Index: clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
===================================================================
--- clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
+++ clang-tidy/abseil/DurationUnnecessaryConversionCheck.cpp
@@ -28,12 +28,27 @@
     std::string IntegerConversion =
         (llvm::Twine("::absl::ToInt64") + Scale).str();
 
+    auto factory_matcher = cxxConstructExpr(hasArgument(
+        0,
+        callExpr(callee(functionDecl(hasName(DurationFactory))),
+                 hasArgument(0, ignoringImpCasts(integerLiteral(equals(1)))))));
+
+    auto inverse_function_matcher = callExpr(
+        callee(functionDecl(hasAnyName(FloatConversion, IntegerConversion))),
+        hasArgument(0, expr().bind("arg")));
+
+    auto division_operator_matcher = cxxOperatorCallExpr(
+        hasOverloadedOperatorName("/"), hasArgument(0, expr().bind("arg")),
+        hasArgument(1, factory_matcher));
+
+    auto fdiv_matcher = callExpr(
+        callee(functionDecl(hasName("::absl::FDivDuration"))),
+        hasArgument(0, expr().bind("arg")), hasArgument(1, factory_matcher));
+
     Finder->addMatcher(
-        callExpr(
-            callee(functionDecl(hasName(DurationFactory))),
-            hasArgument(0, callExpr(callee(functionDecl(hasAnyName(
-                                        FloatConversion, IntegerConversion))),
-                                    hasArgument(0, expr().bind("arg")))))
+        callExpr(callee(functionDecl(hasName(DurationFactory))),
+                 hasArgument(0, anyOf(inverse_function_matcher,
+                                      division_operator_matcher, fdiv_matcher)))
             .bind("call"),
         this);
   }
@@ -47,7 +62,8 @@
   if (isInMacro(Result, OuterCall))
     return;
 
-  diag(OuterCall->getBeginLoc(), "remove unnecessary absl::Duration conversions")
+  diag(OuterCall->getBeginLoc(),
+       "remove unnecessary absl::Duration conversions")
       << FixItHint::CreateReplacement(
              OuterCall->getSourceRange(),
              tooling::fixit::getText(*Arg, *Result.Context));
Index: docs/clang-tidy/checks/abseil-duration-unnecessary-conversion.rst
===================================================================
--- docs/clang-tidy/checks/abseil-duration-unnecessary-conversion.rst
+++ docs/clang-tidy/checks/abseil-duration-unnecessary-conversion.rst
@@ -6,7 +6,7 @@
 Finds and fixes cases where ``absl::Duration`` values are being converted to
 numeric types and back again.
 
-Examples:
+Floating-point examples:
 
 .. code-block:: c++
 
@@ -17,6 +17,15 @@
   // Suggestion - Remove unnecessary conversions
   absl::Duration d2 = d1;
 
+  // Original - Division to convert to double and back again
+  absl::Duration d2 = absl::Seconds(absl::FDivDuration(d1, absl::Seconds(1)));
+
+  // Suggestion - Remove division and conversion
+  absl::Duration d2 = d1;
+
+Integer examples:
+
+.. code-block:: c++
 
   // Original - Conversion to integer and back again
   absl::Duration d1;
@@ -25,6 +34,12 @@
   // Suggestion - Remove unnecessary conversions
   absl::Duration d2 = d1;
 
+  // Original - Integer division followed by conversion
+  absl::Duration d2 = absl::Seconds(d1 / absl::Seconds(1));
+
+  // Suggestion - Remove division and conversion
+  absl::Duration d2 = d1;
+
 Note: Converting to an integer and back to an ``absl::Duration`` might be a
 truncating operation if the value is not aligned to the scale of conversion.
 In the rare case where this is the intended result, callers should use
Index: test/clang-tidy/Inputs/absl/time/time.h
===================================================================
--- test/clang-tidy/Inputs/absl/time/time.h
+++ test/clang-tidy/Inputs/absl/time/time.h
@@ -21,6 +21,7 @@
 template <typename T> Duration operator*(Duration lhs, T rhs);
 template <typename T> Duration operator*(T lhs, Duration rhs);
 template <typename T> Duration operator/(Duration lhs, T rhs);
+int64_t operator/(Duration lhs, Duration rhs);
 
 class Time{};
 
@@ -86,4 +87,6 @@
 inline Time operator-(Time lhs, Duration rhs);
 inline Duration operator-(Time lhs, Time rhs);
 
+double FDivDuration(Duration num, Duration den);
+
 }  // namespace absl
Index: test/clang-tidy/abseil-duration-unnecessary-conversion.cpp
===================================================================
--- test/clang-tidy/abseil-duration-unnecessary-conversion.cpp
+++ test/clang-tidy/abseil-duration-unnecessary-conversion.cpp
@@ -45,6 +45,44 @@
   // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
   // CHECK-FIXES: d1
 
+  d2 = absl::Hours(d1 / absl::Hours(1));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Minutes(d1 / absl::Minutes(1));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Seconds(d1 / absl::Seconds(1));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Milliseconds(d1 / absl::Milliseconds(1));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Microseconds(d1 / absl::Microseconds(1));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Nanoseconds(d1 / absl::Nanoseconds(1));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+
+  d2 = absl::Hours(absl::FDivDuration(d1, absl::Hours(1)));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Minutes(absl::FDivDuration(d1, absl::Minutes(1)));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Seconds(absl::FDivDuration(d1, absl::Seconds(1)));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Milliseconds(absl::FDivDuration(d1, absl::Milliseconds(1)));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Microseconds(absl::FDivDuration(d1, absl::Microseconds(1)));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+  d2 = absl::Nanoseconds(absl::FDivDuration(d1, absl::Nanoseconds(1)));
+  // CHECK-MESSAGES: [[@LINE-1]]:8: warning: remove unnecessary absl::Duration conversions [abseil-duration-unnecessary-conversion]
+  // CHECK-FIXES: d1
+
   // As macro argument
 #define PLUS_FIVE_S(x) x + absl::Seconds(5)
   d2 = PLUS_FIVE_S(absl::Seconds(absl::ToInt64Seconds(d1)));
@@ -66,4 +104,8 @@
   d2 = absl::Seconds(absl::ToDoubleMilliseconds(d1));
   d2 = absl::Seconds(4);
   int i = absl::ToInt64Milliseconds(d1);
+  d2 = absl::Hours(d1 / absl::Minutes(1));
+  d2 = absl::Seconds(d1 / absl::Seconds(30));
+  d2 = absl::Hours(absl::FDivDuration(d1, absl::Minutes(1)));
+  d2 = absl::Milliseconds(absl::FDivDuration(d1, absl::Milliseconds(20)));
 }