diff --git a/src/python_module.cpp b/src/python_module.cpp
index 7ac21a5..47f38eb 100755
--- a/src/python_module.cpp
+++ b/src/python_module.cpp
@@ -109,7 +109,8 @@ PYBIND11_MODULE( _viewshed, m )
             "saveVisibilityRaster",
             []( const std::shared_ptr<Viewshed> v, const py::object path )
             { v->saveVisibilityRaster( get_absolute_path( path, "path" ) ); },
-            "Save visibility raster" );
+            "Save visibility raster" )
+        .def( "calculationTime", &Viewshed::parseLastedSeconds, "Seconds that processing of last operation lasted." );
 
     // inverseviewshed
     py::class_<InverseViewshed, std::shared_ptr<InverseViewshed>>( m, "InverseViewshed",
@@ -142,5 +143,8 @@ PYBIND11_MODULE( _viewshed, m )
             "saveVisibilityRaster",
             []( const std::shared_ptr<InverseViewshed> v, const py::object path )
             { v->saveVisibilityRaster( get_absolute_path( path, "path" ) ); },
-            "Save visibility raster" );
+            "Save visibility raster" )
+        .def( "calculationTime", &InverseViewshed::parseLastedSeconds,
+              "Seconds that processing of last operation lasted." );
+    ;
 }
\ No newline at end of file
diff --git a/tests/test_viewshed.py b/tests/test_viewshed.py
index 0ce478c..e3df00a 100644
--- a/tests/test_viewshed.py
+++ b/tests/test_viewshed.py
@@ -83,4 +83,33 @@ def test_viewshed_visibility_raster(
     v.calculateVisibilityMask()
     v.saveVisibilityRaster(visibility_raster)
 
-    assert visibility_raster.exists()
\ No newline at end of file
+    assert visibility_raster.exists()
+
+def test_viewshed_calculation_time(
+    work_folder: Path,
+    dem: viewshed.ProjectedSquareCellRaster,
+    viewpoint: viewshed.Point,
+    mask: viewshed.ProjectedSquareCellRaster,
+    fn_print_percent_done,
+    fn_print_timing,
+    file_messages_percent,
+    file_messages_timing,
+) -> None:
+    algs = viewshed.VisibilityAlgorithms(False)
+
+    v = viewshed.Viewshed(viewpoint, dem, algs)
+    assert isinstance(v, viewshed.Viewshed)
+
+    visibility_raster = work_folder / "visibility_raster.tif"
+
+    v.calculateVisibilityMask()
+    time_visibility_mask = v.calculationTime()
+
+    assert time_visibility_mask < 0.00001
+
+    v.calculate()
+    time_visibility = v.calculationTime()
+
+    assert time_visibility < 0.02
+
+    assert time_visibility > time_visibility_mask
\ No newline at end of file