🎲 赔率换算计算器Odds Calculator
在小数赔率、分数赔率、美式赔率和隐含概率之间互相换算，并按下注金额计算可赢金额和总回报。Convert between decimal, fractional and American (moneyline) odds and implied probability, and work out the profit and total return for a stake.
使用说明与常见问题How-to & FAQ
「赔率换算计算器」是什么？What is the Odds Calculator tool?
在小数赔率、分数赔率、美式赔率和隐含概率之间互相换算，并按下注金额计算可赢金额和总回报。Convert between decimal, fractional and American (moneyline) odds and implied probability, and work out the profit and total return for a stake.
如何使用「赔率换算计算器」？How do I use the Odds Calculator tool?
在「赔率换算计算器」中，填写「输入格式」、「赔率或概率」、「下注金额」等参数，结果会随输入实时计算并显示在下方。In the Odds Calculator: Fill in "Input format", "Odds or probability", "Stake"; results are recalculated instantly as you type.
各种赔率怎么换算？How do the formats convert?
小数赔率 d = 1 + 分数赔率；美式赔率为正时 d = 1 + 美式/100，为负时 d = 1 + 100/|美式|；隐含概率 = 1/d。Decimal d = 1 + fractional; for positive American odds d = 1 + US/100, for negative d = 1 + 100/|US|; implied probability = 1/d.
隐含概率加起来为什么超过 100%？Why do implied probabilities add to more than 100%?
博彩公司在赔率中包含利润（抽水/overround），所以同一场比赛所有结果的隐含概率之和通常超过 100%，超出部分就是庄家优势。Bookmakers build in a margin (the overround), so the implied probabilities of all outcomes usually add up to more than 100% — the excess is the house edge.
计算精度如何？How precise are the results?
「赔率换算计算器」使用 JavaScript 双精度浮点数（约 15–16 位有效数字）；极大或极小的数值可能存在精度误差。The Odds Calculator uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「赔率换算计算器」免费吗？需要注册吗？Is the Odds Calculator free? Do I need an account?
「赔率换算计算器」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 Odds 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.