How to enter infinity (∞) in the Xiaomi calculator: all ways + hidden functions

Have you ever tried to count something “infinite” on a Xiaomi calculator but couldn’t find the ∞ button? It turns out that the infinity symbol is hidden deeper than it seems — and can be invoked in several non-obvious ways. In this article, we’ll go through all the working methods for the standard and engineering calculator, including little-known keyboard combinations and workarounds for different versions of MIUI.

It’s important to understand that infinity in the calculator is not just a symbol, but a mathematical constant that can be used in calculations (for example, for limits or dividing by zero). On some Xiaomi models (especially Android 12+), the function is hidden due to the features of the interface, but it is easy to return.

1. Standard method: Calculator engineering mode

The most reliable method is to switch to engineering mode, where the ∞ character is available by default.

1. Open the Calculator app on your Xiaomi/Redmi/POCO.
2. Touch the badge. ☰ (three horizontal lines) in upper left corner.
3. From the menu, select the Engineering Calculator (or Scientific Calculator, depending on the version of MIUI).
4. Scroll to the right and you will find the ∞ button (usually under Constants or Functions).

If there is no button, try turning the screen: on some models (for example, Xiaomi 12 Pro), the engineering mode is activated automatically when horizontally orientation. Also check if the panel with additional features is hidden - sometimes you need to swipe it up.

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On MIUI 14+, the engineering calculator may be called "Extended." If it's not on the menu, update the app via Google Play or the App Store (for global versions).

2. Secret key combination for quick access

Few people know, but Xiaomi calculators have a hidden combination that immediately outputs the infinity symbol without switching modes. This method works on most devices with MIUI 12-15:

1 ÷ 0 =

Just type 1, press ÷ (division), then 0 and =. Instead of error, the calculator will show ∞. This technique works because dividing by zero in mathematics is considered infinity (although technically it is uncertain, but Xiaomi makes it easier for users to output).

⚠️ Note: On some firmware (e.g. HyperOS for Xiaomi 14), this method may give an Err error. In this case, use the engineering mode or alternative methods from the following sections.

3. Alternative input via the clipboard

If none of the previous methods worked, you can copy the ∞ character from another source and paste it into the calculator. This is a universal workaround that works even on older versions of MIUI:

• 📱 Copy the infinity symbol from here: ∞ (Just select and click "copy»).
• 🔄 Open the Xiaomi calculator and hold the input field with your finger until the Insert menu appears.
• 📋 Insert a symbol. Now it can be used in computing (e.g, ∞ + 5 = ∞).

This method is particularly useful for POCO F3 and other devices where the engineering calculator is missing because of customized firmware, and the main disadvantage is that the symbol will not be saved after the application is closed, so you will have to copy it again.

4. Use of third-party calculators with support for ∞

If Xiaomi’s built-in calculator stubbornly refuses to show infinity, installing an alternative app will solve the problem.-3 tested:

Third-party calculators not only solve the infinity problem, but also offer advanced features such as computation of limits, working with matrices, and even plotting. For example, in HiPER Scientific you can type expressions like lim(x→∞) 1/x and get an accurate result.

5. Infinity through mathematical functions (for advanced ones)

If you want to use infinity in your calculations, and not just display a symbol, you can use mathematical functions that imply it.

• 🔢 Enter tan(90) – the tangent of 90 degrees tends to infinity and the calculator can give you the ∞ or Err (depending on the model).
• 📈 Use ln(0) – the natural logarithm of zero also gives infinity (in some firmwares).
• ∞ Try it. 1/0 exp(1000) — The exponential number is approaching ∞.

These methods don’t always work, as Xiaomi can handle such cases as bugs, but on Android 13+ and HyperOS devices, the odds are higher, as the system has become “smarter” in terms of mathematical logic.

Try 1 ÷ 0 =

Switch to Engineering Mode

Copy the ∞ character from the browser

Install a third-party calculator (e.g. HiPER)

Update MIUI last-minute-->

6. bypasses for devices without an engineering calculator

On some Redmi budget models (e.g. Redmi 9A or POCO M3), the engineering calculator may not be available at all, in which case one of the following tricks will help:

1. Use Google Assistant: say, "OK, Google, count infinity," and the system will show the ∞ character in the search results. From there you can copy it.
2. Enter in the browser: open Chrome and enter data:text/html,∞ in the address bar – the symbol will appear on the empty page.
3. Create a shortcut: If you often need infinity, save the ∞ character in Notes or on the home screen as a widget.

You can also use the Symbol Keyboard app, which has a full table of special characters, including ∞, which is relevant for users who often work with mathematical expressions.

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On devices with MIUI 14+ and HyperOS, the infinity symbol can be displayed automatically when divided by zero, even if the ∞ button is not in the interface.

7. Frequent mistakes and how to avoid them

When trying to get infinity on a Xiaomi calculator, users often face typical problems.

• ❌ Err instead of Err ∞: This means that your version of the calculator doesn't support infinity as a result. Try updating the app or using third-party software.
• ❌ No Engineering Mode button: Some firmware (especially Chinese) have disabled this mode. MIUI use ADB to unlock hidden functions.
• ❌ Symbol ∞ not copied: Check if the clipboard blocks any application (e.g. Clean Master.

If none of the methods work, you may have a stripped-down version of the calculator installed on your device (e.g., some POCOs for the Indian market), in which case you only need to install an alternative application or use an online calculator (e.g., Desmos).

⚠️ Note: On root-right devices, you can manually edit the file /system/app/Calculator/Calculator.apk, add support ∞, But it's risky and it can cause system failures.

FAQ: Answers to popular questions