Per-Key Quality Testing

In order to test the quality and consistency of a keyboard, we are using a texture analyser that is programmed to measure and display the actuation force of the standard keyboard keys. By measuring the actuation force of every key, the quality and consistency of the keyboard can be quantified. It can also reveal design issues, such as the larger keys being far softer to press than the main keys of the keyboard. The actuation force is measured in Centinewton (cN). Some companies use another figure, gram-force (gf). The conversion formula is 1 cN = 1.02 gf (i.e. they are about the same). A high-quality keyboard should be as consistent as possible, with an average actuation force as near to the manufacturer's specs as possible and a disparity of less than ±10%. Greater differences are likely to be perceptible by users. It is worth noting that there is typically variance among keyboards, although most keyboard companies will try and maintain consistency - as with other reviews, we're testing our sample only.

Keychron lists the following specifications for its switches. Our unit has the brown versions.

The machine we use for our testing is accurate enough to provide readings with a resolution of 0.1 cN. For wider keys (e.g. Enter, Space Bar, etc.), the measurement is taking place at the center of the key, right above the switch. Note that large keys generally have a lower actuation force even if the actuation point is at the dead center of the key. This is natural, as the size and weight of the keycap reduce the required actuation force. For this reason, we do display the force required to actuate every key but we only use the results of the typically sized keys for our consistency calculations. Still, very low figures on medium-sized keys, such as the Shift and Enter keys reveal design issues and can easily be perceptible by the user.

At first glance, the Keychron K3 appears to be somewhat inconsistent. This is due to the minor tolerances of the optical sensors that the switches are using. As the travel distance is very short, even small actuation point differences translate to large differences in force. The average actuation force is 53 cN, which seems high for Brown-type switches, but it actually is not (as with the table above, Keychron quotes 50 +/- 10). Again, due to the very short travel distance, the resistance of the springs must be higher, or the keys will feel extremely spongy and easily bottom down.

Hands-on Testing

I always try to use every keyboard that we review as my personal keyboard for at least a week. My typical weekly usage includes a lot of typing (about 100-150 pages), a few hours of gaming, and some casual usage, such as internet browsing and messaging. I personally prefer Cherry MX Brown or similar (tactile) switches for such tasks. As I frequently use a laptop, the 75% layout of the Keychron K3 was not an issue for me. Users who only or mainly use 100% keyboards will definitely have to take a short learning curve.

Not only the size but also the extremely low height and travel make the Keychron K3 feeling more like a laptop keyboard than a mechanical keyboard. Regardless, the typing experience is exceptional. The keyboard is very responsive and the feeling of each keypress is fantastic, with very little fatigue even after using it for several hours straight. Its stock Brown switches feel fantastic and are relatively quiet, making the Keychron K3 ideal for productivity in public places. Only in very quiet places, such as small libraries, the use of this keyboard would be annoying to other people in the immediate area.

For gaming, the Keychron K3 does not offer any advanced features other than its very low-profile and short travel switches. Theoretically, the shorter travel distance would cut a few milliseconds off someone’s reaction time. However, any difference is minuscule and has zero real-world meaning. If anything, the lag of the Bluetooth transmitter is much greater than any advantage the shorter travel could ever offer. The zero gap between the top rows also is not ideal for FPS/Action games. It is not a bad keyboard for gaming though, as it is very responsive and exceptionally comfortable. As long as the user is content with the 75% layout and doesn’t seek advanced features, the Keychron K3 will not disappoint.

The battery life of the Keychron K3, with the keyboard used solely for productivity, was roughly 80 hours with the backlighting turned off. That is not bad at all but was lower than the advertised 99 hours. In the manufacturer’s defense, my typical workday can be brutal for any keyboard. Turning the backlighting on and maxed out, the battery life dropped down to about 30 hours, close to the manufacturer’s 34-hour specification.


At first sight, the Keychron K3 feels as if it is more of a fashion item rather than a proper mechanical keyboard, with our initial thoughts being that the company is trying to put too many eggs into one basket. However, the K3 actually is a surprisingly good mechanical keyboard for those that need to combine mobility and productivity with a tiny bit of fanciness for under $100.

