🌐 GDP 计算器（支出法）GDP Calculator (Expenditure Approach)
用支出法 GDP = C + I + G + (X − M) 计算国内生产总值，可选输入人口得出人均 GDP，输入 GDP 平减指数得出实际 GDP。Compute GDP with the expenditure approach GDP = C + I + G + (X − M); optionally add population for GDP per capita and a GDP deflator for real GDP.
使用说明与常见问题How-to & FAQ
「GDP 计算器（支出法）」是什么？What is the GDP Calculator (Expenditure Approach) tool?
用支出法 GDP = C + I + G + (X − M) 计算国内生产总值，可选输入人口得出人均 GDP，输入 GDP 平减指数得出实际 GDP。Compute GDP with the expenditure approach GDP = C + I + G + (X − M); optionally add population for GDP per capita and a GDP deflator for real GDP.
如何使用「GDP 计算器（支出法）」？How do I use the GDP Calculator (Expenditure Approach) tool?
在「GDP 计算器（支出法）」中，填写「居民消费 C」、「投资 I」、「政府购买 G」、「出口 X」、「进口 M」等参数，结果会随输入实时计算并显示在下方。In the GDP Calculator (Expenditure Approach): Fill in "Consumption C", "Investment I", "Government spending G", "Exports X", "Imports M"; results are recalculated instantly as you type.
支出法 GDP 公式是什么？What is the expenditure formula?
GDP = C（居民消费）+ I（企业投资，含存货变动）+ G（政府购买）+ NX（净出口 = 出口 − 进口）。进口要减去，是因为它已包含在 C、I、G 中但并非本国生产。GDP = C (household consumption) + I (business investment incl. inventory change) + G (government purchases) + NX (net exports = exports − imports). Imports are subtracted because they are already included in C, I and G but were not produced domestically.
名义 GDP 和实际 GDP 有什么区别？Nominal vs real GDP?
名义 GDP 按当年价格计算；实际 GDP 剔除价格变化：实际 GDP = 名义 GDP ÷ (GDP 平减指数 ÷ 100)。平减指数 125 表示价格水平比基期高 25%。Nominal GDP uses current prices; real GDP removes price changes: real = nominal ÷ (deflator ÷ 100). A deflator of 125 means prices are 25% above the base year.
单位怎么填？What units should I use?
五项使用同一单位即可（例如亿元或十亿美元），结果沿用该单位；人均 GDP 为“该单位 ÷ 人”，若用“亿元”请自行换算成元。Use the same unit for all five items (e.g. billions of dollars); results use that unit. GDP per capita is in that unit per person, so convert billions to dollars yourself if needed.
计算结果可以作为最终依据吗？Can I rely on the result?
「GDP 计算器（支出法）」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 GDP Calculator (Expenditure Approach) uses standard formulas and is for estimation only; actual figures depend on your bank, broker or tax authority's rules and rounding.
「GDP 计算器（支出法）」免费吗？需要注册吗？Is the GDP Calculator (Expenditure Approach) free? Do I need an account?
「GDP 计算器（支出法）」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 GDP Calculator (Expenditure Approach) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.