diff --git a/tools/cal_weight.py b/tools/cal_weight.py
index 1fbe6cf..add42e7 100644
--- a/tools/cal_weight.py
+++ b/tools/cal_weight.py
@@ -61,8 +61,9 @@ def cal_weight(obj, size):
     # bpy.ops.wm.save_as_mainfile(filepath=os.path.join(config.workdir, action, pid, f'{pid}-{size/10}cm.blend'))
     model_info = {}
     bm = bmesh_copy_from_object(obj)
-    model_info['volume'] = round(bm.calc_volume() / 1000)
-    model_info['weight'] = round(model_info['volume'] * 1.226)
+    # 保留三位小数
+    model_info['volume'] = round(bm.calc_volume() / 1000, 3)
+    model_info['weight'] = round(model_info['volume'] * 1.226, 2)
     print(f'{size/10}cm：体积 {model_info["volume"]}cm³, 克重 {model_info["weight"]}g')
     return model_info["weight"]