diff --git a/resources/tester/test_est_exchange.py b/resources/tester/test_est_exchange.py
index 329f1e3c3..fcdd1158a 100644
--- a/resources/tester/test_est_exchange.py
+++ b/resources/tester/test_est_exchange.py
@@ -10,6 +10,33 @@ from test_est_rea_parity import run
 ROOT = Path(__file__).resolve().parents[2]
 
 
+def test_report_excel_contains_numeric_values_and_separate_errors():
+    import base64
+    import openpyxl
+
+    script = """const {server}=require('./tools/est-test/server.cjs');
+    server.listen(0,'127.0.0.1',async()=>{try{
+      const url=`http://127.0.0.1:${server.address().port}/api/export-report-xlsx`;
+      const post=body=>fetch(url,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(body)});
+      const ok=await post({name:'test',columns:['Name','Value'],rows:[['=1+1',7]],detail:'summary',errors:['bad input']});
+      const bad=await post({columns:['Name'],rows:[[null]],errors:[]});
+      process.stdout.write(JSON.stringify({data:Buffer.from(await ok.arrayBuffer()).toString('base64'),status:bad.status}));
+    }finally{server.close()}});"""
+    result = json.loads(
+        subprocess.run(
+            ["node", "-e", script], cwd=ROOT, capture_output=True, check=True, timeout=15
+        ).stdout
+    )
+    workbook = openpyxl.load_workbook(io.BytesIO(base64.b64decode(result["data"])))
+    assert workbook["Report"]["A2"].value == "=1+1"
+    assert workbook["Report"]["A2"].data_type == "s"
+    assert workbook["Report"]["B2"].value == 7
+    assert workbook["Summary"]["A2"].value == "summary"
+    assert workbook["Errors"]["A2"].value == "bad input"
+    assert result["status"] == 400
+    workbook.close()
+
+
 def export_workbook(project):
     result = subprocess.run(
         [
diff --git a/tools/est-test/README.md b/tools/est-test/README.md
index cc4ec9d2f..4de48b4de 100644
--- a/tools/est-test/README.md
+++ b/tools/est-test/README.md
@@ -8,6 +8,8 @@
 
 별도 인쇄 서식으로 기성·물가변동의 내역서와 원가계산서, 연차 배분표와 연차별 내역서, 설계변경 원가 증감표를 선택할 수 있습니다. 기성은 선택한 회차를 출력하고 확정된 회차는 확정 당시 결과를 사용합니다.
 
+인쇄 미리보기에서 `서식 Excel 저장`을 누르면 선택한 표의 계산 결과를 별도 Excel 파일로 내려받습니다. 결과 요약과 계산 오류가 있으면 각각 별도 시트에 표시합니다. 이 파일은 출력용이며 전체 작업을 다시 가져오려면 전체 자료 Excel 또는 JSON 저장을 사용합니다.
+
 저장은 이 폴더의 `data/`에 작업을 보관하고 `.estweb.json` 파일도 내려받습니다. 브라우저 임시 저장은 같은 탭에서 복원하는 용도입니다. JSON은 모든 웹 업무와 원본 압축 파일·바이너리를 보관하는 전체 저장 형식입니다. ESTX 수정 저장은 아래 지원 조건을 따릅니다.
 
