diff --git a/src/org/parts3492/partslib/PARTsUnit.java b/src/org/parts3492/partslib/PARTsUnit.java
index 838495a..9b7248d 100644
--- a/src/org/parts3492/partslib/PARTsUnit.java
+++ b/src/org/parts3492/partslib/PARTsUnit.java
@@ -91,6 +91,8 @@ public double to(PARTsUnitType unitType) {
                         return this.value * Math.PI / 180.0;
                     case Angle:
                         return this.value;
+                    case Rotations:
+                        return this.value / 360.0;
                     default:
                         throw new RuntimeException(message);
                 }