diff --git a/manual_trading_hub/static/calculator.js b/manual_trading_hub/static/calculator.js
index 05c1484..a7a2c28 100644
--- a/manual_trading_hub/static/calculator.js
+++ b/manual_trading_hub/static/calculator.js
@@ -42,6 +42,16 @@
     return String(n);
   }
 
+  /** 去掉尾部多余 0，用于乘数/精度展示 */
+  function fmtTrim(v, maxDigits) {
+    if (v == null || v === "") return "—";
+    const n = Number(v);
+    if (!Number.isFinite(n)) return esc(v);
+    let s = maxDigits != null ? n.toFixed(maxDigits) : String(n);
+    if (s.includes(".")) s = s.replace(/\.?0+$/, "");
+    return s;
+  }
+
   function fmtU(v) {
     if (v == null || v === "") return "—";
     const n = Number(v);
@@ -72,12 +82,12 @@
     const parts = [
       inst + "<strong>" + esc(market.display_symbol || market.base || "") + "</strong> 永续",
       "合约 " + esc(market.exchange_symbol || ""),
-      "乘数 " + fmt(market.contract_size, 8),
-      "价格精度 " + fmt(market.price_tick != null ? market.price_tick : Math.pow(10, -(market.price_decimals || 0))),
-      "张数精度 " + fmt(Math.pow(10, -(market.amount_decimals || 0))),
+      "乘数 " + fmtTrim(market.contract_size, 8),
+      "价格精度 " + fmtTrim(market.price_tick != null ? market.price_tick : Math.pow(10, -(market.price_decimals || 0))),
+      "张数精度 " + fmtTrim(Math.pow(10, -(market.amount_decimals || 0))),
     ];
     if (market.min_amount != null) {
-      parts.push("最小张数 " + fmt(market.min_amount, market.amount_decimals));
+      parts.push("最小张数 " + fmtTrim(market.min_amount, market.amount_decimals));
     }
     return parts.join(" · ");
   }