diff --git a/include/boost/core/bit.hpp b/include/boost/core/bit.hpp
index 68a39be..a6147e4 100644
--- a/include/boost/core/bit.hpp
+++ b/include/boost/core/bit.hpp
@@ -43,6 +43,16 @@
 # define BOOST_CORE_HAS_BUILTIN_ISCONSTEVAL
 #endif
 
+#if defined(__has_builtin)
+# if __has_builtin(__builtin_bit_cast)
+#  define BOOST_CORE_HAS_BUILTIN_BIT_CAST
+# endif
+#endif
+
+#if defined(BOOST_MSVC) && BOOST_MSVC >= 1926
+#  define BOOST_CORE_HAS_BUILTIN_BIT_CAST
+#endif
+
 namespace boost
 {
 namespace core
@@ -50,6 +60,16 @@ namespace core
 
 // bit_cast
 
+#if defined(BOOST_CORE_HAS_BUILTIN_BIT_CAST)
+
+template<class To, class From>
+BOOST_CONSTEXPR To bit_cast( From const & from ) BOOST_NOEXCEPT
+{
+    return __builtin_bit_cast( To, from );
+}
+
+#else
+
 template<class To, class From>
 To bit_cast( From const & from ) BOOST_NOEXCEPT
 {
@@ -60,6 +80,8 @@ To bit_cast( From const & from ) BOOST_NOEXCEPT
     return to;
 }
 
+#endif
+
 // countl
 
 #if defined(__GNUC__) || defined(__clang__)
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 73818ef..5f79241 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -304,6 +304,7 @@ run bit_byteswap_test.cpp
 compile-fail bit_width_fail.cpp
   : <warnings>off ;
 
+compile bit_cast_test_cx.cpp ;
 compile bit_rotate_test_cx.cpp ;
 compile bit_countr_test_cx.cpp ;
 compile bit_countl_test_cx.cpp ;
diff --git a/test/bit_cast_test_cx.cpp b/test/bit_cast_test_cx.cpp
new file mode 100644
index 0000000..33a2b74
--- /dev/null
+++ b/test/bit_cast_test_cx.cpp
@@ -0,0 +1,24 @@
+// constexpr test for boost/core/bit.hpp (bit_cast)
+//
+// Copyright 2023 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(BOOST_NO_CXX11_CONSTEXPR)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_NO_CXX11_CONSTEXPR is defined" )
+
+#else
+
+#include <boost/core/bit.hpp>
+#include <boost/cstdint.hpp>
+
+#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
+
+STATIC_ASSERT( boost::core::bit_cast<boost::uint32_t>( 1.0f ) == 0x3F800000u );
+STATIC_ASSERT( boost::core::bit_cast<boost::uint64_t>( 1.0 ) == 0x3FF0000000000000ull );
+
+#endif