 ## 추가 입출력·문서 기능 (2026-11-06)
diff --git a/tools/est-test/native-actions.js b/tools/est-test/native-actions.js
index dc6eed120..abceb7289 100644
--- a/tools/est-test/native-actions.js
+++ b/tools/est-test/native-actions.js
@@ -214,6 +214,7 @@ const EstActions = (() => {
       const level = Number(node.dataset.level);
       EstApp.change(() => selected().forEach((i) => (activeRows()[i].Level = level)));
     } else if (name === "export-xlsx") await EstExchange.exportExcel();
+    else if (name === "export-report-xlsx") await EstReport.exportExcel();
     else if (name === "export-estx") await EstExchange.exportNative();
     else if (name === "export-jdl") await EstExchange.exportJdl();
     else if (name === "import-jdl") EstApp.byId("jdl-file").click();
diff --git a/tools/est-test/native-forms.js b/tools/est-test/native-forms.js
index 8e2b78397..c0bbe412b 100644
--- a/tools/est-test/native-forms.js
+++ b/tools/est-test/native-forms.js
@@ -309,10 +309,11 @@ const EstForms = (() => {
     JC: "경비",
     SC: "산출경비",
   };
+  const label = (key) => labels[key] || EstModel.labels[key] || key;
   function grid(output) {
     const { esc } = EstApp,
       number = (v) => new Intl.NumberFormat("ko-KR", { maximumFractionDigits: 12 }).format(v);
     return `<table><thead><tr>${output.columns.map((key) => `<th>${esc(labels[key] || EstModel.labels[key] || key)}</th>`).join("")}</tr></thead><tbody>${output.rows.map((row) => `<tr>${output.columns.map((key) => `<td class="${typeof row[key] === "number" ? "numeric" : ""}">${esc(typeof row[key] === "number" ? number(row[key]) : key === "LineData" ? EstText.clean(row[key] || "") : (row[key] ?? ""))}</td>`).join("")}</tr>`).join("")}</tbody></table>`;
   }
-  return { data, grid };
+  return { data, grid, label };
 })();
diff --git a/tools/est-test/native-report.js b/tools/est-test/native-report.js
index 1bbb01f20..2a6633057 100644
--- a/tools/est-test/native-report.js
+++ b/tools/est-test/native-report.js
@@ -172,7 +172,7 @@ const EstReport = (() => {
         .join("")}
       <label>업체명<input data-print="company" value="${esc(s.company)}"></label>
       ${table ? '<label>출력 범위 <select id="print-scope"><option value="current">현재 호표·검색 결과 전체 행</option><option value="all">현재 자료의 모든 호표·행</option></select></label>' : ""}
-      <button data-action="print-document">인쇄 / PDF 저장</button><span id="print-error" role="status"></span></div>
+      <button data-action="print-document">인쇄 / PDF 저장</button><button data-action="export-report-xlsx">서식 Excel 저장</button><span id="print-error" role="status"></span></div>
       <label>문서 본문(표지·갑지·설명서·시방서·심사·공정 문서)<textarea data-print="notes" rows="3" style="width:100%">${esc(s.notes)}</textarea></label>
       <iframe id="print-frame" title="인쇄할 문서" style="width:100%;height:65vh;border:1px solid #aaa"></iframe>`,
     );
@@ -252,5 +252,51 @@ const EstReport = (() => {
     frame.contentWindow.focus();
     frame.contentWindow.print();
   }
-  return { open, preview, print };
+  async function exportExcelReport() {
+    const { state } = EstApp;
+    const form = catalog.find((row) => String(row.Index) === setting().form);
+    const output = form && EstForms.data(form.Index, state.project, state);
+    if (!output) throw Error("표 형식의 인쇄 서식을 선택하세요.");
+    if (!output.rows.length) throw Error("출력할 행이 없습니다.");
+    const used = new Set();
+    const columns = output.columns.map((key) => {
+      const base = EstForms.label(key);
+      let name = base,
+        suffix = 2;
+      while (used.has(name)) name = `${base} (${suffix++})`;
+      used.add(name);
+      return name;
+    });
+    const rows = output.rows.map((row) =>
+      output.columns.map((key) =>
+        key === "LineData" ? EstText.clean(row[key] || "") : (row[key] ?? ""),
+      ),
+    );
+    const response = await fetch("/api/export-report-xlsx", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({
+        name: state.project.name,
+        columns,
+        rows,
+        detail: output.detail || "",
+        errors: output.errors || [],
+      }),
+    });
+    if (!response.ok) throw Error((await response.json()).error);
+    EstApp.download(
+      `${state.project.name} - ${form.Name}.xlsx`,
+      await response.blob(),
+      "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+    );
+  }
+  async function exportExcel() {
+    try {
+      await exportExcelReport();
+      EstApp.byId("print-error").textContent = "";
+    } catch (error) {
+      EstApp.byId("print-error").textContent = error.message;
+    }
+  }
+  return { open, preview, print, exportExcel };
 })();
diff --git a/tools/est-test/server.cjs b/tools/est-test/server.cjs
index 622afa543..e09bff232 100644
--- a/tools/est-test/server.cjs
+++ b/tools/est-test/server.cjs
@@ -165,6 +165,40 @@ const server = http.createServer(async (req, res) => {
       reply(res, 200, { data: out.bytes.toString("base64"), warnings: out.warnings });
       return;
     }
+    if (req.method === "POST" && url.pathname === "/api/export-report-xlsx") {
+      const input = JSON.parse((await body(req)).toString("utf8"));
+      if (
+        !Array.isArray(input.columns) ||
+        !input.columns.length ||
+        input.columns.some((x) => typeof x !== "string") ||
+        new Set(input.columns).size !== input.columns.length ||
+        !Array.isArray(input.rows) ||
+        input.rows.some(
+          (row) =>
+            !Array.isArray(row) ||
+            row.length !== input.columns.length ||
+            row.some((value) => !["string", "number", "boolean"].includes(typeof value)),
+        ) ||
+        (input.detail != null && typeof input.detail !== "string") ||
+        !Array.isArray(input.errors) ||
+        input.errors.some((x) => typeof x !== "string")
+      )
+        throw Error("Excel 출력 데이터 형식 오류");
+      const rows = input.rows.map((row) =>
+        Object.fromEntries(input.columns.map((key, index) => [key, row[index]])),
+      );
+      const tables = { Report: rows };
+      if (input.detail) tables.Summary = [{ "결과 요약": input.detail }];
+      if (input.errors.length)
+        tables.Errors = input.errors.map((message) => ({ "계산 오류": message }));
+      reply(
+        res,
+        200,
+        exchange.workbook({ name: String(input.name || ""), tables }),
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+      );
+      return;
+    }
     if (req.method === "POST" && url.pathname === "/api/export-xlsx") {
       const project = calculate(JSON.parse((await body(req)).toString("utf8")));
       reply(