diff --git a/include/aare/RawFile.hpp b/include/aare/RawFile.hpp
index 67390fa..82106bc 100644
--- a/include/aare/RawFile.hpp
+++ b/include/aare/RawFile.hpp
@@ -71,6 +71,7 @@ class RawFile : public FileInterface {
     size_t cols() const override;
     size_t bitdepth() const override;
     xy geometry();
+    size_t n_modules() const;
 
     RawMasterFile master() const;
 
diff --git a/python/src/raw_file.hpp b/python/src/raw_file.hpp
index 7cfb9c9..8b8a5a6 100644
--- a/python/src/raw_file.hpp
+++ b/python/src/raw_file.hpp
@@ -102,5 +102,6 @@ void define_raw_file_io_bindings(py::module &m) {
         .def_property_readonly("bitdepth", &RawFile::bitdepth)
         .def_property_readonly("geometry", &RawFile::geometry)
         .def_property_readonly("detector_type", &RawFile::detector_type)
-        .def_property_readonly("master", &RawFile::master);
+        .def_property_readonly("master", &RawFile::master)
+        .def_property_readonly("n_modules", &RawFile::n_modules);
 }
\ No newline at end of file
diff --git a/src/RawFile.cpp b/src/RawFile.cpp
index cdcc0e4..dc6c907 100644
--- a/src/RawFile.cpp
+++ b/src/RawFile.cpp
@@ -97,6 +97,8 @@ size_t RawFile::cols() const { return m_geometry.pixels_x(); }
 size_t RawFile::bitdepth() const { return m_master.bitdepth(); }
 xy RawFile::geometry() { return m_master.geometry(); }
 
+size_t RawFile::n_modules() const { return m_geometry.n_modules(); };
+
 void RawFile::open_subfiles() {
     if (m_mode == "r")
         for (size_t i : m_geometry.get_modules_in_roi()) {