diff --git a/.changeset/grade-matches-shown-score.md b/.changeset/grade-matches-shown-score.md
new file mode 100644
index 0000000..6ac9893
--- /dev/null
+++ b/.changeset/grade-matches-shown-score.md
@@ -0,0 +1,5 @@
+---
+'@advance-labs/scoring': patch
+---
+
+Grade the rounded overall score, so the letter grade always matches the number shown. A raw 59.7 displayed as 60 but graded F (seen on amazon.com and adidas.com), and 79.6 displayed as 80 but graded C.
diff --git a/apps/chrome-extension/package.json b/apps/chrome-extension/package.json
index a128842..4c6666c 100644
--- a/apps/chrome-extension/package.json
+++ b/apps/chrome-extension/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@advance-labs/chrome-extension",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "private": true,
   "type": "module",
   "description": "AEO/GEO Chrome MV3 extension — runs a client-side AI-readiness audit on the active tab and exports a PDF.",
diff --git a/packages/scoring/src/engine.test.ts b/packages/scoring/src/engine.test.ts
index 3d88a21..78c1bdd 100644
--- a/packages/scoring/src/engine.test.ts
+++ b/packages/scoring/src/engine.test.ts
@@ -67,6 +67,16 @@ describe('runRules', () => {
     expect(score.criticalCount).toBe(1);
   });
 
+  it('grades the score it shows: 59.7 displays as 60 and grades D, not F', async () => {
+    // Seen live on amazon.com and adidas.com ("60, grade F") and microsoft.com ("80, grade C").
+    const { score } = await runRules(goodContext(), [
+      { ...passRule, weight: 597 },
+      { ...failRule, weight: 403 },
+    ]);
+    expect(score.overall).toBe(60);
+    expect(score.grade).toBe('D');
+  });
+
   it('runs async rules and folds a thrown rule into a failed finding', async () => {
     const ctx = goodContext();
     const { categories, score } = await runRules(ctx, [asyncRule, throwingRule]);
diff --git a/packages/scoring/src/engine.ts b/packages/scoring/src/engine.ts
index 743d2cb..e8a0187 100644
--- a/packages/scoring/src/engine.ts
+++ b/packages/scoring/src/engine.ts
@@ -162,10 +162,12 @@ export function aggregateScore(categories: ScoreCategory[]): Score {
     }
   }
 
-  const overall = weightTotal > 0 ? clampScore(weightedSum / weightTotal) : 100;
+  // Round once and grade the rounded number, so the grade always matches the score shown
+  // (unrounded 79.6 used to display "80" and grade C).
+  const overall = Math.round(weightTotal > 0 ? clampScore(weightedSum / weightTotal) : 100);
 
   return {
-    overall: Math.round(overall),
+    overall,
     grade: scoreToGrade(overall),
     categories,
     passedCount,