diff --git a/gui/builtinGraphs/fitDamageStats/calc.py b/gui/builtinGraphs/fitDamageStats/calc.py
index fa720ba5a..9d2d04bdc 100644
--- a/gui/builtinGraphs/fitDamageStats/calc.py
+++ b/gui/builtinGraphs/fitDamageStats/calc.py
@@ -67,6 +67,21 @@ def getSmartbombMult(mod, distance):
     return 1
 
 
+def getDoomsdayMult(mod, tgt, distance, tgtSigRadius):
+    modRange = mod.maxRange
+    # Single-target DDs have no range limit
+    if modRange and distance > modRange:
+        return 0
+    # Single-target titan DDs are vs capitals only
+    if {'superWeaponAmarr', 'superWeaponCaldari', 'superWeaponGallente', 'superWeaponMinmatar'}.intersection(mod.item.effects):
+        if not tgt.ship.item.requiresSkill('Capital Ships'):
+            return 0
+    damageSig = mod.getModifiedItemAttr('doomsdayDamageRadius') or mod.getModifiedItemAttr('signatureRadius')
+    if not damageSig:
+        return 1
+    return min(1, tgtSigRadius / damageSig)
+
+
 def getBombMult(mod, fit, tgt, distance, tgtSigRadius):
     modRange = mod.maxRange
     if modRange is None:
diff --git a/gui/builtinGraphs/fitDamageStats/graph.py b/gui/builtinGraphs/fitDamageStats/graph.py
index b8c6fde4a..8bdd43b93 100644
--- a/gui/builtinGraphs/fitDamageStats/graph.py
+++ b/gui/builtinGraphs/fitDamageStats/graph.py
@@ -27,7 +27,7 @@ from service.const import GraphCacheCleanupReason
 from service.settings import GraphSettings
 from .calc import (
     getTurretMult, getLauncherMult, getDroneMult, getFighterAbilityMult,
-    getSmartbombMult, getBombMult, getGuidedBombMult,
+    getSmartbombMult, getDoomsdayMult, getBombMult, getGuidedBombMult,
     getWebbedSpeed, getTpMult)
 from .projectedCache import ProjectedDataCache
 from .timeCache import TimeCache
@@ -484,6 +484,12 @@ class FitDamageStatsGraph(FitGraph):
                     fit=fit,
                     distance=distance,
                     tgtSigRadius=tgtSigRadius)
+            elif mod.item.group.name in ('Super Weapon', 'Structure Doomsday Weapon'):
+                applicationMap[mod] = getDoomsdayMult(
+                    mod=mod,
+                    tgt=tgt,
+                    distance=distance,
+                    tgtSigRadius=tgtSigRadius)
         for drone in fit.drones:
             if not drone.isDealingDamage():
                 continue