Getting ready to install a smart lock but feeling confused about all those door size numbers? Don't worry - you're definitely not alone. Think of it like buying shoes: you need the right size for a comfortable fit. The good news is, once you understand the basics, picking the perfect Aqara smart lock becomes a whole lot easier. Let's break it down together!
Why Door Dimensions Matter for Smart Locks
Okay, let's be real - nobody wants that sinking feeling when their shiny new smart lock arrives and… it doesn't fit. It's like trying to wear someone else's glasses - just doesn't work right!
Here's the deal: door dimensions are like the secret handshake to smart lock success. Too small? You might as well leave your door unlocked. Too big? You're looking at installation headaches and a lock that never quite works smoothly. But get it just right, and you've got seamless security that plays nicely with your other Aqara smart devices. Pretty cool, right?
A Guide to Common Standard Door Sizes
Before we dive into which Aqara lock is your soulmate, let's get familiar with the usual suspects in the door world. Check out this cheat sheet:
|
Door Type |
Standard Width |
Standard Height |
Thickness Range |
|
Inside Doors |
28-32 inches |
80 inches |
1⅜-1¾ inches |
|
Front Doors |
36 inches |
80 inches |
1¾-2 inches |
|
Garage Side Doors |
32 inches |
80 inches |
1⅜-1¾ inches |
Quick tip: Most interior doors are like the reliable friends in your life - they come in standard sizes that work for pretty much everyone. Your bedroom door? Probably 30 inches wide. That fancy front door? Almost always 36 inches. See, you're already getting the hang of this!
Choosing the Right Aqara U-Series Smart Lock for Your Door
Now that you're well-versed in standard door sizes, it's time to zero in on the perfect Aqara U-series smart lock for your specific door needs. Aqara offers a range of U-series locks, each designed to meet different requirements and preferences. Let's take a closer look.
Aqara U100: The Versatile All-Rounder

We've talked about door sizes, and now it's clear that the Aqara U100 is a lock that can fit right into your standard-sized door setup, whether it's an interior or exterior one. What makes the U100 stand out?
- Multiple Unlocking Methods: First off, the Aqara U100 is a real champ when it comes to flexibility. It supports fingerprint, password, NFC card, and Apple Home Key. This means you've got options. Whether your hands are full and you want to use the NFC card, or you prefer the quick and easy fingerprint unlock, the U100 has got you covered.
- Smooth Fingerprint Unlock: Aqara has really put in the work here. They've customized the fingerprint module and optimized the algorithm. As a result, you get a super smooth fingerprint-unlocking experience. No more fumbling around, just a seamless entry every time.
- Smart Home Integration: The U100 doesn't stop at just unlocking your door. You can configure it through the Aqara Home app. And here's the exciting part - it plays well with other Aqara smart devices. Imagine coming home, unlocking the door with your fingerprint, and instantly, the lights turn on, and the thermostat adjusts to your preferred temperature. All these smart automations are possible with the U100. So, if you're looking for a lock that does it all and fits standard door dimensions, the U100 is a top choice.
In short, the Aqara U100 is the go-to for those who want a lock that combines functionality, convenience, and smart home integration, all in one package.
Aqara U200: The Sleek Mortise Lock Upgrade

After understanding the importance of door sizes, it's evident that if you have a mortise-style door, the Aqara U200 is a lock you should consider. But what makes it special?
- Modern Mortise Design: The Aqara U200 takes the traditional mortise lock and gives it a modern, sleek makeover. If you've been eyeing an upgrade from your old-fashioned mortise lock to a smart one, this is the lock for you. It not only looks great but also retains the security features that mortise locks are known for.
- Matter over Thread Support: The U200 supports Matter over Thread technology, allowing for seamless integration with various smart home systems and easy management through the Aqara Home app.
- Security and Ease-of-Use: The U200 prioritizes security. It comes equipped with advanced security features to ensure your home's safety. Whether for a front door that needs to impress and provide a high level of security, or for other busy areas of the home, the U200 is perfect.
To sum up, the Aqara U200 is perfect for those who want to blend modern smart-lock technology with the classic mortise-lock design, all while ensuring top-notch security and user convenience.
Aqara U300: The Integrated Handle & Lock Solution

