diff --git a/.gitattributes b/.gitattributes
index c44cbcf..e1abb9c 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -187,6 +187,7 @@ invesalius/gui/widgets/platebtn.py -text
 invesalius/gui/widgets/slice_menu.py -text
 invesalius/i18n.py -text
 invesalius/invesalius.py -text
+invesalius/math_utils.py -text
 invesalius/presets.py -text
 invesalius/project.py -text
 invesalius/reader/__init__.py -text
diff --git a/invesalius/math_utils.py b/invesalius/math_utils.py
new file mode 100644
index 0000000..dfe9a86
--- /dev/null
+++ b/invesalius/math_utils.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import math
+import numpy
+
+def calculate_distance(p1, p2):
+    """
+    Calculates the euclidian distance between p1 and p2 points.
+
+    >>> calculate_distance((0, 0), (1, 0))
+    1.0
+
+    >>> calculate_distance((0, 0), (0, 1))
+    1.0
+    """
+    return math.sqrt(sum([(j-i)**2 for i,j in zip(p1, p2)]))
+
+def calculate_angle(v1, v2):
+    """
+    Calculates the angle formed between vector v1 and v2.
+
+    >>> calculate_angle((0, 1), (1, 0))
+    90.0
+    
+    >>> calculate_angle((1, 0), (0, 1))
+    90.0
+    """
+    cos_ = numpy.dot(v1, v2)/(numpy.linalg.norm(v1)*numpy.linalg.norm(v2))
+    angle = math.degrees(math.acos(cos_))
+    return angle
+
+if __name__ == '__main__':
+    import doctest
+    doctest.testmod()
--
libgit2 0.21.2