diff --git a/NEOSPlus/Quantity/Joules.cs b/NEOSPlus/Quantity/Joules.cs
index 8b13789..5b1dc56 100644
--- a/NEOSPlus/Quantity/Joules.cs
+++ b/NEOSPlus/Quantity/Joules.cs
@@ -1 +1,145 @@
+using System;
+using QuantityX;
+
+namespace NEOSPlus.Quantity
+{
+    public readonly struct Joule : IQuantitySI<Joule>, IQuantitySI, IQuantity<Joule>, IQuantity, IComparable<Joule>, IEquatable<Joule>
+    {
+        public readonly double BaseValue;
+
+        public static readonly Unit<Joule> Joules = new UnitSI<Joule>(0, "J", "joule");
+
+        double IQuantity.BaseValue => BaseValue;
+
+        public double SIPower => 1.0;
+
+        public Unit<Joule> DefaultUnit => Joules;
+
+        public Joule(double baseValue = 0.0)
+        {
+            this = default(Joule);
+            BaseValue = baseValue;
+        }
+
+        public bool Equals(Joule other)
+        {
+            return BaseValue == other.BaseValue;
+        }
+
+        public int CompareTo(Joule other)
+        {
+            return BaseValue.CompareTo(other.BaseValue);
+        }
+
+        public string[] GetShortBaseNames()
+        {
+            return new string[] { "J" };
+        }
+
+        public string[] GetLongBaseNames()
+        {
+            return new string[] { "joules", "joule" };
+        }
+
+        public IUnit[] GetCommonSIUnits()
+        {
+            return new IUnit[]
+            {
+                SI<Joule>.Pico,
+                SI<Joule>.Nano,
+                SI<Joule>.Micro,
+                SI<Joule>.Milli,
+                Joules,
+                SI<Joule>.Kilo,
+                SI<Joule>.Mega,
+                SI<Joule>.Giga,
+                SI<Joule>.Tera,
+                SI<Joule>.Peta
+            };
+        }
+
+        public IUnit[] GetExludedSIUnits()
+        {
+            return new IUnit[]
+            {
+                SI<Joule>.Yotta,
+                SI<Joule>.Zetta,
+                SI<Joule>.Exa,
+                SI<Joule>.Deca,
+                SI<Joule>.Hecto,
+                SI<Joule>.Centi,
+                SI<Joule>.Deci,
+                SI<Joule>.Yocto,
+                SI<Joule>.Zepto,
+                SI<Joule>.Atto,
+                SI<Joule>.Femto
+            };
+        }
+
+        public Joule New(double baseVal)
+        {
+            return new Joule(baseVal);
+        }
+
+        public Joule Add(Joule q)
+        {
+            return new Joule(BaseValue + q.BaseValue);
+        }
+
+        public Joule Subtract(Joule q)
+        {
+            return new Joule(BaseValue - q.BaseValue);
+        }
+
+        public Joule Multiply(double n)
+        {
+            return new Joule(BaseValue * n);
+        }
+
+        public Joule Divide(double n)
+        {
+            return new Joule(BaseValue / n);
+        }
+
+        public Ratio Divide(Joule q)
+        {
+            return new Ratio(BaseValue / q.BaseValue);
+        }
+
+        public static Joule operator +(Joule a, Joule b)
+        {
+            return a.Add(b);
+        }
+
+        public static Joule operator -(Joule a, Joule b)
+        {
+            return a.Subtract(b);
+        }
+
+        public static Joule operator *(Joule a, double n)
+        {
+            return a.Multiply(n);
+        }
+
+        public static Joule operator /(Joule a, double n)
+        {
+            return a.Divide(n);
+        }
+
+        public static Ratio operator /(Joule a, Joule b)
+        {
+            return a.Divide(b);
+        }
+
+        public static Joule operator -(Joule a)
+        {
+            return a.Multiply(-1.0);
+        }
+
+        public override string ToString()
+        {
+            return this.FormatAuto();
+        }
+    }
+}