Now that we've covered door sizes and how they relate to smart locks, the Aqara U300 offers a unique solution for your standard-sized doors. What sets this lock apart?
- All-in-One Design: The Aqara U300 is a game-changer with its integrated handle and smart-lock design. It's not only convenient but also gives your door a modern and streamlined look. And the best part? It fits standard door dimensions like a glove, making installation a breeze.
- Variety of Unlocking Options: Just like its siblings, the U300 offers fingerprint, password, and NFC card unlocking. But the integrated design takes the user experience to a new level. Whether you're using it on an interior door for easy access or on an exterior door for added security, the U300 is up to the task. If you're after a lock that combines style, functionality, and ease of use, the U300 is definitely worth considering.
In conclusion, the Aqara U300 is ideal for those who want a contemporary, all-in-one smart-lock solution that's both easy to install and operate, making it a great addition to any home with standard-sized doors.
Aqara U200 Lite: Simple & Cost Friendly
The Aqara U200 Lite is an excellent option for those seeking a more budget-friendly yet high-performing mortise-type smart lock. Here are its selling points:
- Mortise-Fitting Design: Just like the U200, it's designed to fit the mortise lock pocket of standard-sized mortise doors. This ensures a proper and secure fit, which is crucial for the functionality and security of the lock.
- Multiple Unlocking Methods: Supports multiple unlocking methods. It supports Bluetooth, remote control, voice, and NFC cards.
- Smart Home Integration: The U200 Lite integrates seamlessly with major smart home platforms. You can use it with Aqara Home, Apple Home (HomeKit), Google Home (Google Assistant), Samsung Smartthings, and Amazon Alexa.
The U200 Lite is suitable for users with a minimalist lifestyle who want to save costs and enjoy exploring smart home automation scenarios.
Compatibility with Smart Home Platforms
One of the major concerns for potential clients when choosing smart home devices is compatibility. Aqara, however, has got you covered. The Aqara U-series smart locks are compatible with multiple smart home platforms, including Apple Home (Apple HomeKit), Google Home (Google Assistant), Amazon (Alexa), and Samsung (SmartThings).
This means that no matter which smart home ecosystem you're already invested in, you can easily integrate your Aqara U-series smart lock. For example, if you're an Apple user and have an iPhone and other Apple HomeKit-enabled devices, you can use Siri to lock or unlock your Aqara U100, U200, or U300. Similarly, if you're a Google Home user, you can use voice commands through the Google Assistant to control your Aqara smart lock. This wide-ranging compatibility ensures that you can create a seamless smart home experience.
How to Measure Your Door for an Aqara Lock
Don't sweat the measuring part - I'll walk you through it step by step. Grab a tape measure and let's do this!
Measuring Made Simple
- Check Door Thickness Just measure the edge of your door in a couple of spots. Most Aqara locks are cool with doors between 1⅜ to 2 inches thick.
- Find the Backset Sounds technical, but it's just measuring from the door edge to the center of that existing lock hole. Usually it's 2⅜ or 2¾ inches.
- Peek at the Holes That big main hole for the lock? It's usually 2⅛ inches across. Just make sure yours looks similar.
- Which Way Does Your Door Swing? Stand outside your door. Hinges on the left? That's left-handed. On the right? You guessed it - right-handed.
Aqara boasts a user-friendly setup. Whether through a physical installation (details provided) or configuration via the Aqara Home app, the setup process is remarkably simple. You can quickly add users, set up different unlocking methods, and configure smart home integration.
FAQ
Q1: Can I install an Aqara smart lock on a non-standard sized door?
Sometimes, you can. Aqara has some adaptors and accessories. But it's best to ask Aqara's customer support before you buy. They can tell you if it'll work.
Q2: Do I need a pro to install an Aqara smart lock?
Aqara smart locks are made to be easy to install. The package has a detailed guide. But if you're not sure about doing it yourself, it's better to hire a professional locksmith. They can make sure it's installed right.
Q3: How do I know if my Aqara smart lock is compatible with my smart home system?
Aqara smart locks work with lots of smart home platforms. Like Apple Home, Xiaomi Mi Home, Google Home, Amazon Alexa, and Samsung SmartThings. Check the product specs on the Aqara website or in the manual. That'll tell you if it's compatible with your system.
Conclusion
See? That wasn't so bad! Now you're armed with all the knowledge to pick the perfect Aqara smart lock. No more guessing games, no more crossed fingers during installation - just smart, seamless security that actually fits.
Ready to make your life easier? Find your perfect Aqara lock and join the smart home revolution today!
P.S. Still have questions? That's what we're here for! Measuring tape in one hand, smartphone in the other - you've got this!