diff --git a/Modules/BrewRoom.Modules.Core/Models/Recipe.cs b/Modules/BrewRoom.Modules.Core/Models/Recipe.cs
index 9a7aeac..d7dd120 100644
--- a/Modules/BrewRoom.Modules.Core/Models/Recipe.cs
+++ b/Modules/BrewRoom.Modules.Core/Models/Recipe.cs
@@ -69,21 +69,11 @@ public Volume GetBrewLength()
         public decimal GetStartingGravity()
         {
             var result = 0M;
-            var gallons = _brewLength.ConvertTo(VolumeUnit.Gallons);
-            var extractionEfficiency = 1M;
-
             Parallel.ForEach(_grains, (grain) =>
                                           {
-                                              var points = grain.GravityContributionInPoints;
-                                              var pounds = grain.Weight.ConvertTo(MassUnit.Pounds);
-
-                                              result += points * extractionEfficiency;
-
-                                              //result += points / pounds.GetValue();
+                                              result += grain.GravityContributionInPoints;
                                           });
 
-            var gravityUnits = result * gallons.GetValue();
-
             return Math.Round(1M + result / 1000M, 3);
         }
 
@@ -109,7 +99,7 @@ private decimal GetHopIBUContribution(RecipeHop hop, decimal gravity)
 
         public object GetGuBuRatio()
         {
-            return GetStartingGravity() / GetIBU();
+            return Math.Round(GetStartingGravity() / GetIBU(), 2);
         }
 
         public IList<RecipeGrain>  GetFermentables()
diff --git a/Modules/BrewRoom.Modules.Core/Models/RecipeGrain.cs b/Modules/BrewRoom.Modules.Core/Models/RecipeGrain.cs
index a2ba827..afd1225 100644
--- a/Modules/BrewRoom.Modules.Core/Models/RecipeGrain.cs
+++ b/Modules/BrewRoom.Modules.Core/Models/RecipeGrain.cs
@@ -94,8 +94,7 @@ private decimal CalculateGravityContributionInPoints()
             var pounds = _weight.ConvertTo(MassUnit.Pounds).GetValue();
             var gallons = _recipe.GetBrewLength().ConvertTo(VolumeUnit.Gallons).GetValue();
 
-            //var calculatedGravityContribution = ((pounds * points) / gallons);
-            var calculatedGravityContribution = points * (pounds / gallons);
+            var calculatedGravityContribution = (pounds * points) / gallons;
             return Math.Round(calculatedGravityContribution, 3);
         }
 
diff --git a/Modules/Brewroom.Modules.Core.Spec/AddingIngredients.cs b/Modules/Brewroom.Modules.Core.Spec/AddingIngredients.cs
index e7809fa..4da0163 100644
--- a/Modules/Brewroom.Modules.Core.Spec/AddingIngredients.cs
+++ b/Modules/Brewroom.Modules.Core.Spec/AddingIngredients.cs
@@ -79,12 +79,12 @@ public void ShouldCalculateStartingGravityWithMultipleGrains()
             var grain3 = new Grain("Two-row");
 
             var recipe = new Recipe();
-            recipe.SetBrewLength(new Volume(5.5M, VolumeUnit.Gallons));
-            recipe.AddGrain(grain1, new Weight(1.87M, MassUnit.Pounds), 1.038M);
-            recipe.AddGrain(grain2, new Weight(1.46M, MassUnit.Pounds), 1.033M);
-            recipe.AddGrain(grain3, new Weight(5.92M, MassUnit.Pounds), 1.036M);
+            recipe.SetBrewLength(new Volume(3M, VolumeUnit.Gallons));
+            recipe.AddGrain(grain1, new Weight(1M, MassUnit.Pounds), 1.045M);
+            recipe.AddGrain(grain2, new Weight(1M, MassUnit.Pounds), 1.045M);
+            recipe.AddGrain(grain3, new Weight(1M, MassUnit.Pounds), 1.046M);
 
-            Assert.AreEqual(1.049M, recipe.GetStartingGravity());
+            Assert.AreEqual(1.045M, recipe.GetStartingGravity());
         }
 
         [Test]
@@ -98,7 +98,7 @@ public void ShouldBeAbleToClaculateTotalIBU()
         {
             var recipe = SimpleRecipe();
 
-            Assert.AreEqual(31.2M, recipe.GetIBU());
+            Assert.AreEqual(66M, recipe.GetIBU());
         }
 
         private static Recipe SimpleRecipe()
@@ -107,9 +107,9 @@ private static Recipe SimpleRecipe()
             var hop = new Hop("Saaz");
             var recipe = new Recipe();
 
-            recipe.SetBrewLength(6.Gallons());
+            recipe.SetBrewLength(1.Gallons());
             recipe.AddGrain(grain1, 1.Pound(), 1.045M);
-            recipe.AddHop(hop, new Weight(1/16M, MassUnit.Pounds), 60, 12.5M);
+            recipe.AddHop(hop, new Weight(10M, MassUnit.Grams), 60, 12.5M);
             return recipe;
         }
 
@@ -118,7 +118,7 @@ public void ShouldCalculateBuGuRatio()
         {
             var recipe = SimpleRecipe();
 
-            Assert.AreEqual(0.81M, recipe.GetGuBuRatio());
+            Assert.AreEqual(0.02M, recipe.GetGuBuRatio());
         }
 
         [Test]