🥣 杯 ↔ 升Cups to Liters
美制杯与升互算（1 cup = 0.2365882365 L）。支持杯、升、毫升、加仑互算。US cups ↔ litres (1 cup = 0.2365882365 L). Units: cup (US), litre, millilitre, gallon (US).
点击任意一行可复制该结果；小于 0.0001 或不小于 10¹⁵ 的数值用 × 10ⁿ 科学计数法显示Click any row to copy that result. Values below 0.0001 or at least 10¹⁵ are shown in × 10ⁿ notation
使用说明与常见问题How-to & FAQ
「杯 ↔ 升」是什么？What is the Cups to Liters tool?
美制杯与升互算（1 cup = 0.2365882365 L）。支持杯、升、毫升、加仑互算。US cups ↔ litres (1 cup = 0.2365882365 L). Units: cup (US), litre, millilitre, gallon (US).
如何使用「杯 ↔ 升」？How do I use the Cups to Liters tool?
在「杯 ↔ 升」中输入数值并选择原单位，表格会同时列出换算到所有其他单位的结果，可一键复制。Enter a value in the Cups to Liters and choose the source unit; the table shows the value in every other unit at once, ready to copy.
一杯是多少升？How many litres in a cup?
1 美制液量杯 = 0.2365882365 升（约 236.6 毫升），所以 1 升 ≈ 4.227 杯。英制杯（约 284 毫升）和公制杯（250 毫升）都不同。1 US liquid cup = 0.2365882365 L (about 236.6 mL), so 1 L ≈ 4.227 cups. The imperial cup (about 284 mL) and the metric cup (250 mL) are different.
1 杯 等于多少其他单位？How much is 1 cup (US) in the other units?
1 杯 = 0.2365882365 升 = 236.5882365 毫升 = 0.0625 加仑（按定义系数计算，最多保留 10 位有效数字）。本页不接受负数：输入负值会提示错误。1 cup (US) = 0.2365882365 litre = 236.5882365 millilitre = 0.0625 gallon (US) (from the defined factors, up to 10 significant digits). Negative values are not accepted here and show an error.
有哪些选项可以调整？What options can I adjust?
「杯 ↔ 升」的设置：「数值」默认 1。每次生成结果都按当前设置处理。Settings in the Cups to Liters — "Value" default 1. The result always uses the current settings.
换算系数准确吗？Are the conversion factors exact?
「杯 ↔ 升」采用国际单位制（SI）或公认标准中的定义值作为换算系数，结果保留约 10 位有效数字。The Cups to Liters uses factors defined by the SI or other recognised standards and shows about 10 significant digits.
「杯 ↔ 升」免费吗？需要注册吗？Is the Cups to Liters free? Do I need an account?
「杯 ↔ 升」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 Cups to Liters is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.