeValue
+from ecologits.utils.range_value import RangeValue
 
 
 impact_config = dict(
diff --git a/tests/test_range_value.py b/tests/test_range_value.py
new file mode 100644
index 00000000..55c02a18
--- /dev/null
+++ b/tests/test_range_value.py
@@ -0,0 +1,10 @@
+from ecologits.utils.range_value import RangeValue
+
+
+def test_range_formats_ok():
+    
+    range = RangeValue(min =0.00000006, max=0.00008)
+    
+    expected = f"{range.min:.2f} to {range.max:.2f}"
+
+    assert f"{range:.2f}" == expected
\ No newline at end of file