diff --git a/src/writer/float_to_string.cc b/src/writer/float_to_string.cc
new file mode 100644
index 0000000..b179ed0
--- /dev/null
+++ b/src/writer/float_to_string.cc
@@ -0,0 +1,37 @@
+// Copyright 2020 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/writer/float_to_string.h"
+
+#include <limits>
+#include <sstream>
+
+namespace tint {
+namespace writer {
+
+std::string FloatToString(float f) {
+  std::stringstream ss;
+  ss.flags(ss.flags() | std::ios_base::showpoint | std::ios_base::fixed);
+  ss.precision(std::numeric_limits<float>::max_digits10);
+  ss << f;
+  auto str = ss.str();
+  while (str.length() >= 2 && str[str.size() - 1] == '0' &&
+         str[str.size() - 2] != '.') {
+    str.pop_back();
+  }
+  return str;
+}
+
+}  // namespace writer
+}  // namespace tint