Index: Ringtoets/Revetment/src/Ringtoets.Revetment.IO/Importers/WaveConditionsCalculationConfigurationImporter.cs
===================================================================
diff -u -rcc8b9d8e93577a236afec4dd16a25f89996241fa -rf63a76d0b9b432f146d9b6e6b67e5bf65963f66e
--- Ringtoets/Revetment/src/Ringtoets.Revetment.IO/Importers/WaveConditionsCalculationConfigurationImporter.cs	(.../WaveConditionsCalculationConfigurationImporter.cs)	(revision cc8b9d8e93577a236afec4dd16a25f89996241fa)
+++ Ringtoets/Revetment/src/Ringtoets.Revetment.IO/Importers/WaveConditionsCalculationConfigurationImporter.cs	(.../WaveConditionsCalculationConfigurationImporter.cs)	(revision f63a76d0b9b432f146d9b6e6b67e5bf65963f66e)
@@ -44,6 +44,7 @@
         where T : IWaveConditionsCalculation, new()
     {
         private readonly IEnumerable<HydraulicBoundaryLocation> hydraulicBoundaryLocations;
+        private readonly WaveConditionsInputStepSizeTypeConverter waveConditionsInputStepSizeConverter;
 
         /// <summary>
         /// Creates a new instance of <see cref="WaveConditionsCalculationConfigurationImporter{T}"/>.
@@ -64,6 +65,8 @@
                 throw new ArgumentNullException(nameof(hydraulicBoundaryLocations));
             }
             this.hydraulicBoundaryLocations = hydraulicBoundaryLocations;
+
+            waveConditionsInputStepSizeConverter = new WaveConditionsInputStepSizeTypeConverter();
         }
 
         protected override WaveConditionsCalculationConfigurationReader CreateCalculationConfigurationReader(string xmlFilePath)
@@ -80,6 +83,7 @@
 
             ReadHydraulicBoundaryLocation(readCalculation, waveConditionsCalculation);
             ReadBoundaries(readCalculation, waveConditionsCalculation);
+            ReadStepSize(readCalculation, waveConditionsCalculation);
 
             return waveConditionsCalculation;
         }
@@ -157,5 +161,13 @@
                     string.Format(Resources.WaveConditionsCalculationConfigurationImporter_ReadBoundaries_Lower_boundary_waterlevels_0_invalid, lowerBoundaryWaterLevels));
             }
         }
+
+        private void ReadStepSize(ReadWaveConditionsCalculation readCalculation, IWaveConditionsCalculation calculation)
+        {
+            if (readCalculation.StepSize != null)
+            {
+                calculation.InputParameters.StepSize = (WaveConditionsInputStepSize) waveConditionsInputStepSizeConverter.ConvertFrom(readCalculation.StepSize.ToString());
+            }
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/Importers/WaveConditionsCalculationConfigurationImporterTest.cs
===================================================================
diff -u -rcc8b9d8e93577a236afec4dd16a25f89996241fa -rf63a76d0b9b432f146d9b6e6b67e5bf65963f66e
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/Importers/WaveConditionsCalculationConfigurationImporterTest.cs	(.../WaveConditionsCalculationConfigurationImporterTest.cs)	(revision cc8b9d8e93577a236afec4dd16a25f89996241fa)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/Importers/WaveConditionsCalculationConfigurationImporterTest.cs	(.../WaveConditionsCalculationConfigurationImporterTest.cs)	(revision f63a76d0b9b432f146d9b6e6b67e5bf65963f66e)
@@ -150,7 +150,8 @@
                     UpperBoundaryRevetment = (RoundedDouble) 10,
                     LowerBoundaryRevetment = (RoundedDouble) 2,
                     UpperBoundaryWaterLevels = (RoundedDouble) 9,
-                    LowerBoundaryWaterLevels = (RoundedDouble) 4
+                    LowerBoundaryWaterLevels = (RoundedDouble) 4,
+                    StepSize = WaveConditionsInputStepSize.Half
                 }
             };
 
@@ -166,6 +167,7 @@
             Assert.AreEqual(expectedCalculation.InputParameters.LowerBoundaryRevetment, actualCalculation.InputParameters.LowerBoundaryRevetment);
             Assert.AreEqual(expectedCalculation.InputParameters.UpperBoundaryWaterLevels, actualCalculation.InputParameters.UpperBoundaryWaterLevels);
             Assert.AreEqual(expectedCalculation.InputParameters.LowerBoundaryWaterLevels, actualCalculation.InputParameters.LowerBoundaryWaterLevels);
+            Assert.AreEqual(expectedCalculation.InputParameters.StepSize, actualCalculation.InputParameters.StepSize);
         }
 
         private class SimpleWaveConditionsCalculation : Observable, IWaveConditionsCalculation