diff --git a/apps/math_toolbox.cpp b/apps/math_toolbox.cpp
index 450038d48..a01af1c42 100644
--- a/apps/math_toolbox.cpp
+++ b/apps/math_toolbox.cpp
@@ -364,13 +364,20 @@ const ToolboxMessageTree Electromagnetism[] = {
   ToolboxMessageTree::Leaf(I18n::Message::CoulombTag, I18n::Message::Coulomb, false, I18n::Message::Coulomb),
   ToolboxMessageTree::Leaf(I18n::Message::Vacuum_permittivityTag, I18n::Message::Vacuum_permittivity, false, I18n::Message::Vacuum_permittivity),
   ToolboxMessageTree::Leaf(I18n::Message::Vacuum_permeabilityTag, I18n::Message::Vacuum_permeability, false, I18n::Message::Vacuum_permeability),
-  ToolboxMessageTree::Leaf(I18n::Message::PlanckTag, I18n::Message::Planck, false, I18n::Message::Planck)
+  ToolboxMessageTree::Leaf(I18n::Message::PlanckTag, I18n::Message::Planck, false, I18n::Message::Planck),
+  ToolboxMessageTree::Leaf(I18n::Message::ElementalChargeTag, I18n::Message::ElementalCharge, false, I18n::Message::ElementalCharge)
+};
+
+const ToolboxMessageTree Gravitation[] = {
+  ToolboxMessageTree::Leaf(I18n::Message::GAccelerationTag, I18n::Message::GAcceleration, false, I18n::Message::GAcceleration),
+  ToolboxMessageTree::Leaf(I18n::Message::GConstantTag, I18n::Message::GConstant, false, I18n::Message::GConstant)
 };
 
 const ToolboxMessageTree Physics[] = {
   ToolboxMessageTree::Node(I18n::Message::UnitOfMesurement, UnitOfMesurement),
   ToolboxMessageTree::Node(I18n::Message::Thermodynamics, Thermodynamics),
-  ToolboxMessageTree::Node(I18n::Message::Electromagnetism, Electromagnetism)
+  ToolboxMessageTree::Node(I18n::Message::Electromagnetism, Electromagnetism),
+  ToolboxMessageTree::Node(I18n::Message::Gravitation, Gravitation)
 };
 
 const ToolboxMessageTree menu[] = {
diff --git a/apps/shared.universal.i18n b/apps/shared.universal.i18n
index 92d5f5a44..ac518d64d 100644
--- a/apps/shared.universal.i18n
+++ b/apps/shared.universal.i18n
@@ -227,3 +227,6 @@ Planck = "6.62607015*10^-34"
 ElectronMass = "9.109383*10^-31"
 ProtonMass = "1.672649*10^-27"
 NeutronMass = "1.67493*10^-27"
+ElementalCharge = "1,60217662·^-19"
+GAcceleration = "9,80665"
+GConstant = "6.674*10^-11"
\ No newline at end of file
diff --git a/apps/toolbox.de.i18n b/apps/toolbox.de.i18n
index e9a0200e6..8704dd9ad 100644
--- a/apps/toolbox.de.i18n
+++ b/apps/toolbox.de.i18n
@@ -322,3 +322,7 @@ PlanckTag = "Planck - Konstante (m^2·kg·s^-1)"
 ElectronMassTag = "Masse eines Elektrons (kg)"
 ProtonMassTag = "Masse eines Protons (kg)"
 NeutronMassTag = "Masse eines Neutrons (kg)"
+Gravitation = "Gravitation"
+ElementalChargeTag = "Elementarladung (C)"
+GAccelerationTag = "Beschleunigung (m·s^-2)"
+GConstantTag = "Konstant (m^3·kg^-1·s^-2)"
\ No newline at end of file
diff --git a/apps/toolbox.en.i18n b/apps/toolbox.en.i18n
index 34e51be19..00c0f8ac4 100644
--- a/apps/toolbox.en.i18n
+++ b/apps/toolbox.en.i18n
@@ -322,3 +322,7 @@ PlanckTag = "Planck constant (m^2·kg·s^-1)"
 ElectronMassTag = "Mass of an electron (kg)"
 ProtonMassTag = "Mass of a proton (kg)"
 NeutronMassTag = "Mass of a neutron (kg)"
+Gravitation = "Gravitation"
+ElementalChargeTag = "Elemental Charge (C)"
+GAccelerationTag = "Acceleration (m·s^-2)"
+GConstantTag = "Constant (m^3·kg^-1·s^-2)"
\ No newline at end of file
diff --git a/apps/toolbox.es.i18n b/apps/toolbox.es.i18n
index 2cd19e2de..0ba807a5f 100644
--- a/apps/toolbox.es.i18n
+++ b/apps/toolbox.es.i18n
@@ -322,3 +322,7 @@ PlanckTag = "Constante de Planck (m^2·kg·s^-1)"
 ElectronMassTag = "Masa de un electrón (kg)"
 ProtonMassTag = "Masa de un protón (kg)"
 NeutronMassTag = "Masa de un neutrón (kg)"
+Gravitation = "Gravitación"
+ElementalChargeTag = "Carga elemental (C)"
+GAccelerationTag = "Aceleración (m·s^-2)"
+GConstantTag = "Constante (m^3·kg^-1·s^-2)"
\ No newline at end of file
diff --git a/apps/toolbox.fr.i18n b/apps/toolbox.fr.i18n
index 8a6de9dbb..113bd4a10 100644
--- a/apps/toolbox.fr.i18n
+++ b/apps/toolbox.fr.i18n
@@ -322,3 +322,7 @@ PlanckTag = "Const de Planck (m^2·kg·s^-1)"
 ElectronMassTag = "Masse d'un électron (kg)"
 ProtonMassTag = "Masse d'un proton (kg)"
 NeutronMassTag = "Masse d'un neutron (kg)"
+Gravitation = "Gravitation"
+ElementalChargeTag = "Charge élémentaire (C)"
+GAccelerationTag = "Accélération (m·s^-2)"
+GConstantTag = "Constante (m^3·kg^-1·s^-2)"
\ No newline at end of file
diff --git a/apps/toolbox.pt.i18n b/apps/toolbox.pt.i18n
index 3e5c5131a..c36ebcc06 100644
--- a/apps/toolbox.pt.i18n
+++ b/apps/toolbox.pt.i18n
@@ -323,3 +323,7 @@ PlanckTag = "Constante de Planck (m^2·kg·s^-1)"
 ElectronMassTag = "Massa de um elétron (kg)"
 ProtonMassTag = "Massa de um próton (kg)"
 NeutronMassTag = "Massa de um nêutron (kg)"
+Gravitation = "Gravitação"
+ElementalChargeTag = "Carga elementar (C)"
+GAccelerationTag = "Aceleração (m·s^-2)"
+GConstantTag = "Constante (m^3·kg^-1·s^-2)"
\ No newline at end of file