diff --git a/include/uml/Vector3.h b/include/uml/Vector3.h
index 3bc9bc3..06f6507 100644
--- a/include/uml/Vector3.h
+++ b/include/uml/Vector3.h
@@ -6,8 +6,7 @@
 
 namespace uml
 {
-    class Vector3 final
-    {
+    class Vector3 {
     public:
         float x = 0.f;
         float y = 0.f;
diff --git a/include/uml/Vector4.h b/include/uml/Vector4.h
new file mode 100644
index 0000000..82f5bff
--- /dev/null
+++ b/include/uml/Vector4.h
@@ -0,0 +1,42 @@
+//
+// Vector4.h
+//
+#pragma once
+
+#include <uml/Vector3.h>
+
+namespace uml
+{
+    class Vector4 final : public Vector3
+    {
+    public:
+        float w = 0.f;
+
+        Vector4(float x = 0.f, float y = 0.f, float z = 0.f, float w = 0.f) : Vector3(x, y, z), w(w) {}
+        Vector4() = default;
+
+        bool operator==(const Vector4& src) const;
+        bool operator!=(const Vector4& src) const;
+
+        Vector4& operator+=(const Vector4& v);
+        Vector4& operator-=(const Vector4& v);
+        Vector4& operator*=(float scalar);
+        Vector4& operator*=(const Vector4& v);
+        Vector4& operator/=(float scalar);
+        Vector4& operator/=(const Vector4& v);
+
+        [[nodiscard]] float Length() const;
+        [[nodiscard]] float LengthSqr() const;
+        [[nodiscard]] float Dot(const Vector4& vOther) const;
+        Vector4& Abs();
+        Vector4 operator-() const;
+        Vector4 operator+(const Vector4& v) const;
+        Vector4 operator-(const Vector4& v) const;
+        Vector4 operator*(float scalar) const;
+        Vector4 operator*(const Vector4& v) const;
+        Vector4 operator/(float scalar) const;
+        Vector4 operator/(const Vector4& v) const;
+
+        [[nodiscard]] float Sum() const;
+    };
+}
diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index 7b64eb9..80bd636 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -3,4 +3,5 @@ target_sources(uml PRIVATE
         matrix.cpp
         angles.cpp
         ProjectilePredictor.cpp
-        color.cpp)
\ No newline at end of file
+        color.cpp
+        Vector4.cpp)
\ No newline at end of file
diff --git a/source/Vector4.cpp b/source/Vector4.cpp
new file mode 100644
index 0000000..9d3c3f2
--- /dev/null
+++ b/source/Vector4.cpp
@@ -0,0 +1,123 @@
+//
+// Vector4.cpp
+//
+
+#include "Vector4.h"
+#include <cmath>
+
+namespace uml
+{
+    bool Vector4::operator==(const Vector4& src) const
+    {
+        return Vector3::operator==(src) && w == src.w;
+    }
+
+    bool Vector4::operator!=(const Vector4& src) const
+    {
+        return !(*this == src);
+    }
+
+    Vector4& Vector4::operator+=(const Vector4& v)
+    {
+        Vector3::operator+=(v);
+        w += v.w;
+        return *this;
+    }
+
+    Vector4& Vector4::operator-=(const Vector4& v)
+    {
+        Vector3::operator-=(v);
+        w -= v.w;
+        return *this;
+    }
+
+    Vector4& Vector4::operator*=(float scalar)
+    {
+        Vector3::operator*=(scalar);
+        w *= scalar;
+        return *this;
+    }
+
+    Vector4& Vector4::operator*=(const Vector4& v)
+    {
+        Vector3::operator*=(v);
+        w *= v.w;
+        return *this;
+    }
+
+    Vector4& Vector4::operator/=(float scalar)
+    {
+        Vector3::operator/=(scalar);
+        w /= scalar;
+        return *this;
+    }
+
+    Vector4& Vector4::operator/=(const Vector4& v)
+    {
+        Vector3::operator/=(v);
+        w /= v.w;
+        return *this;
+    }
+
+    float Vector4::Length() const
+    {
+        return std::sqrt(LengthSqr());
+    }
+
+    float Vector4::LengthSqr() const
+    {
+        return Vector3::LengthSqr() + w * w;
+    }
+
+    float Vector4::Dot(const Vector4& vOther) const
+    {
+        return Vector3::Dot(vOther) + w * vOther.w;
+    }
+
+    Vector4& Vector4::Abs()
+    {
+        Vector3::Abs();
+        w = std::abs(w);
+        return *this;
+    }
+
+    Vector4 Vector4::operator-() const
+    {
+        return Vector4(-x, -y, -z, -w);
+    }
+
+    Vector4 Vector4::operator+(const Vector4& v) const
+    {
+        return Vector4(x + v.x, y + v.y, z + v.z, w + v.w);
+    }
+
+    Vector4 Vector4::operator-(const Vector4& v) const
+    {
+        return Vector4(x - v.x, y - v.y, z - v.z, w - v.w);
+    }
+
+    Vector4 Vector4::operator*(float scalar) const
+    {
+        return Vector4(x * scalar, y * scalar, z * scalar, w * scalar);
+    }
+
+    Vector4 Vector4::operator*(const Vector4& v) const
+    {
+        return Vector4(x * v.x, y * v.y, z * v.z, w * v.w);
+    }
+
+    Vector4 Vector4::operator/(float scalar) const
+    {
+        return Vector4(x / scalar, y / scalar, z / scalar, w / scalar);
+    }
+
+    Vector4 Vector4::operator/(const Vector4& v) const
+    {
+        return Vector4(x / v.x, y / v.y, z / v.z, w / v.w);
+    }
+
+    float Vector4::Sum() const
+    {
+        return x + y + z + w;
+    }
+}