diff --git a/docs/source_docs/Inputs_Chapter.rst b/docs/source_docs/Inputs_Chapter.rst
index fb6c6bf721015e9bb144f54f91078d24625d91ae..e2a1dd56618de6a6c3425108251a2a5601a275ef 100644
--- a/docs/source_docs/Inputs_Chapter.rst
+++ b/docs/source_docs/Inputs_Chapter.rst
@@ -49,4 +49,5 @@ keywords such as ``mfix``, ``amr``, ``geometry``, ``nodal_proj`` etc.
    inputs/InputsPlotFiles
    inputs/InputsCheckpoint
    inputs/InputsMonitors
+   inputs/InputsPICtoDEM
    inputs/InputsVerbosity
diff --git a/docs/source_docs/inputs/InputsPICtoDEM.rst b/docs/source_docs/inputs/InputsPICtoDEM.rst
new file mode 100644
index 0000000000000000000000000000000000000000..63a46d3001190ea6f2251b6736b239f41728e04d
--- /dev/null
+++ b/docs/source_docs/inputs/InputsPICtoDEM.rst
@@ -0,0 +1,80 @@
+.. _Chap:InputsPICtoDEM:
+
+PIC to DEM conversion
+=====================
+
+The PIC to DEM tool allows to convert a checkpoint file obtained from a PIC run
+into a new checkpoint file on a custom-refined mesh with DEM particles. The DEM
+particles positions are initialized such that the original PIC parcels
+distribution (aka the solids volume fraction) is preserved in each cell up to
+a negligible error.
+
+Building the PIC to DEM tool using CMake (from inside the build directory):
+
+::
+
+    cmake --build ./ --target pic2dem
+
+The following inputs must be preceded by "pic2dem".
+
++------------------+---------------------------------------------------+--------+---------+
+|                  | Description                                       | Type   | Default |
++==================+===================================================+========+=========+
+| refinement_ratio | The mesh refinement ratio that will be applied    | int    | 1       |
+|                  | on each direction to obtain a refined mesh out of |        |         |
+|                  | the one  read form the PIC checkpoint file        |        |         |
++------------------+---------------------------------------------------+--------+---------+
+| eps_tolerance    | The threshold used for DEM particles generation   | Real   | 1.e-15  |
+|                  | from the PIC solids volfrac distribution. If ep_s |        |         |
+|                  | in a cell is below the threshold, no DEM solids   |        |         |
+|                  | will be generated in that cell                    |        |         |
++------------------+---------------------------------------------------+--------+---------+
+| eps_overflow     | An artifact, like a knob, for the user to force   | Real   | 1.0     |
+|                  | over-production (if value > 1), or                |        |         |
+|                  | under-production (if value < 1) of DEM particles  |        |         |
++------------------+---------------------------------------------------+--------+---------+
+
+The following inputs must be preceded by "eb2".
+
++-----------------------+----------------------------------------------+--------+---------+
+|                       | Description                                  | Type   | Default |
++=======================+==============================================+========+=========+
+| refined_small_volfrac | This input gives the possibility to set a    | Real   | 0.      |
+|                       | small volfrac value just for the DEM refined |        |         |
+|                       | case, while the standard small volfrac value |        |         |
+|                       | will still be used for the PIC case read     |        |         |
+|                       | from the checkpoint file                     |        |         |
++-----------------------+----------------------------------------------+--------+---------+
+
+The following inputs must be preceded by "amr".
+
++-------------------------------+--------------------------------------+--------+---------+
+|                               | Description                          | Type   | Default |
++===============================+======================================+========+=========+
+| refined_geom_chk_file         | Name of the EB checkpoint file where | string | ""      |
+|                               | the DEM refined case geometry will   |        |         |
+|                               | be read or written                   |        |         |
++-------------------------------+--------------------------------------+--------+---------+
+| refined_geom_chk_refined_file | Name of the EB checkpoint file where | string | ""      |
+|                               | the finer levels of the geometry for |        |         |
+|                               | the DEM refined case will be read or |        |         |
+|                               | written                              |        |         |
++-------------------------------+--------------------------------------+--------+---------+
+| refined_geom_chk_write        | Flag to turn on/off writing the EB   | bool   | false   |
+|                               | geometry checkpoint file for the DEM |        |         |
+|                               | refined case                         |        |         |
++-------------------------------+--------------------------------------+--------+---------+
+| refined_geom_chk_read         | Flag to turn on/off reading the EB   | bool   | true    |
+|                               | geometry checkpoint file for the DEM |        |         |
+|                               | refined case                         |        |         |
++-------------------------------+--------------------------------------+--------+---------+
+
+The following inputs must be preceded by "pic2dem".
+
++-------------------+--------------------------------------------------+--------+---------+
+|                   | Description                                      | Type   | Default |
++===================+==================================================+========+=========+
+| geometry_filename | CSG filename that will be used for generating    | string | ""      |
+|                   | the DEM refined geometry in case the PIC coarse  |        |         |
+|                   | geometry is read from  a checkpoint file         |        |         |
++-------------------+--------------------------------------------------+--------+---------+