diff --git a/mean_average_precision/detection_map.py b/mean_average_precision/detection_map.py
index a4475f2..4782652 100644
--- a/mean_average_precision/detection_map.py
+++ b/mean_average_precision/detection_map.py
@@ -157,3 +157,17 @@ def plot(self, interpolated=True):
 
         plt.suptitle("Mean average precision : {:0.2f}".format(sum(mean_average_precision)/len(mean_average_precision)))
         fig.tight_layout()
+
+    def compute_map(self, interpolated=True):
+        """
+        Compute average precision per class and the mAP score.
+        :param interpolated: will compute the interpolated curve
+        :return: tuple: (dict of class -> AP, mAP score)
+        """
+        ap_by_class = {}
+        for class_idx in range(self.n_class):
+            precisions, recalls = self.compute_precision_recall_(class_idx, interpolated=interpolated)
+            average_precision = self.compute_ap(precisions, recalls)
+            ap_by_class[class_idx] = average_precision
+        mAP = sum(ap_by_class.values()) / len(ap_by_class)
+        return ap_by_class, mAP