diff --git a/include/boost/charconv/to_chars.hpp b/include/boost/charconv/to_chars.hpp
index e8ad328..957dea7 100644
--- a/include/boost/charconv/to_chars.hpp
+++ b/include/boost/charconv/to_chars.hpp
@@ -12,8 +12,9 @@
 #include <boost/charconv/detail/integer_conversion.hpp>
 #include <boost/charconv/detail/memcpy.hpp>
 #include <boost/charconv/detail/config.hpp>
-#include <boost/charconv/detail/dragonbox.hpp>
+#include <boost/charconv/detail/floff.hpp>
 #include <boost/charconv/config.hpp>
+#include <boost/charconv/chars_format.hpp>
 #include <type_traits>
 #include <array>
 #include <limits>
@@ -455,7 +456,7 @@ BOOST_CHARCONV_CONSTEXPR to_chars_result to_chars128(char* first, char* last, In
 // ---------------------------------------------------------------------------------------------------------------------
 // Floating Point Detail
 // ---------------------------------------------------------------------------------------------------------------------
-
+/*
 template <typename Float, typename FloatTraits>
 extern char* to_chars(typename FloatTraits::carrier_uint significand, int exponent, char* buffer) noexcept;
 
@@ -463,7 +464,7 @@ extern char* to_chars(typename FloatTraits::carrier_uint significand, int expone
 template <typename PolicyHolder, typename Float, typename FloatTraits>
 char* to_chars_n_impl(float_bits<Float, FloatTraits> br, char* buffer) noexcept 
 {
-    const auto exponent_bits = br.extract_exponent_bits();
+    const static auto exponent_bits = br.extract_exponent_bits();
     const auto s = br.remove_exponent_bits(exponent_bits);
 
     if (br.is_finite(exponent_bits)) 
@@ -537,7 +538,7 @@ void print_1_digit(std::uint32_t n, char* buffer) noexcept;
 void print_2_digits(std::uint32_t n, char* buffer) noexcept;
 
 void print_9_digits(std::uint32_t s32, int& exponent, char* buffer) noexcept;
-
+*/
 } // Namespace detail
 
 // integer overloads
@@ -599,9 +600,10 @@ BOOST_CHARCONV_CONSTEXPR to_chars_result to_chars(char* first, char* last, boost
 #endif
 // floating point overloads
 
-BOOST_CHARCONV_DECL to_chars_result to_chars( char* first, char* last, float value ) noexcept;
-BOOST_CHARCONV_DECL to_chars_result to_chars( char* first, char* last, double value ) noexcept;
-BOOST_CHARCONV_DECL to_chars_result to_chars( char* first, char* last, long double value ) noexcept;
+BOOST_CHARCONV_DECL to_chars_result to_chars(char* first, char* last, float value ) noexcept;
+BOOST_CHARCONV_DECL to_chars_result to_chars(char* first, char* last, double value, 
+                                             chars_format fmt = chars_format::general, int precision = -1 ) noexcept;
+BOOST_CHARCONV_DECL to_chars_result to_chars(char* first, char* last, long double value ) noexcept;
 
 } // namespace charconv
 } // namespace boost
diff --git a/src/to_chars.cpp b/src/to_chars.cpp
index 9e1889a..de7dec4 100644
--- a/src/to_chars.cpp
+++ b/src/to_chars.cpp
@@ -286,10 +286,26 @@ boost::charconv::to_chars_result boost::charconv::to_chars( char* first, char* l
     return { first + std::strlen(first), 0 };
 }
 
-boost::charconv::to_chars_result boost::charconv::to_chars( char* first, char* last, double value ) noexcept
+boost::charconv::to_chars_result boost::charconv::to_chars(char* first, char* last, double value, boost::charconv::chars_format fmt, int precision) noexcept
 {
-    std::snprintf( first, last - first, "%.*g", std::numeric_limits<double>::max_digits10, value );
-    return { first + std::strlen(first), 0 };
+    (void)fmt;
+
+    if (precision == -1)
+    {
+        precision = std::numeric_limits<double>::max_digits10;
+    }
+    if (precision > static_cast<std::ptrdiff_t>(last - first))
+    {
+        return { first, EOVERFLOW };
+    }
+    auto* ptr = jkj::floff::floff<jkj::floff::main_cache_full, jkj::floff::extended_cache_long>(value, precision, first);
+    while (*ptr == '0')
+    {
+        --ptr;
+    }
+    return { ptr, 0 };
+    //std::snprintf( first, last - first, "%.*g", std::numeric_limits<double>::max_digits10, value );
+    //return { first + std::strlen(first), 0 };
 }
 
 boost::charconv::to_chars_result boost::charconv::to_chars( char* first, char* last, long double value ) noexcept