Scored using Keyboards Methodology v1.0
Keyboards Methodology v1.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Keyboards Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
Explore Keyboards Methodology v1.0

Keychron K3 Ultra Slim Wireless Review | 64 Data compared

Avg. price:~£90Layout size:75%Connection type:USB / BluetoothSwitch type:mechanical / opticalPolling rate:1000 Hz

Keychron K3 Ultra Slim Wireless Review: Compare 64 technical specifications and user reviews to see how this product ranks in the Keyboards category and whether it is worth buying.

Keychron K3 Ultra Slim Wireless
7.5/10

Overall score

Score
7.5/ 10
✕
What it is
An overall evaluation of the keyboard's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best keyboards on the market.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

80%

7.2

Technical score

20%

8.9

User score

â–²Better than 78% of keyboards
8.3

Value for money

Value for money
8.3/ 10
✕
What it is
An indicator that combines the keyboard's overall rating with its cost.
When it matters
When you are looking for a keyboard that offers a strong balance of performance, features, and price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

7.5

Overall score

30%

10

Price

â–²Better than 84%
7.2

Technical score

Technical score
7.2/ 10
✕
What it is
An assessment of technical performance for products in the Keyboards category across these key areas: Switches, Design, Connectivity & Power, Features, Materials.
When it matters
When you want to compare keyboards based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

34%

7.6

Connectivity & Power

28%

5.6

Switches

20%

9.0

Materials

12%

6.3

Features

6%

7.6

Design

â–²Better than 67%
8.9

User score

User score
8.9/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the keyboard.
When it matters
When you want to understand how a keyboard performs in daily use or gaming and how reliable it is in terms of typing feel, noise level, comfort, and long-term durability.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.6

User ratings

30%

9.6

Number of reviews

Based on ratings from across the web.
â–²Better than 84%
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of keyboard Keychron K3 Ultra Slim Wireless

Technical score
Technical score
7.2/ 10
✕
What it is
An assessment of technical performance for products in the Keyboards category across these key areas: Switches, Design, Connectivity & Power, Features, Materials.
When it matters
When you want to compare keyboards based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

34%

7.6

Connectivity & Power

28%

5.6

Switches

20%

9.0

Materials

12%

6.3

Features

6%

7.6

Design

7.2
User score
User score
8.9/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the keyboard.
When it matters
When you want to understand how a keyboard performs in daily use or gaming and how reliable it is in terms of typing feel, noise level, comfort, and long-term durability.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.6

User ratings

30%

9.6

Number of reviews

Based on ratings from across the web.
8.9
Popularity
Popularity
9.6/ 10
✕
What it is
An indicator based on the number of reviews received by the keyboard.
When it matters
When you prefer a keyboard that has already been chosen and reviewed by many other users.
Score distribution
â–¼
<55-66-77-88-99-10
Popularity:
Keychron K3 Ultra Slim Wireless has a popularity score of 9.6 points, which is higher than that of 88.5% of products in this category.
9.6
Value for money
Value for money
8.3/ 10
✕
What it is
An indicator that combines the keyboard's overall rating with its cost.
When it matters
When you are looking for a keyboard that offers a strong balance of performance, features, and price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

70%

7.5

Overall score

30%

10

Price

8.3
Switch type
mechanical / optical
Switch feel
linear / tactile / clicky
Switch name
Gateron Low Profile Mechanical
Actuation force
50 g
Min actuation distance
1.5 mm
This keyboard has a minimum actuation distance of 1.5 mm, which is shorter than 52.6% of keyboards and equal to 3.9% of keyboards.
Show more
Keyboard type
?
Layout size
75%
Layout standard
?
N. of keys
84
This keyboard has 84 keys, which is fewer than 55.7% of keyboards and equal to 6.1% of keyboards.
Profile
low-profile
Show more
Connection type
USB / Bluetooth
This keyboard offers USB / Bluetooth connectivity, which is more versatile than 42.7% of keyboards and equal to 14.3% of keyboards.
Multi-device pairing
yes
This keyboard supports multi-device pairing. 4.5% of keyboards support multi-device pairing.
Bluetooth version
5.1
This keyboard uses Bluetooth 5.1, which is newer than 67% of keyboards and equal to 23.5% of keyboards.
Mac compatibility
?
Battery life
?
Show more
RGB lighting
yes
This keyboard has RGB lighting. 12.4% of keyboards have RGB lighting.
Per-key RGB
yes
This keyboard has per-key RGB lighting. 27.6% of keyboards have per-key RGB lighting.
RGB zones
84
This keyboard has 84 RGB zones, which is more than 51.7% of keyboards and equal to 6.4% of keyboards.
Underglow / side lighting
no
This keyboard does not include underglow lighting. 8% of keyboards include underglow lighting.
Backlight direction
north-facing
Show more
Case material
aluminum/plastic
Plate material
aluminum
Keycap material
ABS
Keycap profile
LSA
Legend method
laser-etched
This keyboard uses laser-etched legends, which are less durable than 86.3% of keyboards and equal to 10.9% of keyboards.
Show more

