计算分层价格折扣
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编码水平:初级
时长:10 分钟
项目类型:自定义函数
目标
- 了解解决方案的功能。
- 了解 Apps 脚本服务在解决方案中的作用。
- 设置脚本。
- 运行脚本。
关于此解决方案
如果您为客户提供分级定价系统,则此自定义函数可让您更轻松地计算价格的折扣金额。
虽然您可以使用内置函数 SUMPRODUCT
进行分层定价计算,但与此解决方案的自定义函数相比,使用 SUMPRODUCT
更复杂且灵活性更低。

运作方式
分层定价模式是指商品或服务的费用会根据购买的数量而降低。
例如,假设您有两个层级,一个层级的价格范围为 0-500 美元,可享受 10% 的折扣;另一个层级的价格范围为 501-1,000 美元,可享受 20% 的折扣。如果您需要计算折扣的总价为 700 美元,该脚本会将前 500 美元乘以 10%,将剩余的 200 美元乘以 20%,得出总折扣为 90 美元。
对于给定的总价,脚本会在分层价格表中循环遍历指定层级。对于总价格中属于某个层级的每个部分,该部分都会乘以相应层级的百分比值。结果是每个层级的计算结果之和。
Apps 脚本服务
此解决方案使用以下服务:
- 电子表格服务 - 接受给定的值,并计算要将该值的哪一部分乘以每个层级的折扣百分比。
前提条件
如需使用此示例,您需要满足以下前提条件:
- Google 账号(Google Workspace 账号可能需要管理员批准)。
- 可访问互联网的网络浏览器。
设置脚本
点击下方的按钮,复制分级定价自定义函数电子表格。此解决方案的 Apps 脚本项目已附加到电子表格。
制作副本
运行脚本
- 在您复制的电子表格中,第 16 行的表格显示了软件即服务 (SaaS) 产品的价格计算示例。
- 如需计算折扣金额,请在单元格
C20
中输入 =tierPrice(C19,$B$3:$D$6)
。最终价格更新位于单元格 C21
中。如果您所在的地区使用英文逗号作为小数点,可能需要输入 =tierPrice(C19;$B$3:$D$6)
。
查看代码
如需查看此解决方案的 Apps 脚本代码,请点击下方的查看源代码:
修改
您可以根据需要随意修改自定义函数。以下是手动刷新自定义函数结果的可选补充。
刷新缓存结果
与内置函数不同,Google 会缓存自定义函数以优化性能。因此,如果您更改自定义函数中的某些内容(例如正在计算的值),系统可能不会立即强制更新。如需手动刷新函数结果,请按以下步骤操作:
- 如需向空白单元格添加复选框,请依次点击插入
> 复选框。
- 将包含复选框的单元格添加为自定义函数的额外参数。例如,如果您向单元格
D20
添加复选框,请将单元格 C20
中的 tierPrice()
函数更新为 =tierPrice(C19,$B$3:$D$6,D20)
。
- 选中或取消选中相应复选框,以刷新自定义函数结果。
贡献者
此示例由 Google 在 Google 开发者专家的帮助下维护。
后续步骤
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-08-31。
[null,null,["最后更新时间 (UTC):2025-08-31。"],[[["\u003cp\u003eThis Google Apps Script custom function simplifies tiered pricing calculations in Google Sheets, offering a more straightforward approach than using \u003ccode\u003eSUMPRODUCT\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe function calculates discounts by iterating through pricing tiers, applying the corresponding percentage discount to the portion of the total price falling within each tier.\u003c/p\u003e\n"],["\u003cp\u003eTo use the function, you need to provide the total price and a table specifying the pricing tiers, start and end values, and discount percentages.\u003c/p\u003e\n"],["\u003cp\u003eThe script utilizes the Spreadsheet service to access and process data within the sheet.\u003c/p\u003e\n"],["\u003cp\u003eYou can manually refresh the custom function's results by adding a checkbox and including its cell reference as an additional parameter in the function call.\u003c/p\u003e\n"]]],[],null,["# Calculate a tiered pricing discount\n\n**Coding level** : Beginner \n\n**Duration** : 10 minutes \n\n**Project type** : [Custom function](/apps-script/guides/sheets/functions)\n\nObjectives\n----------\n\n- Understand what the solution does.\n- Understand what the Apps Script services do within the solution.\n- Set up the script.\n- Run the script.\n\nAbout this solution\n-------------------\n\nIf you offer a tiered pricing system for your customers, this custom function\nmakes it easier to calculate the discount amounts for your prices.\n\nThough you could use the built-in function `SUMPRODUCT` to make a tiered pricing\ncalculation, using `SUMPRODUCT` is more complex and less flexible than this\nsolution's custom function.\n\n### How it works\n\nA tiered pricing model means that the cost of goods or services goes down\nbased on the quantity purchased.\n\nFor example, imagine you have two tiers, one that ranges from $0-$500 and is\ndiscounted by 10% and one that ranges from $501-$1,000 and is discounted by 20%.\nIf the total price you need to calculate a discount for is $700, the script\nmultiplies\nthe first $500 by 10% and the remaining $200 by 20%, for a total discount of\n$90.\n\nFor a given total price, the script loops through the specified tiers in the\ntier pricing table. For each portion of the total price that falls\nwithin a tier, that portion is multiplied by the tier's associated percent\nvalue. The result is the sum of each tier's calculation.\n\n### Apps Script services\n\nThis solution uses the following service:\n\n- [Spreadsheet service](/apps-script/reference/spreadsheet)--Takes the given value and calculates what portion of the value to multiply by each tier's percent discount.