Collecting Reference Tools
收藏参考工具
Collecting Reference Tools
4 个免费在线小工具，服务古董收藏学习。全部仅作历史资料参考，不提供古董鉴定、估价服务。
Four free online reference tools for antique-collecting study. For historical reference only; no antique authentication or appraisal service.
⚠️ 免责声明：全部工具仅数学与历法运算、历史资料参考，不可用于古董断代、鉴定、估价；重要决策请咨询独立专业人士。
⚠️ Disclaimer: All tools perform calendar-math or historical reference only. Must not be used for antique dating, authentication or appraisal. Consult independent experts for critical decisions.
年份距今计算器 Years-since-year Calculator
输入公元/公元前年份，计算距今多少年；支持明清年号快速填充。
Calculate years-ago from a Gregorian / BCE year; quick fill with Ming-Qing reign titles.
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干支公历换算器 Sexagenary-Gregorian Converter
六十甲子干支与公元年份双向换算，适配明清瓷器款识查询。
Bidirectional conversion between the sexagenary cycle and Gregorian years for Ming-Qing porcelain marks lookup.
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古文化·朝代年代速查表 Culture & Dynasty Era Lookup
红山、良渚、龙山、夏商周、春秋战国到秦汉至明清的起止年份与距今约多少年。
Year ranges from Hongshan, Liangzhu and Longshan through the Xia-Shang-Zhou and later dynasties to the Qing.
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拍卖藏品货币参考换算器 Currency Reference Converter
SGD 新加坡元与 CNY / USD / HKD / EUR / GBP 双向参考换算，仅市场中间参考价，不做结算或报税依据。
Bidirectional SGD ↔ CNY / USD / HKD / EUR / GBP reference conversion, mid-market rates only — not for settlement or tax filing.
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撰写收藏主题文章，欢迎引用本站工具合集页面：https://www.gudong.app/tools/。全部工具仅供学习参考，不做古董鉴定。
If you reference our collecting tools in articles, please link: https://www.gudong.app/tools/. For educational reference only, not antique authentication.