📊 股票盈亏计算器Stock Profit Calculator
输入买入价、卖出价、股数和买卖佣金，计算股票交易的盈亏金额、收益率、盈亏平衡价，可选持有天数计算年化收益率。Calculate profit or loss on a stock trade from buy price, sell price, shares and commissions, with return %, break-even price and optional annualised return from the holding period.
使用说明与常见问题How-to & FAQ
「股票盈亏计算器」是什么？What is the Stock Profit Calculator tool?
输入买入价、卖出价、股数和买卖佣金，计算股票交易的盈亏金额、收益率、盈亏平衡价，可选持有天数计算年化收益率。Calculate profit or loss on a stock trade from buy price, sell price, shares and commissions, with return %, break-even price and optional annualised return from the holding period.
如何使用「股票盈亏计算器」？How do I use the Stock Profit Calculator tool?
在「股票盈亏计算器」中，填写「股数」、「买入价」、「卖出价」、「买入佣金」、「卖出佣金」等参数，结果会随输入实时计算并显示在下方。In the Stock Profit Calculator: Fill in "Shares", "Buy price", "Sell price", "Buy commission", "Sell commission"; results are recalculated instantly as you type.
盈亏平衡价怎么算？How is the break-even price calculated?
盈亏平衡卖出价 = (股数 × 买入价 + 买入佣金 + 卖出佣金) ÷ 股数，即卖出价达到这个数时扣完所有费用正好不赚不亏。Break-even = (shares × buy price + buy commission + sell commission) ÷ shares — the sell price at which you exactly cover all costs.
包含税和分红吗？Are taxes and dividends included?
不包含。资本利得税、印花税（A 股卖出印花税请用A 股交易手续费计算器）和持有期间的分红都没有计入；股数可以填小数，以便计算碎股交易；年化收益率按复利 (卖出净额 ÷ 成本)^(365 ÷ 天数) − 1 计算。No. Capital gains tax, stamp duty (see the A-share trading fee calculator for China) and dividends are not included; shares may be fractional for fractional-share trades; the annualised return is (proceeds ÷ cost)^(365 ÷ days) − 1.
计算结果可以作为最终依据吗？Can I rely on the result?
「股票盈亏计算器」按标准公式计算，结果仅供参考；实际金额以银行、券商或税务机关的规则和四舍五入方式为准。The Stock Profit Calculator uses standard formulas and is for estimation only; actual figures depend on your bank, broker or tax authority's rules and rounding.
「股票盈亏计算器」免费吗？需要注册吗？Is the Stock Profit Calculator free? Do I need an account?
「股票盈亏计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Stock Profit Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.