\n\nPrerequisites\n-------------\n\nTo use this sample, you need the following prerequisites:\n\n- A Google Account (Google Workspace accounts might require administrator approval).\n- A web browser with access to the internet.\n\nSet up the script\n-----------------\n\nClick the button below to make a copy of the **Tier pricing custom function**\nspreadsheet. The Apps Script project for\nthis solution is attached to the spreadsheet.\n\n[Make a copy](https://docs.google.com/spreadsheets/d/13X-3pz8P_sfAyNqUJrGe0HdgzKARIMxC6Y6xZDAF7M0/copy)\n\nRun the script\n--------------\n\n1. In your copied spreadsheet, the table at row 16 shows a sample price calculation for a Software as a Service (SaaS) product.\n2. To calculate the discount amount, in cell `C20`, enter `=tierPrice(C19,$B$3:$D$6)`. The final price updates in cell `C21`. If you're in a location that uses decimal commas, you might need to enter `=tierPrice(C19;$B$3:$D$6)` instead.\n\nReview the code\n---------------\n\nTo review the Apps Script code for this solution, click **View source code**\nbelow: \n\n#### View source code\n\n### Code.gs\n\n\u003cbr /\u003e\n\nsolutions/custom-functions/tier-pricing/Code.js \n[View on GitHub](https://github.com/googleworkspace/apps-script-samples/blob/main/solutions/custom-functions/tier-pricing/Code.js) \n\n```javascript\n// To learn how to use this script, refer to the documentation:\n// https://developers.google.com/apps-script/samples/custom-functions/tier-pricing\n\n/*\nCopyright 2022 Google LLC\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n https://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n*/\n\n/**\n * Calculates the tiered pricing discount. \n * \n * You must provide a value to calculate its discount. The value can be a string or a reference\n * to a cell that contains a string.\n * You must provide a data table range, for example, $B$4:$D$7, that includes the \n * tier start, end, and percent columns. If your table has headers, don't include\n * the headers in the range.\n * \n * @param {string} value The value to calculate the discount for, which can be a string or a \n * reference to a cell that contains a string.\n * @param {string} table The tier table data range using A1 notation.\n * @return number The total discount amount for the value.\n * @customfunction\n * \n */\nfunction tierPrice(value, table) {\n let total = 0;\n // Creates an array for each row of the table and loops through each array.\n for (let [start, end, percent] of table) {\n // Checks if the value is less than the starting value of the tier. If it is less, the loop stops.\n if (value \u003c start) {\n break;\n }\n // Calculates the portion of the value to be multiplied by the tier's percent value.\n let amount = Math.min(value, end) - start;\n // Multiplies the amount by the tier's percent value and adds the product to the total.\n total += amount * percent;\n }\n return total;\n}\n```\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nModifications\n-------------\n\nYou can edit the custom function as much as you'd like to fit your needs. Below\nis an optional addition to manually refresh custom function results. \n\n#### Refresh cached results\n\n\nUnlike built-in functions, Google caches custom functions to optimize\nperformance. Therefore, if you change something within your custom\nfunction, such as a value that's being calculated, it might not immediately\nforce an update. To refresh the function result manually, take the following\nsteps:\n\n1. Add a checkbox to an empty cell by clicking **Insert** \\\u003e **Checkbox**.\n2. Add the cell that has the checkbox as an extra parameter of the custom function. For example, if you add a checkbox to cell `D20`, update the `tierPrice()` function in cell `C20` to `=tierPrice(C19,$B$3:$D$6,D20)`.\n3. Check or uncheck the checkbox to refresh the custom function results.\n\nContributors\n------------\n\nThis sample is maintained by Google with the help of Google Developer Experts.\n\nNext steps\n----------\n\n- [Custom functions in Google Sheets](/apps-script/guides/sheets/functions)\n- [Extending Google Sheets](/apps-script/guides/sheets)"]]