The quality of the Keychron K3 is very good, especially considering the price range and the features of the keyboard. Although the design is relatively simple, the materials are great and the assembly job is exceptional. Furthermore, even if a switch gets damaged, a whole pack of switches is just $19 and they are easily replaceable, which bodes great for those who like keeping their devices around for as long as possible. It is also worthwhile to mention that the company was very quick to listen to feedback, redesigned the rear cover and added rear feet to the retail version of the keyboard. This is a very rare choice for any company to make, as the vast majority of designs are never altered up to their end-of-life, signifying that Keychron actually cares about having the best possible version of a product in circulation.

In terms of aesthetics, the Keychron K3 is a little bit all over the place. It is designed to be very thin and elegant, matching a clean, modern desktop. The orange keycaps stand out too much in such an environment but, fortunately, the company includes normal grey keycap replacements for these. The RGB backlighting also is a little extravagant for visually calm and quiet environments but could work under certain circumstances.

The hands-on performance of the Keychron K3 is unexpectedly good, especially for a keyboard with such a short key travel. It is amazingly comfortable and feels great, even after hours of typing. However, it has few advanced features and virtually zero programmability, which will dishearten advanced gamers and coders alike. The 75% layout greatly reduces the footprint of the keyboard and makes it ideal for 14” or larger laptop bags but also requires a learning curve if one is not used to working with such layouts.

Keychron designed the K3 mainly with mobility in mind, for users who need a high-quality keyboard that fits in their bag. Although its battery life cannot compete with electronic keyboards designed for maximum mobility, it is long enough to get most users through a regular business trip or short vacation, especially when the backlighting is turned off. If there is no compartment in your bag just for the keyboard though, it would be wise to purchase the travel pouch offered by Keychron, or another similar pouch, as the keycaps will easily come off if the keyboard is not secured well.

The Keychron K3 is listed on the company website for $84 with the RGB backlights, or $74 with the white backlight.



Introduction, Packaging, and the Keyboard
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  • grant3 - Wednesday, July 28, 2021 - link

    You're right that you can easily outspend a G915 if your experimental surgery on a keychron wrecks the motherboard once or twice.

    but if you're not satisfied with the Gaterons on a K1, would you really be satisfied with the Kailhs on a G915 anyways? :D

    i have both, and both are good with flaws. But ultimately the G915 I could make a lot quieter.
  • fazalmajid - Tuesday, July 13, 2021 - link

    As it turns out, they just launched their Kickstarter for the K7, which is basically the same thing with the function keys removed. I’ll take the lighter weight and bulk over the minor inconvenience of pressing a Fn key to access th F-keys (I don’t do that often anyway). And no way you can accidentally hit the screen shot key of the K3 any more and put yourself in a modal screen selection state where your key presses are discarded.
  • Findecanor - Tuesday, July 13, 2021 - link

    BTW. The Caps Lock key looks stuck in the pressed state in most of the pictures.
    I suspect that the author could have tried to pull that key and replace the switch but that getting the stabilisers back in position isn't that easy.
  • INCSlayer - Tuesday, July 13, 2021 - link

    i have a nordic layout K2 which is the same size but with "normal" size switches and i love it.
  • ZolaIII - Tuesday, July 13, 2021 - link

    Meh I wanted a little more (both functional and programming) with regular wireless (WiFi) and small input lagg and I got it for less money. Bought Redragon Vishnu for some 75$ and all do macros functionality is limited wireless so far I am satisfied with it.
  • Wereweeb - Tuesday, July 13, 2021 - link

    Not low profile. Apples to oranges comparison.

    Plus, Redragon uses the old Outemu switches, and those are known for bad QC.
  • ZolaIII - Wednesday, July 14, 2021 - link

    Whosent a comparison to start with. I am sure that you know how lo profile switches are absolutely a gimmick (with possible exception of HyperX Silver's) and not a very handy. Othemus are cheap (not that this ones are any better) but at least it comes with PBT key caps and you get couple of spare switches (wrist rest, bigger battery...).
    Wireless RGB mechanical TKM are still a rare fruit (especially with additional keys not to mention dedicated macro one's) to make a direct comparison anyway.
  • Lord of the Bored - Wednesday, July 14, 2021 - link

    WiFi keyboard? You MUST be joking.
  • ZolaIII - Wednesday, July 14, 2021 - link

    RF 2.4 GHz dongle, not Wi-Fi...
  • R3Z3N - Tuesday, July 13, 2021 - link

    Bought this and the K1 a couple months ago. I just wish BT disconnect time could be adjusted. Both have issues connecting back to both my work mac and home PC after turning off.

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