diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Round.php b/src/PhpSpreadsheet/Calculation/MathTrig/Round.php
index 0bb4ba2dc6..d2aa1c0b13 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Round.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Round.php
@@ -72,7 +72,7 @@ public static function up($number, $digits): array|string|float
             if ($digitsPlus1 < 0) {
                 return round($number - 0.5 * 0.1 ** $digits, $digits, PHP_ROUND_HALF_DOWN);
             }
-            $result = sprintf("%.{$digitsPlus1}f", $number - 0.5 * 0.1 ** $digits);
+            $result = sprintf("%.{$digitsPlus1}F", $number - 0.5 * 0.1 ** $digits);
 
             return round((float) $result, $digits, PHP_ROUND_HALF_DOWN);
         }
@@ -80,7 +80,7 @@ public static function up($number, $digits): array|string|float
         if ($digitsPlus1 < 0) {
             return round($number + 0.5 * 0.1 ** $digits, $digits, PHP_ROUND_HALF_DOWN);
         }
-        $result = sprintf("%.{$digitsPlus1}f", $number + 0.5 * 0.1 ** $digits);
+        $result = sprintf("%.{$digitsPlus1}F", $number + 0.5 * 0.1 ** $digits);
 
         return round((float) $result, $digits, PHP_ROUND_HALF_DOWN);
     }
@@ -119,7 +119,7 @@ public static function down($number, $digits): array|string|float
             if ($digitsPlus1 < 0) {
                 return round($number + 0.5 * 0.1 ** $digits, $digits, PHP_ROUND_HALF_UP);
             }
-            $result = sprintf("%.{$digitsPlus1}f", $number + 0.5 * 0.1 ** $digits);
+            $result = sprintf("%.{$digitsPlus1}F", $number + 0.5 * 0.1 ** $digits);
 
             return round((float) $result, $digits, PHP_ROUND_HALF_UP);
         }
@@ -128,7 +128,7 @@ public static function down($number, $digits): array|string|float
             return round($number - 0.5 * 0.1 ** $digits, $digits, PHP_ROUND_HALF_UP);
         }
 
-        $result = sprintf("%.{$digitsPlus1}f", $number - 0.5 * 0.1 ** $digits);
+        $result = sprintf("%.{$digitsPlus1}F", $number - 0.5 * 0.1 ** $digits);
 
         return round((float) $result, $digits, PHP_ROUND_HALF_UP);
     }
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Trunc.php b/src/PhpSpreadsheet/Calculation/MathTrig/Trunc.php
index 34f18d5403..136f2f4a41 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Trunc.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Trunc.php
@@ -52,7 +52,7 @@ public static function evaluate(array|float|string|null $value = 0, array|int|st
             return ($minusSign === '') ? $result : -$result;
         }
         $decimals = PHP_FLOAT_DIG - strlen((string) (int) $value);
-        $resultString = sprintf('%.' . $decimals . 'f', $value);
+        $resultString = sprintf('%.' . $decimals . 'F', $value);
         $regExp = '/([.]\\d{' . $digits . '})\\d+$/';
         $result = $minusSign . (preg_replace($regExp, '$1', $resultString) ?? $resultString);