diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DayAssignment.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DayAssignment.java
index 11230d189..ef3513824 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DayAssignment.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DayAssignment.java
@@ -20,6 +20,8 @@
 
 package org.navalplanner.business.planner.entities;
 
+import static org.navalplanner.business.workingday.EffortDuration.zero;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -80,10 +82,11 @@ public abstract class DayAssignment extends BaseEntity {
         return start;
     }
 
-    public static int sum(Collection<? extends DayAssignment> assignments) {
-        int result = 0;
-        for (DayAssignment dayAssignment : assignments) {
-            result += dayAssignment.getHours();
+    public static EffortDuration sum(
+            Collection<? extends DayAssignment> assignments) {
+        EffortDuration result = zero();
+        for (DayAssignment each : assignments) {
+            result = result.plus(each.getDuration());
         }
         return result;
     }
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DerivedAllocation.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DerivedAllocation.java
index 3cdf86b30..1a9fcd9b9 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DerivedAllocation.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/DerivedAllocation.java
@@ -117,7 +117,7 @@ public class DerivedAllocation extends BaseEntity {
         }
 
         int getHours() {
-            return DayAssignment.sum(getUnorderedAssignments());
+            return DayAssignment.sum(getUnorderedAssignments()).roundToHours();
         }
 
         abstract void resetAssignmentsTo(
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java
index 56ba5a77f..29463c126 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/ResourceAllocation.java
@@ -836,7 +836,7 @@ public abstract class ResourceAllocation<T extends DayAssignment> extends
     }
 
     public int getAssignedHours() {
-        return DayAssignment.sum(getAssignments());
+        return DayAssignment.sum(getAssignments()).roundToHours();
     }
 
     protected abstract class DayAssignmentsState {
@@ -968,11 +968,12 @@ public abstract class ResourceAllocation<T extends DayAssignment> extends
     protected abstract DayAssignmentsState getDayAssignmentsState();
 
     public int getConsolidatedHours() {
-        return DayAssignment.sum(getConsolidatedAssignments());
+        return DayAssignment.sum(getConsolidatedAssignments()).roundToHours();
     }
 
     public int getNonConsolidatedHours() {
-        return DayAssignment.sum(getNonConsolidatedAssignments());
+        return DayAssignment.sum(getNonConsolidatedAssignments())
+                .roundToHours();
     }
 
     /**
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/allocationalgorithms/AllocatorForSpecifiedResourcesPerDayAndHours.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/allocationalgorithms/AllocatorForSpecifiedResourcesPerDayAndHours.java
index 406ce3853..7bfa56797 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/allocationalgorithms/AllocatorForSpecifiedResourcesPerDayAndHours.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/allocationalgorithms/AllocatorForSpecifiedResourcesPerDayAndHours.java
@@ -129,7 +129,7 @@ public abstract class AllocatorForSpecifiedResourcesPerDayAndHours {
                 resourcesPerDayModification, day, remaining);
         resultAssignments.get(resourcesPerDayModification).addAll(
                 newAssignments);
-        return DayAssignment.sum(newAssignments);
+        return DayAssignment.sum(newAssignments).roundToHours();
     }
 
     private static class HoursPerAllocation {