diff --git a/src/scales/__tests__/saxon.ts b/src/scales/__tests__/saxon.ts
index a2baeef..944ea95 100644
--- a/src/scales/__tests__/saxon.ts
+++ b/src/scales/__tests__/saxon.ts
@@ -40,4 +40,11 @@ describe('SAXON', () => {
       expect(isValid).toBe(false)
     })
   })
+
+  describe('getScore', () => {
+    test('should handle grade format with slash "7a/7b"', () => {
+      const score = SaxonScale.getScore('7a/7b')
+      expect(score).not.toEqual(-1)
+    })
+  })
 })
diff --git a/src/scales/saxon.ts b/src/scales/saxon.ts
index 400811d..f430abc 100644
--- a/src/scales/saxon.ts
+++ b/src/scales/saxon.ts
@@ -3,7 +3,7 @@ import routes from '../data/routes.json'
 import { Route } from '.'
 import { GradeBandTypes, routeScoreToBand } from '../GradeBands'
 
-const saxonGradeRegex = /^((([7-9]|1[0-3])([a-c]))|([1-6]))$/i
+const saxonGradeRegex = /^((([7-9]|1[0-3])([a-c]))|([1-6])|([7-9]|1[0-3])(([a-c])\/([7-9]|1[0-3])([a-c])))$/i
 // Saxon grading system, predominant in Central Europe (esp. Germany, Austria, Switzerland)
 // Supports 1 -> 13c, slash grades i.e. 7a/7b
 // Uses Arabic numerals with letters from a-c, e.g. "7a" , "7b", or "7c" (hardest)