diff --git a/u2_cal_ucoin.user.js b/u2_cal_ucoin.user.js
new file mode 100644
index 0000000..3f758ed
--- /dev/null
+++ b/u2_cal_ucoin.user.js
@@ -0,0 +1,84 @@
+// ==UserScript==
+// @name         计算 UCoin 获取量
+// @namespace    https://github.com/lifegpc/userscript
+// @version      0.0.1
+// @description  仅支持计算 体积(B)、数量(D)
+// @author       lifegpc
+// @match        https://u2.dmhy.org/userdetails.php?*
+// ==/UserScript==
+const ONE_CAT = [15, 16, 30];
+const b = 14.5;
+const S0 = 35.082;
+const d = 0.3;
+let parse_size = (await import("https://esm.sh/filesize-parser@1.5.0?pin=v135")).default;
+let handled = false;
+let observer = new MutationObserver((records) => {
+    if (handled) return;
+    for (let i of records) {
+        let e = i.target;
+        console.log(e);
+        if (e.id == 'ka1') {
+            handled = true;
+            let bsum = 0;
+            let warn = 0;
+            let br = e.querySelector("br");
+            let rows = e.querySelectorAll('table:not([class~="torrentname"]) > tbody > tr:not(:first-child)');
+            for (let row of rows) {
+                let cells = row.children;
+                let size = parse_size(cells[2].innerText);
+                const B = b * size / 1_000_000_000 / S0;
+                const cat = parseInt(new URL(cells[0].querySelector('a').href).searchParams.get("cat"));
+                let Pmin = ONE_CAT.includes(cat) ? 1 : 0.5;
+                const ov = cells[1].querySelector("td.overflow-control");
+                const ft = ov.childNodes[1];
+                let up = 1;
+                let down = 1;
+                if (ft.nodeType == ft.ELEMENT_NODE && ft.tagName == "IMG") {
+                    switch (ft.className) {
+                    case "pro_2up":
+                        up = 2;
+                        break;
+                    case "pro_free2up":
+                        up = 2;
+                        down = 0;
+                        break;
+                    case "pro_50pctdown":
+                        down = 0.5;
+                        break;
+                    case "pro_30pctdown":
+                        down = 0.7;
+                        break;
+                    case "pro_50pctdown2up":
+                        up = 2;
+                        down = 0.5;
+                        break;
+                    case "pro_free":
+                        down = 0;
+                        break;
+                    case "pro_custom":
+                        up = parseFloat(ov.querySelector('img[class="arrowup"]').nextElementSibling.innerText);
+                        down = parseFloat(ov.querySelector('img[class="arrowdown"]').nextElementSibling.innerText);
+                        break;
+                    default:
+                        console.warn("Unknown class:", ft.className);
+                        warn += 1;
+                    }
+                }
+                const P = Math.max(Pmin, Math.max(2 - up, 0) * Math.min(down, 1));
+                bsum += P * B;
+            }
+            let dsum = rows.length * d;
+            let sum = bsum + dsum;
+            let result = `共计 ${sum.toFixed(3)}/h：体积 ${bsum.toFixed(3)}/h，数量 ${dsum.toFixed(1)}/h`;
+            if (warn > 0) {
+                result += `（警告：${warn} 个种子计算可能不准确）`;
+            }
+            let span = document.createElement("span");
+            span.innerText = result;
+            let nbr = document.createElement('br');
+            e.insertBefore(nbr, br);
+            e.insertBefore(span, br);
+        }
+    }
+})
+observer.observe(document.body, { childList: true, subtree: true });