diff --git a/opm/parser/eclipse/Units/UnitSystem.cpp b/opm/parser/eclipse/Units/UnitSystem.cpp
index 3c67fda92..0778b430a 100644
--- a/opm/parser/eclipse/Units/UnitSystem.cpp
+++ b/opm/parser/eclipse/Units/UnitSystem.cpp
@@ -60,6 +60,9 @@ namespace {
         1, /* gas-oil ratio */
         1, /* oil-gas ratio */
         1, /* water cut */
+        1, /* gas formation volume factor */
+        1, /* oil formation volume factor */
+        1, /* water formation volume factor */
     };
 
     static const double from_metric[] = {
@@ -83,6 +86,9 @@ namespace {
         1, /* gas-oil ratio */
         1, /* oil-gas ratio */
         1, /* water cut */
+        1, /* gas formation volume factor */
+        1, /* oil formation volume factor */
+        1, /* water formation volume factor */
     };
 
     static constexpr const char* metric_names[] = {
@@ -106,6 +112,9 @@ namespace {
         "SM3/SM3",
         "SM3/SM3",
         "SM3/SM3",
+        "RM3/SM3", /* gas formation volume factor */
+        "RM3/SM3", /* oil formation volume factor */
+        "RM3/SM3", /* water formation volume factor */
     };
 
     static const double to_field[] = {
@@ -129,6 +138,9 @@ namespace {
         1, /* gas-oil ratio */
         1, /* oil-gas ratio */
         1, /* water cut */
+        1 / (Field::ReservoirVolume / Field::GasSurfaceVolume), /* gas formation volume factor */
+        1, /* oil formation volume factor */
+        1, /* water formation volume factor */
     };
 
     static const double from_field[] = {
@@ -152,6 +164,9 @@ namespace {
          1, /* gas-oil ratio */
          1, /* oil-gas ratio */
          1, /* water cut */
+         Field::ReservoirVolume / Field::GasSurfaceVolume, /* gas formation volume factor */
+         1, /* oil formation volume factor */
+         1, /* water formation volume factor */
     };
 
     static constexpr const char* field_names[] = {
@@ -175,6 +190,9 @@ namespace {
         "MSCF/STB",
         "STB/MSCF",
         "STB/STB",
+        "RB/MSCF", /* gas formation volume factor */
+        "RB/STB", /* oil formation volume factor */
+        "RB/STB", /* water formation volume factor */
     };
 
     static const double to_lab[] = {
@@ -198,6 +216,9 @@ namespace {
         1 / Lab::GasDissolutionFactor, /* gas-oil ratio */
         1 / Lab::OilDissolutionFactor, /* oil-gas ratio */
         1, /* water cut */
+        1, /* gas formation volume factor */
+        1, /* oil formation volume factor */
+        1, /* water formation volume factor */
     };
 
     static const double from_lab[] = {
@@ -221,6 +242,9 @@ namespace {
         Lab::GasDissolutionFactor,  /* gas-oil ratio */
         Lab::OilDissolutionFactor,  /* oil-gas ratio */
         1, /* water cut */
+        1, /* gas formation volume factor */
+        1, /* oil formation volume factor */
+        1, /* water formation volume factor */
     };
 
     static constexpr const char* lab_names[] = {
@@ -244,6 +268,9 @@ namespace {
         "SCC/SCC",
         "SCC/SCC",
         "SCC/SCC",
+        "RCC/SCC", /* gas formation volume factor */
+        "RCC/SCC", /* oil formation volume factor */
+        "RCC/SCC", /* water formation volume factor */
     };
 }
 
diff --git a/opm/parser/eclipse/Units/UnitSystem.hpp b/opm/parser/eclipse/Units/UnitSystem.hpp
index e7b17a192..389db7e9f 100644
--- a/opm/parser/eclipse/Units/UnitSystem.hpp
+++ b/opm/parser/eclipse/Units/UnitSystem.hpp
@@ -57,6 +57,9 @@ namespace Opm {
             gas_oil_ratio,
             oil_gas_ratio,
             water_cut,
+            gas_formation_volume_factor,
+            oil_formation_volume_factor,
+            water_formation_volume_factor,
         };
 
         UnitSystem(UnitType unit);