diff --git a/src/LocalDateRange.php b/src/LocalDateRange.php
index a239ddd..5a30a28 100644
--- a/src/LocalDateRange.php
+++ b/src/LocalDateRange.php
@@ -228,6 +228,16 @@ public function count() : int
         return $this->end->toEpochDay() - $this->start->toEpochDay() + 1;
     }
 
+    /**
+     * Returns Duration of this range
+     *
+     * @return Duration
+     */
+    public function toDuration(): Duration
+    {
+        return Duration::ofDays($this->count());
+    }
+
     /**
      * Serializes as a string using {@see LocalDateRange::__toString()}.
      */
diff --git a/src/YearMonthRange.php b/src/YearMonthRange.php
index e082d39..4322fd7 100644
--- a/src/YearMonthRange.php
+++ b/src/YearMonthRange.php
@@ -174,6 +174,16 @@ public function toLocalDateRange(): LocalDateRange
         );
     }
 
+    /**
+     * Returns Duration of this range
+     *
+     * @return Duration
+     */
+    public function toDuration(): Duration
+    {
+        return $this->toLocalDateRange()->toDuration();
+    }
+
     /**
      * Serializes as a string using {@see YearMonthRange::__toString()}.
      */
diff --git a/tests/LocalDateRangeTest.php b/tests/LocalDateRangeTest.php
index 64a39e0..0571d07 100644
--- a/tests/LocalDateRangeTest.php
+++ b/tests/LocalDateRangeTest.php
@@ -5,6 +5,7 @@
 namespace Brick\DateTime\Tests;
 
 use Brick\DateTime\DateTimeException;
+use Brick\DateTime\Duration;
 use Brick\DateTime\LocalDate;
 use Brick\DateTime\LocalDateRange;
 use Brick\DateTime\Parser\DateTimeParseException;
@@ -172,6 +173,16 @@ public function testCount(string $range, int $count): void
         $this->assertCount($count, LocalDateRange::parse($range));
     }
 
+    /**
+     * @dataProvider providerCount
+     */
+    public function testToDuration(string $rangeString, int $expectedDaysCount): void
+    {
+        $expectedSeconds = $expectedDaysCount * 60 * 60 * 24;
+        $rangeObject = LocalDateRange::parse($rangeString);
+        $this->assertDurationIs($expectedSeconds, 0, $rangeObject->toDuration());
+    }
+
     public function providerCount() : array
     {
         return [
diff --git a/tests/YearMonthRangeTest.php b/tests/YearMonthRangeTest.php
index 7b60402..6283799 100644
--- a/tests/YearMonthRangeTest.php
+++ b/tests/YearMonthRangeTest.php
@@ -198,6 +198,29 @@ public function providerToLocalDateRange(): array
         ];
     }
 
+    /**
+     * @dataProvider providerToDuration
+     */
+    public function testToDuration(string $range, int $expectedDaysCount): void
+    {
+        $actualDuration = YearMonthRange::parse($range)->toDuration();
+        $expectedSeconds = $expectedDaysCount * 60 * 60 * 24;
+        $this->assertDurationIs($expectedSeconds, 0, $actualDuration);
+    }
+
+    public function providerToDuration(): array
+    {
+        return [
+            ['1900-01/1900-12', 365],
+            ['1900-05/1901-04', 365],
+            ['1904-01/1904-12', 366],
+            ['1900-02/1900-02', 28],
+            ['2000-01/2000-02', 31 + 29],
+            ['2001-01/2001-02', 31 + 28],
+            ['1901-01/3000-12', 401767],
+        ];
+    }
+
     public function testJsonSerialize(): void
     {
         $this->assertSame(json_encode('2008-12/2011-01'), json_encode(YearMonthRange::of(