diff --git a/pcb_calculator/dialogs/pcb_calculator_frame_base.cpp b/pcb_calculator/dialogs/pcb_calculator_frame_base.cpp
index 7cae9330bc..77bc9be096 100644
--- a/pcb_calculator/dialogs/pcb_calculator_frame_base.cpp
+++ b/pcb_calculator/dialogs/pcb_calculator_frame_base.cpp
@@ -561,6 +561,8 @@ PCB_CALCULATOR_FRAME_BASE::PCB_CALCULATOR_FRAME_BASE( wxWindow* parent, wxWindow
 
 	m_staticTextViaLength = new wxStaticText( sbSizerVS_Inputs->GetStaticBox(), wxID_ANY, _("Via length:"), wxDefaultPosition, wxDefaultSize, 0 );
 	m_staticTextViaLength->Wrap( -1 );
+	m_staticTextViaLength->SetToolTip( _("Via length is the board thickness for through hole vias") );
+
 	fgSizerVS_Inputs->Add( m_staticTextViaLength, 0, wxALIGN_CENTER_VERTICAL|wxALIGN_RIGHT|wxLEFT|wxRIGHT, 5 );
 
 	m_textCtrlViaLength = new wxTextCtrl( sbSizerVS_Inputs->GetStaticBox(), wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, 0 );
@@ -571,9 +573,9 @@ PCB_CALCULATOR_FRAME_BASE::PCB_CALCULATOR_FRAME_BASE( wxWindow* parent, wxWindow
 	m_choiceViaLength->SetSelection( 0 );
 	fgSizerVS_Inputs->Add( m_choiceViaLength, 0, wxALIGN_CENTER_VERTICAL|wxEXPAND|wxLEFT|wxRIGHT|wxTOP, 5 );
 
-	m_staticTextViaPadDia = new wxStaticText( sbSizerVS_Inputs->GetStaticBox(), wxID_ANY, _("Via pad dia:"), wxDefaultPosition, wxDefaultSize, 0 );
+	m_staticTextViaPadDia = new wxStaticText( sbSizerVS_Inputs->GetStaticBox(), wxID_ANY, _("Via pad diameter:"), wxDefaultPosition, wxDefaultSize, 0 );
 	m_staticTextViaPadDia->Wrap( -1 );
-	m_staticTextViaPadDia->SetToolTip( _("Diameter of pad surrounding via") );
+	m_staticTextViaPadDia->SetToolTip( _("Diameter of pad surrounding via (annular ring)") );
 
 	fgSizerVS_Inputs->Add( m_staticTextViaPadDia, 0, wxALIGN_CENTER_VERTICAL|wxALIGN_RIGHT|wxLEFT|wxRIGHT, 5 );
 
@@ -585,7 +587,7 @@ PCB_CALCULATOR_FRAME_BASE::PCB_CALCULATOR_FRAME_BASE( wxWindow* parent, wxWindow
 	m_choiceViaPadDia->SetSelection( 0 );
 	fgSizerVS_Inputs->Add( m_choiceViaPadDia, 0, wxALIGN_CENTER_VERTICAL|wxEXPAND|wxLEFT|wxRIGHT|wxTOP, 5 );
 
-	m_staticTextClearanceDia = new wxStaticText( sbSizerVS_Inputs->GetStaticBox(), wxID_ANY, _("Clearance hole dia:"), wxDefaultPosition, wxDefaultSize, 0 );
+	m_staticTextClearanceDia = new wxStaticText( sbSizerVS_Inputs->GetStaticBox(), wxID_ANY, _("Clearance hole diameter:"), wxDefaultPosition, wxDefaultSize, 0 );
 	m_staticTextClearanceDia->Wrap( -1 );
 	m_staticTextClearanceDia->SetToolTip( _("Diameter of clearance hole in ground plane(s)") );
 
diff --git a/pcb_calculator/dialogs/pcb_calculator_frame_base.fbp b/pcb_calculator/dialogs/pcb_calculator_frame_base.fbp
index c7b1100fc7..3441da9a13 100644
--- a/pcb_calculator/dialogs/pcb_calculator_frame_base.fbp
+++ b/pcb_calculator/dialogs/pcb_calculator_frame_base.fbp
@@ -6345,7 +6345,7 @@
                                                             <property name="style"></property>
                                                             <property name="subclass"></property>
                                                             <property name="toolbar_pane">0</property>
-                                                            <property name="tooltip"></property>
+                                                            <property name="tooltip">Via length is the board thickness for through hole vias</property>
                                                             <property name="window_extra_style"></property>
                                                             <property name="window_name"></property>
                                                             <property name="window_style"></property>
@@ -6514,7 +6514,7 @@
                                                             <property name="gripper">0</property>
                                                             <property name="hidden">0</property>
                                                             <property name="id">wxID_ANY</property>
-                                                            <property name="label">Via pad dia:</property>
+                                                            <property name="label">Via pad diameter:</property>
                                                             <property name="markup">0</property>
                                                             <property name="max_size"></property>
                                                             <property name="maximize_button">0</property>
@@ -6536,7 +6536,7 @@
                                                             <property name="style"></property>
                                                             <property name="subclass"></property>
                                                             <property name="toolbar_pane">0</property>
-                                                            <property name="tooltip">Diameter of pad surrounding via</property>
+                                                            <property name="tooltip">Diameter of pad surrounding via (annular ring)</property>
                                                             <property name="window_extra_style"></property>
                                                             <property name="window_name"></property>
                                                             <property name="window_style"></property>
@@ -6705,7 +6705,7 @@
                                                             <property name="gripper">0</property>
                                                             <property name="hidden">0</property>
                                                             <property name="id">wxID_ANY</property>
-                                                            <property name="label">Clearance hole dia:</property>
+                                                            <property name="label">Clearance hole diameter:</property>
                                                             <property name="markup">0</property>
                                                             <property name="max_size"></property>
                                                             <property name="maximize_button">0</property>