Rule of 72 Calculator - a free online tool to estimate the time required to double your investment and project wealth growth. No installation needed, works instantly in your browser.
免费在线72法则计算器，输入年化收益率估算资金翻倍时间，并支持精确翻倍、指定倍数达成时间与复利终值测算。
投资者需要快速估算资金翻倍所需时间或复利增长结果，但手动计算复杂且容易出错。
输入：年化收益率（必填）、初始本金（可选）、复利年限（可选）、目标倍数（可选）、货币符号（可选）。输出：72法则估算翻倍时间、精确翻倍时间、复利终值（若提供本金和年限）、达成目标倍数所需时间（若提供倍数）。
适合需要快速估算投资翻倍时间或复利增长的投资者、理财规划者及金融爱好者。
Hash Calculator - free online tool to compute MD5, SHA1, and SHA256 hashes instantly. No installation required.
Trigonometry Calculator - Online sin/cos/tan tool. Free, instant, no installation required.
Stock Profit & Loss Calculator - an online tool to estimate A-share trading gains and fees. Free, instant, no installation required.
Free online tool to calculate take profit and stop loss target prices, along with potential profit and loss. No installation required.
Grid Trading Calculator - Free online tool to calculate grid levels and capital allocation. No installation required, works instantly in your browser.
Free online tool to calculate your IPO subscription quota for Shanghai and Shenzhen stock markets. No installation required.