diff --git a/src/seedsigner/gui/components.py b/src/seedsigner/gui/components.py
index 0706f213..a66afd24 100644
--- a/src/seedsigner/gui/components.py
+++ b/src/seedsigner/gui/components.py
@@ -22,6 +22,7 @@ class GUIConstants:
     EDGE_PADDING = 8
     COMPONENT_PADDING = 8
     LIST_ITEM_PADDING = 4
+    FIXED_FONT_HEIGHT_PADDING = 6
 
     BACKGROUND_COLOR = "black"
     WARNING_COLOR = "#FFD60A"
@@ -616,7 +617,8 @@ class FormattedAddress(BaseComponent):
 
         # Fixed width font means we only have to measure one max-height character
         left, top, right, bottom  = self.font.getbbox("Q")
-        char_width, char_height = right - left, bottom - top
+        ascent, descent = self.font.getmetrics()
+        char_width, char_height = right - left, bottom - top + descent
 
         n = 7
         display_str = f"{self.address[:n]} {self.address[n:-1*n]} {self.address[-1*n:]}"
diff --git a/src/seedsigner/gui/screens/psbt_screens.py b/src/seedsigner/gui/screens/psbt_screens.py
index 502c3921..92211aaf 100644
--- a/src/seedsigner/gui/screens/psbt_screens.py
+++ b/src/seedsigner/gui/screens/psbt_screens.py
@@ -511,8 +511,9 @@ class PSBTMathScreen(ButtonListScreen):
 
         body_font = Fonts.get_font(GUIConstants.BODY_FONT_NAME, (GUIConstants.BODY_FONT_SIZE)*ssf)
         fixed_width_font = Fonts.get_font(GUIConstants.FIXED_WIDTH_FONT_NAME, (GUIConstants.BODY_FONT_SIZE + 6)*ssf)
-        left, top, right, bottom  = fixed_width_font.getbbox(self.input_amount + "+")
-        digits_width, digits_height = right - left, bottom - top
+        left, top, right, bottom  = fixed_width_font.getbbox(self.input_amount + "Q")
+        ascent, descent = fixed_width_font.getmetrics()
+        digits_width, digits_height = right - left, bottom - top + descent
 
         # Draw each line of the equation
         cur_y = 0