diff --git a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
--- a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
@@ -291,6 +291,24 @@
     ],
 )
 
+libc_support_library(
+    name = "__support_str_to_float",
+    hdrs = [
+        "src/__support/detailed_powers_of_ten.h",
+        "src/__support/high_precision_decimal.h",
+        "src/__support/str_to_float.h",
+    ],
+    deps = [
+        ":__support_builtin_wrappers",
+        ":__support_common",
+        ":__support_cpp_limits",
+        ":__support_ctype_utils",
+        ":__support_fputil_fp_bits",
+        ":__support_str_to_integer",
+        ":__support_uint128",
+    ],
+)
+
 libc_support_library(
     name = "__support_fputil_basic_operations",
     hdrs = ["src/__support/FPUtil/BasicOperations.h"],
@@ -1323,6 +1341,16 @@
     ],
 )
 
+libc_function(
+    name = "atof",
+    srcs = ["src/stdlib/atof.cpp"],
+    hdrs = ["src/stdlib/atof.h"],
+    deps = [
+        ":__support_common",
+        ":__support_str_to_float",
+    ],
+)
+
 libc_function(
     name = "bsearch",
     srcs = ["src/stdlib/bsearch.cpp"],
@@ -1381,6 +1409,36 @@
     ],
 )
 
+libc_function(
+    name = "strtof",
+    srcs = ["src/stdlib/strtof.cpp"],
+    hdrs = ["src/stdlib/strtof.h"],
+    deps = [
+        ":__support_common",
+        ":__support_str_to_float",
+    ],
+)
+
+libc_function(
+    name = "strtod",
+    srcs = ["src/stdlib/strtod.cpp"],
+    hdrs = ["src/stdlib/strtod.h"],
+    deps = [
+        ":__support_common",
+        ":__support_str_to_float",
+    ],
+)
+
+libc_function(
+    name = "strtold",
+    srcs = ["src/stdlib/strtold.cpp"],
+    hdrs = ["src/stdlib/strtold.h"],
+    deps = [
+        ":__support_common",
+        ":__support_str_to_float",
+    ],
+)
+
 ############################### string targets ###############################
 
 no_sanitize_features = [
diff --git a/utils/bazel/llvm-project-overlay/libc/test/src/stdlib/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/src/stdlib/BUILD.bazel
--- a/utils/bazel/llvm-project-overlay/libc/test/src/stdlib/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/src/stdlib/BUILD.bazel
@@ -45,6 +45,15 @@
     ],
 )
 
+libc_test(
+    name = "atof_test",
+    srcs = ["atof_test.cpp"],
+    deps = ["//libc:__support_fputil_fp_bits"],
+    libc_function_deps = [
+        "//libc:atof",
+    ],
+)
+
 libc_test(
     name = "bsearch_test",
     srcs = ["bsearch_test.cpp"],
@@ -105,3 +114,39 @@
         "//libc:strtoull",
     ],
 )
+
+libc_test(
+    name = "strtof_test",
+    srcs = ["strtof_test.cpp"],
+    deps = [
+        "//libc:__support_fputil_fp_bits",
+        "//libc/utils/testutils:libc_test_utils",
+    ],
+    libc_function_deps = [
+        "//libc:strtof",
+    ],
+)
+
+libc_test(
+    name = "strtod_test",
+    srcs = ["strtod_test.cpp"],
+    deps = [
+        "//libc:__support_fputil_fp_bits",
+        "//libc/utils/testutils:libc_test_utils",
+    ],
+    libc_function_deps = [
+        "//libc:strtod",
+    ],
+)
+
+libc_test(
+    name = "strtold_test",
+    srcs = ["strtold_test.cpp"],
+    deps = [
+        "//libc:__support_fputil_fp_bits",
+        "//libc:__support_uint128",
+    ],
+    libc_function_deps = [
+        "//libc:strtold",
+    ],
+)