Keychron K3 Ultra Slim Wireless vs the average keyboard

246810TotalDesignConnectivity & PowerSwitchesMaterialsFeatures
  • 1.5 mm shorter key travel
    This keyboard has 2.5 mm of total travel, while the average keyboard has 4 mm.
    2.5 mm vs 4 mm
  • Adjustable actuation
    This keyboard supports adjustable actuation, the average keyboard does not. 21.9% of keyboards offer adjustable actuation.
  • 2 h shorter charging time
    This keyboard charges faster than the average keyboard (3 h vs 5 h). The average keyboard takes 5 h to charge.
    3 h vs 5 h
  • 0.5 mm shorter actuation distance
    This keyboard has a longer maximum actuation distance than the average keyboard (1.5 mm vs 2 mm). The average keyboard has a maximum actuation distance of 2 mm.
    1.5 mm vs 2 mm
  • 50.6% lower weight
    This keyboard weighs less than the average keyboard (483 g vs 978 g). The average keyboard weighs 978 g.
    483 g vs 978 g
  • 2.5 ° lower typing angle
    This keyboard has a lower typing angle than the average keyboard (2.5 ° vs 5 °). The average keyboard has a typing angle of 5 °.
    2.5 ° vs 5 °
  • 16.25 mm lower keyboard height
    This keyboard is lower than the average keyboard (22 mm vs 38.25 mm). The average keyboard height is 38.25 mm.
    22 mm vs 38.25 mm
  • 50.3 mm narrower width
    This keyboard is narrower than the average keyboard (306 mm vs 356.3 mm). The average keyboard width is 356.3 mm.
    306 mm vs 356.3 mm
  • 11.1% higher user score
    User score
    8.9/ 10
    ✕
    What it is
    A rating that combines user reviews and the total number of reviews received by the keyboard.
    When it matters
    When you want to understand how a keyboard performs in daily use or gaming and how reliable it is in terms of typing feel, noise level, comfort, and long-term durability.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Keychron K3 Ultra Slim Wireless
    the average keyboard
    Keychron K3 Ultra Slim Wireless has a higher user score than the average keyboard (8.89 vs 8).
    8.89 vs 8
  • 44.4% cheaper
    Keychron K3 Ultra Slim Wireless is cheaper than the average keyboard (£90 vs £130).
    £90 vs £130
  • 56.4% more popular
    Keychron K3 Ultra Slim Wireless is more popular than the average keyboard (9.62 vs 6.2).
    9.62 vs 6.15
  • 5.4% better value for money
    Keychron K3 Ultra Slim Wireless has better value for money than the average keyboard (8.26 vs 7.8).
    8.26 vs 7.84
  • 50.6% lower weight
    This keyboard weighs less than the average keyboard (483 g vs 978 g). The average keyboard weighs 978 g.
    483 g vs 978 g
  • 2.5 ° lower typing angle
    This keyboard has a lower typing angle than the average keyboard (2.5 ° vs 5 °). The average keyboard has a typing angle of 5 °.
    2.5 ° vs 5 °
  • 16.25 mm lower keyboard height
    This keyboard is lower than the average keyboard (22 mm vs 38.25 mm). The average keyboard height is 38.25 mm.
    22 mm vs 38.25 mm
  • 50.3 mm narrower width
    This keyboard is narrower than the average keyboard (306 mm vs 356.3 mm). The average keyboard width is 356.3 mm.
    306 mm vs 356.3 mm
  • 2 h shorter charging time
    This keyboard charges faster than the average keyboard (3 h vs 5 h). The average keyboard takes 5 h to charge.
    3 h vs 5 h
  • 1.5 mm shorter key travel
    This keyboard has 2.5 mm of total travel, while the average keyboard has 4 mm.
    2.5 mm vs 4 mm
  • Adjustable actuation
    This keyboard supports adjustable actuation, the average keyboard does not. 21.9% of keyboards offer adjustable actuation.
  • 0.5 mm shorter actuation distance
    This keyboard has a longer maximum actuation distance than the average keyboard (1.5 mm vs 2 mm). The average keyboard has a maximum actuation distance of 2 mm.
    1.5 mm vs 2 mm
  • 0.2 mm shorter actuation distance
    This keyboard has a shorter minimum actuation distance than the average keyboard (1.5 mm vs 1.7 mm). The average keyboard has a minimum actuation distance of 1.7 mm.
    1.5 mm vs 1.7 mm
  • 61.3% smaller battery capacity
    This keyboard has a smaller battery than the average keyboard (1,550 mAh vs 4,000 mAh). The average keyboard has a battery capacity of 4,000 mAh.
    1,550 mAh vs 4,000 mAh
  • Less versatile connectivity
    This keyboard offers less versatile connectivity than the average keyboard (USB / Bluetooth vs USB / 2.4GHz / Bluetooth). The average keyboard offers USB / 2.4GHz / Bluetooth connectivity.
    USB / Bluetooth vs USB / 2.4GHz / Bluetooth
  • Less durable legends
    This keyboard uses laser-etched legends, while the average keyboard uses double-shot.
    laser-etched vs double-shot
  • 3 fewer keys
    This keyboard has fewer keys than the average keyboard (84 vs 87). The average keyboard has 87 keys.
    84 vs 87
  • Older Bluetooth version
    This keyboard uses an older Bluetooth version than the average keyboard (5.1 vs 5.2). The average keyboard uses Bluetooth 5.2.
    5.1 vs 5.2
  • 3 older release date
    This keyboard is older than the average keyboard (2020 vs 2023). The average keyboard was released in 2023.
    November 2020
    2020 vs 2023
  • 3 fewer keys
    This keyboard has fewer keys than the average keyboard (84 vs 87). The average keyboard has 87 keys.
    84 vs 87
  • 3 older release date
    This keyboard is older than the average keyboard (2020 vs 2023). The average keyboard was released in 2023.
    November 2020
    2020 vs 2023
  • 61.3% smaller battery capacity
    This keyboard has a smaller battery than the average keyboard (1,550 mAh vs 4,000 mAh). The average keyboard has a battery capacity of 4,000 mAh.
    1,550 mAh vs 4,000 mAh
  • Less versatile connectivity
    This keyboard offers less versatile connectivity than the average keyboard (USB / Bluetooth vs USB / 2.4GHz / Bluetooth). The average keyboard offers USB / 2.4GHz / Bluetooth connectivity.
    USB / Bluetooth vs USB / 2.4GHz / Bluetooth
  • Older Bluetooth version
    This keyboard uses an older Bluetooth version than the average keyboard (5.1 vs 5.2). The average keyboard uses Bluetooth 5.2.
    5.1 vs 5.2
  • Less durable legends
    This keyboard uses laser-etched legends, while the average keyboard uses double-shot.
    laser-etched vs double-shot

