📉 客户流失率计算器Churn Rate Calculator
由期初客户数和流失客户数计算流失率与留存率，并换算成月流失率、年流失率和平均客户生命周期。Find the churn and retention rate from customers at the start and customers lost, then convert to a monthly and yearly churn rate and the average customer lifetime.
使用说明与常见问题How-to & FAQ
「客户流失率计算器」是什么？What is the Churn Rate Calculator tool?
由期初客户数和流失客户数计算流失率与留存率，并换算成月流失率、年流失率和平均客户生命周期。Find the churn and retention rate from customers at the start and customers lost, then convert to a monthly and yearly churn rate and the average customer lifetime.
如何使用「客户流失率计算器」？How do I use the Churn Rate Calculator tool?
在「客户流失率计算器」中，填写「期初客户数」、「期内流失客户数」、「期内新增客户数（可选）」、「统计周期（月）」等参数，结果会随输入实时计算并显示在下方。In the Churn Rate Calculator: Fill in "Customers at start", "Customers lost in the period", "New customers in the period (optional)", "Period length (months)"; results are recalculated instantly as you type.
流失率怎么算？How is churn rate calculated?
流失率 = 期内流失的客户数 ÷ 期初客户数。新增客户不进入分母，以免新客户掩盖老客户的流失。Churn rate = customers lost in the period ÷ customers at the start. New customers stay out of the denominator so they don't hide the loss of existing ones.
月流失率和年流失率怎么换算？How do monthly and yearly churn convert?
按复合方式：年流失率 = 1 − (1 − 月流失率)¹²，不是简单乘以 12。多个月的周期先按同样方式折算成月流失率。By compounding: yearly churn = 1 − (1 − monthly churn)¹², not monthly × 12. A multi-month period is first converted to a monthly rate the same way.
平均客户生命周期是什么？What is average customer lifetime?
在流失率恒定的假设下，客户平均留存的月数 ≈ 1 ÷ 月流失率。Assuming churn stays constant, the average number of months a customer stays ≈ 1 ÷ monthly churn.
计算结果可以作为最终依据吗？Can I rely on the result?
「客户流失率计算器」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 Churn Rate Calculator uses standard formulas and is for estimation only; actual figures depend on your bank, broker or tax authority's rules and rounding.
「客户流失率计算器」免费吗？需要注册吗？Is the Churn Rate Calculator free? Do I need an account?
「客户流失率计算器」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 Churn Rate 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.