diff --git a/frontend/src/Activity/History/HistoryRow.js b/frontend/src/Activity/History/HistoryRow.js
index 2a0465e35..0c6a814fb 100644
--- a/frontend/src/Activity/History/HistoryRow.js
+++ b/frontend/src/Activity/History/HistoryRow.js
@@ -8,7 +8,8 @@ import IconButton from 'Components/Link/IconButton';
 import RelativeDateCellConnector from 'Components/Table/Cells/RelativeDateCellConnector';
 import TableRowCell from 'Components/Table/Cells/TableRowCell';
 import TableRow from 'Components/Table/TableRow';
-import { icons } from 'Helpers/Props';
+import Tooltip from 'Components/Tooltip/Tooltip';
+import { icons, tooltipPositions } from 'Helpers/Props';
 import formatPreferredWordScore from 'Utilities/Number/formatPreferredWordScore';
 import HistoryDetailsModal from './Details/HistoryDetailsModal';
 import HistoryEventTypeCell from './HistoryEventTypeCell';
@@ -57,6 +58,7 @@ class HistoryRow extends Component {
       book,
       quality,
       customFormats,
+      customFormatScore,
       qualityCutoffNotMet,
       eventType,
       sourceTitle,
@@ -177,7 +179,14 @@ class HistoryRow extends Component {
                   key={name}
                   className={styles.customFormatScore}
                 >
-                  {formatPreferredWordScore(data.customFormatScore)}
+                  <Tooltip
+                    anchor={formatPreferredWordScore(
+                      customFormatScore,
+                      customFormats.length
+                    )}
+                    tooltip={<BookFormats formats={customFormats} />}
+                    position={tooltipPositions.BOTTOM}
+                  />
                 </TableRowCell>
               );
             }
@@ -244,6 +253,7 @@ HistoryRow.propTypes = {
   book: PropTypes.object,
   quality: PropTypes.object.isRequired,
   customFormats: PropTypes.arrayOf(PropTypes.object),
+  customFormatScore: PropTypes.number.isRequired,
   qualityCutoffNotMet: PropTypes.bool.isRequired,
   eventType: PropTypes.string.isRequired,
   sourceTitle: PropTypes.string.isRequired,
@@ -257,4 +267,8 @@ HistoryRow.propTypes = {
   onMarkAsFailedPress: PropTypes.func.isRequired
 };
 
+HistoryRow.defaultProps = {
+  customFormats: []
+};
+
 export default HistoryRow;
diff --git a/frontend/src/Activity/Queue/QueueRow.js b/frontend/src/Activity/Queue/QueueRow.js
index cb3f90ac8..017960c16 100644
--- a/frontend/src/Activity/Queue/QueueRow.js
+++ b/frontend/src/Activity/Queue/QueueRow.js
@@ -14,6 +14,7 @@ import TableRowCell from 'Components/Table/Cells/TableRowCell';
 import TableSelectCell from 'Components/Table/Cells/TableSelectCell';
 import TableRow from 'Components/Table/TableRow';
 import Popover from 'Components/Tooltip/Popover';
+import Tooltip from 'Components/Tooltip/Tooltip';
 import { icons, kinds, tooltipPositions } from 'Helpers/Props';
 import InteractiveImportModal from 'InteractiveImport/InteractiveImportModal';
 import formatBytes from 'Utilities/Number/formatBytes';
@@ -230,7 +231,14 @@ class QueueRow extends Component {
                   key={name}
                   className={styles.customFormatScore}
                 >
-                  {formatPreferredWordScore(customFormatScore)}
+                  <Tooltip
+                    anchor={formatPreferredWordScore(
+                      customFormatScore,
+                      customFormats.length
+                    )}
+                    tooltip={<BookFormats formats={customFormats} />}
+                    position={tooltipPositions.BOTTOM}
+                  />
                 </TableRowCell>
               );
             }
@@ -430,6 +438,7 @@ QueueRow.propTypes = {
 };
 
 QueueRow.defaultProps = {
+  customFormats: [],
   isGrabbing: false,
   isRemoving: false
 };
diff --git a/src/Readarr.Api.V1/History/HistoryResource.cs b/src/Readarr.Api.V1/History/HistoryResource.cs
index 5ae690c13..b542871f7 100644
--- a/src/Readarr.Api.V1/History/HistoryResource.cs
+++ b/src/Readarr.Api.V1/History/HistoryResource.cs
@@ -17,6 +17,7 @@ public class HistoryResource : RestResource
         public string SourceTitle { get; set; }
         public QualityModel Quality { get; set; }
         public List<CustomFormatResource> CustomFormats { get; set; }
+        public int CustomFormatScore { get; set; }
         public bool QualityCutoffNotMet { get; set; }
         public DateTime Date { get; set; }
         public string DownloadId { get; set; }
@@ -38,6 +39,9 @@ public static HistoryResource ToResource(this EntityHistory model, ICustomFormat
                 return null;
             }
 
+            var customFormats = formatCalculator.ParseCustomFormat(model, model.Author);
+            var customFormatScore = model.Author?.QualityProfile?.Value?.CalculateCustomFormatScore(customFormats) ?? 0;
+
             return new HistoryResource
             {
                 Id = model.Id,
@@ -46,7 +50,8 @@ public static HistoryResource ToResource(this EntityHistory model, ICustomFormat
                 AuthorId = model.AuthorId,
                 SourceTitle = model.SourceTitle,
                 Quality = model.Quality,
-                CustomFormats = formatCalculator.ParseCustomFormat(model, model.Author).ToResource(false),
+                CustomFormats = customFormats.ToResource(false),
+                CustomFormatScore = customFormatScore,
 
                 //QualityCutoffNotMet
                 Date = model.Date,