diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index f45ab397e93693..71217e4e7059c4 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -778,7 +778,7 @@ are always available.  They are listed here in alphabetical order.
       single: NaN
       single: Infinity
 
-   Return a floating-point number constructed from a number or a string.
+   Return a floating-point number constructed from a string, number, or bytes-like object, if possible.
 
    Examples:
 
@@ -794,12 +794,26 @@ are always available.  They are listed here in alphabetical order.
       1000000.0
       >>> float('-Infinity')
       -inf
+      >>> float(b'3.2e2')
+      320.0
+      >>> float(bytearray(b'-2.5'))
+      -2.5
+      >>> float(memoryview(b'6.7'))
+      6.7
+      >>> import array
+      >>> float(array.array('b', [49, 50, 51]))
+      123.0
 
    If the argument is a string, it should contain a decimal number, optionally
    preceded by a sign, and optionally embedded in whitespace.  The optional
    sign may be ``'+'`` or ``'-'``; a ``'+'`` sign has no effect on the value
    produced.  The argument may also be a string representing a NaN
    (not-a-number), or positive or negative infinity.
+
+   If the argument is a bytes-like object, its contents are parsed as a decimal
+   string.  Therefore, the bytes-like object must contain a valid representation
+   of a floating-point number, otherwise :exc:`ValueError` is raised.
+
    More precisely, the input must conform to the :token:`~float:floatvalue`
    production rule in the following grammar, after leading and trailing
    whitespace characters are removed:
diff --git a/Objects/clinic/floatobject.c.h b/Objects/clinic/floatobject.c.h
index 8768555c909257..d1e46d43983640 100644
--- a/Objects/clinic/floatobject.c.h
+++ b/Objects/clinic/floatobject.c.h
@@ -210,7 +210,7 @@ PyDoc_STRVAR(float_new__doc__,
 "float(x=0, /)\n"
 "--\n"
 "\n"
-"Convert a string or number to a floating-point number, if possible.");
+"Convert a string, number, or bytes-like object to a float, if possible.");
 
 static PyObject *
 float_new_impl(PyTypeObject *type, PyObject *x);
@@ -353,4 +353,4 @@ float___format__(PyObject *self, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=5d7b0bf9e47ff997 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=de62deb586e0486a input=a9049054013a1b77]*/
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 17e6a729dcd83f..68e4c3c1dab5b1 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -1560,12 +1560,12 @@ float.__new__ as float_new
     x: object(c_default="NULL") = 0
     /
 
-Convert a string or number to a floating-point number, if possible.
+Convert a string, number, or bytes-like object to a float, if possible.
 [clinic start generated code]*/
 
 static PyObject *
 float_new_impl(PyTypeObject *type, PyObject *x)
-/*[clinic end generated code: output=ccf1e8dc460ba6ba input=55909f888aa0c8a6]*/
+/*[clinic end generated code: output=ccf1e8dc460ba6ba input=27eb1f7c62226a39]*/
 {
     if (type != &PyFloat_Type) {
         if (x == NULL) {