diff --git a/headers/vmath.hpp/vmath.hpp b/headers/vmath.hpp/vmath.hpp
index 770ce34..5353745 100644
--- a/headers/vmath.hpp/vmath.hpp
+++ b/headers/vmath.hpp/vmath.hpp
@@ -9,5 +9,7 @@
 #include "vmath_fun.hpp"
 #include "vmath_mat.hpp"
 #include "vmath_mat_fun.hpp"
+#include "vmath_mat_ext.hpp"
 #include "vmath_vec.hpp"
 #include "vmath_vec_fun.hpp"
+#include "vmath_vec_ext.hpp"
diff --git a/headers/vmath.hpp/vmath_ext.hpp b/headers/vmath.hpp/vmath_ext.hpp
new file mode 100644
index 0000000..1dd9b72
--- /dev/null
+++ b/headers/vmath.hpp/vmath_ext.hpp
@@ -0,0 +1,19 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/vmath.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include "vmath_fwd.hpp"
+
+#include "vmath_fun.hpp"
+
+namespace vmath_hpp
+{
+    template < typename To, typename From >
+    constexpr To cast_to(From x) noexcept {
+        return static_cast<To>(x);
+    }
+}
diff --git a/headers/vmath.hpp/vmath_mat_ext.hpp b/headers/vmath.hpp/vmath_mat_ext.hpp
index bd431d7..11974e7 100644
--- a/headers/vmath.hpp/vmath_mat_ext.hpp
+++ b/headers/vmath.hpp/vmath_mat_ext.hpp
@@ -8,10 +8,24 @@
 
 #include "vmath_fwd.hpp"
 
+#include "vmath_ext.hpp"
 #include "vmath_fun.hpp"
+
+#include "vmath_vec.hpp"
+#include "vmath_vec_fun.hpp"
+#include "vmath_vec_ext.hpp"
+
 #include "vmath_mat.hpp"
 #include "vmath_mat_fun.hpp"
 
+namespace vmath_hpp
+{
+    template < typename To, typename From, std::size_t Size >
+    constexpr mat<To, Size> cast_to(const mat<From, Size>& xs) {
+        return detail::map([](const vec<From, Size>& x){ return cast_to<To>(x); }, xs);
+    }
+}
+
 namespace vmath_hpp
 {
     // identity
diff --git a/headers/vmath.hpp/vmath_vec_ext.hpp b/headers/vmath.hpp/vmath_vec_ext.hpp
new file mode 100644
index 0000000..31095bc
--- /dev/null
+++ b/headers/vmath.hpp/vmath_vec_ext.hpp
@@ -0,0 +1,23 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/vmath.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include "vmath_fwd.hpp"
+
+#include "vmath_ext.hpp"
+#include "vmath_fun.hpp"
+
+#include "vmath_vec.hpp"
+#include "vmath_vec_fun.hpp"
+
+namespace vmath_hpp
+{
+    template < typename To, typename From, std::size_t Size >
+    constexpr vec<To, Size> cast_to(const vec<From, Size>& xs) {
+        return detail::map([](From x){ return cast_to<To>(x); }, xs);
+    }
+}
diff --git a/untests/vmath_ext_tests.cpp b/untests/vmath_ext_tests.cpp
new file mode 100644
index 0000000..8a30350
--- /dev/null
+++ b/untests/vmath_ext_tests.cpp
@@ -0,0 +1,26 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/vmath.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include <vmath.hpp/vmath_ext.hpp>
+
+#define CATCH_CONFIG_FAST_COMPILE
+#include <catch2/catch.hpp>
+
+#include "vmath_tests.hpp"
+
+namespace
+{
+    using namespace vmath_hpp;
+    using namespace vmath_tests;
+}
+
+TEST_CASE("vmath/ext") {
+    SECTION("cast_to") {
+        constexpr auto i = cast_to<int>(1.5f);
+        STATIC_REQUIRE(i == 1);
+        STATIC_REQUIRE(std::is_same_v<decltype(i), const int>);
+    }
+}
diff --git a/untests/vmath_mat_ext_tests.cpp b/untests/vmath_mat_ext_tests.cpp
index 0c7b716..403ee2f 100644
--- a/untests/vmath_mat_ext_tests.cpp
+++ b/untests/vmath_mat_ext_tests.cpp
@@ -18,6 +18,12 @@ namespace
 }
 
 TEST_CASE("vmath/mat_ext") {
+    SECTION("cast_to") {
+        constexpr auto m = cast_to<int>(mat2f{1.5f});
+        STATIC_REQUIRE(m == mat2i(1));
+        STATIC_REQUIRE(std::is_same_v<decltype(m)::row_type, vec2i>);
+    }
+
     SECTION("identity") {
         STATIC_REQUIRE(vec4f(2.f,3.f,4.f,1.f) * identity<float>() == approx4(2.f,3.f,4.f,1.f));
         STATIC_REQUIRE(vec4f(2.f,3.f,4.f,1.f) * identity<float>() == approx4(2.f,3.f,4.f,1.f));
diff --git a/untests/vmath_vec_ext_tests.cpp b/untests/vmath_vec_ext_tests.cpp
new file mode 100644
index 0000000..fa1f794
--- /dev/null
+++ b/untests/vmath_vec_ext_tests.cpp
@@ -0,0 +1,26 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/vmath.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include <vmath.hpp/vmath_vec_ext.hpp>
+
+#define CATCH_CONFIG_FAST_COMPILE
+#include <catch2/catch.hpp>
+
+#include "vmath_tests.hpp"
+
+namespace
+{
+    using namespace vmath_hpp;
+    using namespace vmath_tests;
+}
+
+TEST_CASE("vmath/vec_ext") {
+    SECTION("cast_to") {
+        constexpr auto v = cast_to<int>(vec2f{1.5f});
+        STATIC_REQUIRE(v == vec2i(1));
+        STATIC_REQUIRE(std::is_same_v<decltype(v)::value_type, int>);
+    }
+}