diff --git a/Utilities.py b/Utilities.py
new file mode 100644
index 0000000..ab12cf6
--- /dev/null
+++ b/Utilities.py
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+import pandas as pd
+
+
+def inflowsToCapacityFactors(inflows_df: pd.DataFrame, vres_df: pd.DataFrame, vresProfiles_df: pd.DataFrame) -> pd.DataFrame:
+    """
+    Convert inflows to capacity factors and concat them to vresProfiles_df.
+
+    - inflows_df: inflow data with inflows per generator (g) and representative period (rp).
+    - vres_df: contains generator technical data, including 'MaxProd'.
+    - vresProfiles_df: existing VRES profiles (indexed by rp, k, g).
+    """
+    df = inflows_df.copy()
+
+    # Prepare vres_df with ['g','MaxProd']
+    vres_tmp = vres_df.reset_index()[['g', 'MaxProd']]
+
+    if vres_tmp['g'].duplicated().any():
+        raise ValueError("Duplicated generator found in Power_VRES.")
+
+    maxProd = vres_tmp.set_index('g')['MaxProd'].astype(float)
+
+    # Join MaxProd into inflows
+    df = df.join(maxProd, on='g', how='left')
+
+    if df['MaxProd'].isna().any() or (df['MaxProd'] == 0).any():
+        raise ValueError("MaxProd is missing or zero for some generators in inflows.")
+
+    # Divide inflow value by MaxProd
+    df['value'] = df['value'] / df['MaxProd']
+
+    # Drop helper column
+    df = df.drop(columns=['MaxProd'])
+
+    return pd.concat([vresProfiles_df, df], axis=0)
+
+
+def capacityFactorsToInflows(vresProfiles_df: pd.DataFrame, vres_df: pd.DataFrame, inflows_df: pd.DataFrame, remove_Inflows_from_VRESProfiles_inplace: bool = False) -> pd.DataFrame:
+    """
+    Convert capacity factors in vresProfiles_df back to inflows.
+
+    - vresProfiles_df: DataFrame with capacity factors (indexed by rp, k, g).
+    - vres_df: DataFrame containing generator technical data, including 'MaxProd'.
+    - inflows_df: template inflows DataFrame (used to filter only those generators that are inflow-based).
+    - remove_Inflows_from_VRESProfiles_inplace: if True, remove inflow generators from the original vresProfiles_df.
+    """
+    df = vresProfiles_df.reset_index()
+
+    # Get list of inflow generators
+    inflow_generators = inflows_df.reset_index()['g'].unique()
+
+    # Prepare vres_df with ['g','MaxProd']
+    vres_tmp = vres_df.reset_index()[['g', 'MaxProd']]
+
+    if vres_tmp['g'].duplicated().any():
+        raise ValueError("Duplicated generator found in Power_VRES.")
+
+    maxProd = vres_tmp.set_index('g')['MaxProd'].astype(float)
+
+    # Keep only inflow generators
+    df = df[df['g'].isin(inflow_generators)]
+
+    # Join MaxProd
+    df = df.join(maxProd, on='g', how='left')
+
+    if df['MaxProd'].isna().any() or (df['MaxProd'] == 0).any():
+        raise ValueError("MaxProd is missing or zero for some generators in inflows.")
+
+    # Multiply capacity factor by MaxProd
+    df['value'] = df['value'] * df['MaxProd']
+
+    # Drop helper column
+    df = df.drop(columns=['MaxProd'])
+
+    # Remove inflow generators from vresProfiles_df after calculation if requested
+    if remove_Inflows_from_VRESProfiles_inplace:
+        mask = vresProfiles_df.index.get_level_values('g').isin(inflow_generators)
+        vresProfiles_df.drop(vresProfiles_df.index[mask], inplace=True)
+
+    return df.set_index(['rp', 'k', 'g']).sort_index(level="k")