diff --git a/inc/Data/Exif.php b/inc/Data/Exif.php
index caf9bb82..093998a9 100644
--- a/inc/Data/Exif.php
+++ b/inc/Data/Exif.php
@@ -21,4 +21,40 @@ class Exif {
 	public static function exifOrientationOnSide(int $exif_orientation): bool {
 		return $exif_orientation >= 5 && $exif_orientation <= 8;
 	}
+
+	/**
+	 * Gives the rotation in degrees of the given exif orientation.
+	 *
+	 * @param int $exif_orientation One of the EXIF_ORIENTATION_* constants.
+	 * @return int Rotation in degrees.
+	 */
+	public static function exifOrientationDegrees(int $exif_orientation): int {
+		switch ($exif_orientation) {
+			case self::EXIF_ORIENTATION_UNDEFINED:
+			case self::EXIF_ORIENTATION_0_UPRIGHT:
+			case self::EXIF_ORIENTATION_0_FLIPPED:
+				return 0;
+			case self::EXIF_ORIENTATION_180_UPRIGHT:
+			case self::EXIF_ORIENTATION_180_FLIPPED:
+				return 180;
+			case self::EXIF_ORIENTATION_90_UPRIGHT:
+			case self::EXIF_ORIENTATION_90_FLIPPED:
+				return 90;
+			case self::EXIF_ORIENTATION_270_UPRIGHT:
+			case self::EXIF_ORIENTATION_270_FLIPPED:
+				return 270;
+			default:
+				throw new \RuntimeException("Invalid exif orientation '$exif_orientation'");
+		}
+	}
+
+	/**
+	 * If the given exif orientation flips the image.
+	 *
+	 * @param int $exif_orientation One of the EXIF_ORIENTATION_* constants.
+	 * @return bool If the image is flipped.
+	 */
+	public static function exifOrientationIsFlipped(int $exif_orientation): bool {
+		return $exif_orientation % 2 == 0;
+	}
 }