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Expert reviews

In-depth analysis and verdict from leading tech publications

T
theverge.com
23/04/2021
Summary of the review
P
processir.medium.com
04/01/2021
Summary of the review
S
snikolaj.com
20/09/2024
Summary of the review
R
rtings.com
10/02/2022
Summary of the review
F
forbes.com
31/07/2021
Summary of the review
G
geekdad.com
05/06/2021
Summary of the review
T
tomshardware.com
03/03/2021
Summary of the review
R
rtings.com
07/01/2021
Summary of the review
P
pocketpc.ch
28/01/2023
Summary of the review
B
benedikt.io
10/12/2021
Summary of the review
T
tutonaut.de
05/02/2023
Summary of the review
L
lesnumeriques.com
08/09/2025
Summary of the review
C
capa9.net
20/12/2021
Summary of the review
S
smartworld.it
13/05/2021
Summary of the review
T
tweakers.net
10/12/2021
Summary of the review

Third-party reviews

Based on ratings from across the web.
Reviews last updated: June 2026 · How we calculate this

What customers like about Keychron K3 Ultra Slim Wireless

  • Ultra-slim and lightweight 75% layout, making it highly portable and space-efficient
  • Versatile connectivity with support for both wired (USB-C) and wireless (Bluetooth 5.1) modes, pairing with up to three devices
  • Full compatibility with both macOS and Windows, including dedicated system-specific keycaps and toggle switches
  • Hot-swappable optical switch option allows for easy customization and switch replacement without soldering
  • Satisfying typing experience with low-profile mechanical or optical switches that offer good tactile feedback
  • Aesthetic design featuring customizable RGB or white backlighting with multiple lighting patterns

What customers don't like about Keychron K3 Ultra Slim Wireless

  • Short battery life due to a relatively small 1550mAh battery, often requiring frequent charging every 1-2 days with backlighting on
  • Lack of official companion software for key remapping or macro programming (native to original and V2 models)
  • ABS keycaps are prone to developing a shiny, oily texture over time and may show fingerprints easily
  • Bluetooth connectivity can occasionally experience lag, interference, or delay when waking from sleep mode
  • Limited third-party keycap compatibility due to Keychron's unique low-profile stabilizers
  • The ultra-sensitive switches and close key spacing can lead to frequent accidental key presses or a steep learning curve for those used to standard keyboards

Verdict

The Keychron K3 Ultra-Slim Wireless is a 75% layout (84-key) mechanical keyboard featuring a 22mm low-profile design and a reinforced aluminum body that is 40% thinner than conventional models. It offers versatile connectivity via Bluetooth 5.1 for up to three devices or a wired USB-C mode, with full compatibility for macOS, Windows, and Android. Key performance highlights include hot-swappable low-profile Gateron mechanical or optical switches that provide a short travel distance for faster actuation, alongside adjustable feet for 6 or 9-degree typing angles. Main pros are its extreme portability, satisfying tactile feedback for its size, and dedicated Mac multimedia keys; however, notable cons include a relatively short battery life (rated at 34 hours with backlighting on from a 1550 mAh battery) and lack of dedicated software for remapping keys or programming macros.

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