diff --git a/bpeng/oiltogas_savings_calculations.py b/bpeng/oiltogas_savings_calculations.py
new file mode 100644
index 0000000000000000000000000000000000000000..851f429aad0be116b59b7da8d3548b7980a5fcc0
--- /dev/null
+++ b/bpeng/oiltogas_savings_calculations.py
@@ -0,0 +1,66 @@
+"""Function to calculate $ savings for Oil to Gas conversion"""
+
+NO2_CONV = 0.138
+NO4_CONV = 0.145
+NO6_CONV = 0.150
+PROPANE_CONV = 0.0916
+NATURAL_GAS_CONV = 0.1
+ELECTRICITY_CONV = 0.003412
+
+
+def number2(gallons):
+    """Convert No2 oil gallons to MMBTU"""
+    return gallons * NO2_CONV
+
+
+def number4(gallons):
+    """Convert No4 oil gallons to MMBTU"""
+    return gallons * NO4_CONV
+
+
+def number6(gallons):
+    """Convert No6 oil gallons to MMBTU"""
+    return gallons * NO6_CONV
+
+
+def propane(gallons):
+    """Convert propane gallons to MMBTU"""
+    return gallons * PROPANE_CONV
+
+
+def natural_gas(therms):
+    """Convert natural gas therms to MMBTU"""
+    return therms * NATURAL_GAS_CONV
+
+
+def electricity(kwh):
+    """Convert electricity kWh to MMBTU"""
+    return kwh * ELECTRICITY_CONV
+
+
+# call function to convert gallons to mmbtu based on the type of oil
+def oil_gallons_mmbtu():
+    """Convert oil gallons to MMBTU"""
+    # inputs
+    oil_type = input('Enter type (No2, No4, No6)')
+    gallons = input('Enter annual oil consumption in gallons')
+    if oil_type == "No2":
+        oil_mmbtu = number2(gallons)
+    elif oil_type == "No4":
+        oil_mmbtu = number4(gallons)
+    else:
+        oil_mmbtu = number6(gallons)
+    return oil_mmbtu
+
+
+def savings(oil_mmbtu):
+    """ Calculate cost savings from oil to gas conversion"""
+    oil_costs = input("Enter the annual oil bill in $")
+    oilprice_per_mmbtu = oil_costs / oil_mmbtu
+    gasprice_per_therm = input("Enter the gas price in $ ($/therm)")
+    gasprice_per_mmbtu = gasprice_per_therm * 10
+    percentage_savings = ((oilprice_per_mmbtu - gasprice_per_mmbtu) / oilprice_per_mmbtu) * 100
+    cost_savings = oil_mmbtu * (oilprice_per_mmbtu - gasprice_per_mmbtu)
+    print('% Cost Savings:', percentage_savings)
+    print('$ Savings:', cost_savings)
+