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  1. Table of Contents
  2. Top
  3. Main Differences
  4. Design
    1. Dimensions
    2. Build Quality
    3. Ergonomics
    4. Hardware Customizability
    5. Backlight Features
    6. Backlight Clarity
    7. Cable & Connector
    8. Wireless Versatility
    9. Macro Keys And Programming
    10. Extra Features
    11. In The Box
  5. Typing Experience
    1. Switches
    2. Keystrokes
    3. Typing Quality
    4. Typing Noise
    5. Latency
  6. Software and Operating System
    1. Configuration Software
    2. Computer Compatibility
    3. Wireless Mobile Compatibility
  7. Comments

Logitech K840 vs Logitech K845

Side-by-Side Comparison

Products

Logitech K840
Logitech K845

Tested using Methodology v1.0

Updated Dec 16, 2022 10:11 PM

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Tested using Methodology v1.2

Updated Jun 21, 2023 02:44 PM

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Logitech K840 Picture
Logitech K845 Picture

Variants

  • K840 (Black/Gray)
  • Logitech K845 (Black/Gray)

Our Verdict

Logitech K840

Logitech K845

The Logitech K840 and the Logitech K845 are both decent office keyboards. The K845 feels better built, its Cherry MX Blue switches require a bit more force to actuate, and it has backlighting. However, our K840 unit is fully compatible with macOS, and while it has customization software, there aren't many options.

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Notice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our keyboards test methodology.

Main Differences for

Threshold 

0.10

Gaming 

6.9
7.9

Backlighting 
 

0.0
6.5

Latency 
 

10
6.8

Pre-Travel 
 

1.6 mm
2.2 mm

Software & Programming 
 

3.8
0.0

Build Quality 
 

7.0
8.0

Keyboard Compatibility 
 

7.8
10

Full Comparison

Design

Dimensions 
 

Top Picture  

Logitech K840 Top Picture
Logitech K845 Top Picture

Size 
 

Full-size (100%)
Full-size (100%)

Height 
 

1.3" (3.4 cm)
1.4" (3.6 cm)

Width  

17.5" (44.5 cm)
17.1" (43.5 cm)

Depth 
 

5.2" (13.2 cm)
5.0" (12.7 cm)

Depth With Wrist Rest 
 

N/A
N/A

Weight 
 

2.01 lbs (0.910 kg)
1.75 lbs (0.794 kg)

Show text

Build Quality 
 

7.0
8.0

Build Quality Close Up  

Logitech K840 Build Quality Close Up
Logitech K845 Build Quality Close Up

Keycap Material  

ABS
ABS

Show text

Ergonomics 
 

6.5
6.0

Side Picture  

Logitech K840 Side Picture
Logitech K845 Side Picture

Curved/Angled 
 

Straight
No

Split Keyboard 
 

No

Key Alignment 
 

Staggered

Minimum Incline 
 

Medium Incline 
 

N/A
N/A

Maximum Incline 
 

Home Row Height 
 

28.5 mm (1.1")

Wrist Rest  

No

Show text

Hardware Customizability 
 

6.0

Customizability Overview  

Logitech K845 Customizability Overview

Replaceable Cherry Stabilizers 
 

Yes

Stabilizer Fixation 
 

Plate-Mounted

Spacebar Stabilizer Size 
 

6.25u

Size Of Right Mod Keys 
 

1.25u

Hot-Swappable Switches 
 

No

Switch Stem Shape 
 

Cherry MX Style

Switch PCB Socket 
 

Soldered

North-Facing Cherry MX Interference 
 

Yes

Backlight Features 
 

0.0
6.5

Backlighting Picture  

Logitech K840 Backlighting Picture
Logitech K845 Backlighting Picture

Brightness Max  

Logitech K840 Brightness Max
Logitech K845 Brightness Max

Backlighting  

No
Yes

Brightness Min  

Logitech K840 Brightness Min
Logitech K845 Brightness Min

White Shot 
 

Logitech K840 White Shot
Logitech K845 White Shot

RGB 
 

No

Per-Key Backlighting 
 

No
Yes

Effects 
 

No
Yes

Software Controllable 
 

No
No

Color 
 

No Backlighting

Color Mixing 
 

No Backlighting

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Backlight Clarity 
 

9.0

White Shot  

Logitech K840 White Shot
Logitech K845 White Shot

Show text

Cable & Connector  

Connectivity  

Wired
Wired

Detachable 
 

No
No

Length  

5.9 ft (1.8 m)
5.9 ft (1.8 m)

Connector (Keyboard side) 
 

Not Detachable
Not Detachable

Show text

Wireless Versatility 
 

0.0
0.0

Bluetooth 
 

No
No

Bluetooth Multi-Device Pairing 
 

No
No

Proprietary Receiver 
 

No
No

Battery Type 
 

No Batteries
No Batteries

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Macro Keys And Programming 
 

0.0

Dedicated Macro Keys Count  

0

Onboard Macro Programming 
 

No

Macro Programming With Software 
 

No

Extra Features 
 

Extra Features  

Logitech K840 Extra Features
Logitech K845 Extra Features

Media Keys 
 

Hot Keys
Non-Dedicated

Trackpad / Trackball  

No
No

Scroll Wheel 
 

No
No

Control Knob 
 

No

USB Passthrough 
 

No
No

Numpad  

Yes
Yes

Windows Key Lock 
 

Yes
Yes

Lock Indicator  

Caps Lock
Caps, Scroll & Num lock

Macro Programmable Keys 
 

No

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In The Box  

Bundle Picture  

Logitech K840 Bundle Picture
Logitech K845 Bundle Picture

Show text

Typing Experience

Switches 
 

Wobble Video  

Switch Name 
 

Romer-G Tactile
Cherry MX Blue

Switch Type 
 

Mechanical

Feel 
 

Tactile
Clicky

Keystrokes 
 

Key Switch Actuation Graph  

See details on graph tool
See details on graph tool

Key Switches 
 

Romer-G Tactile
Cherry MX Blue

Mechanical 
 

Yes

Feel 
 

Tactile
Clicky

Operating Force 
 

49 gf
54 gf

Actuation Force 
 

44 gf
45 gf

Pre-Travel 
 

1.6 mm
2.2 mm

Total Travel 
 

3.4 mm
4.0 mm

Show text

Typing Quality 
 

7.5
8.0

Show text

Typing Noise 
 

9.0
4.1

Typing Sample  

Average Loudness 
 

56.8 dBA

High Pitch Clicks 
 

Yes

Noise 
 

Quiet

Show text

Latency 
 

10
6.8

Latency Video  

Latency Wired 
 

2.1 ms
18.9 ms

Latency Receiver 
 

N/A
N/A

Latency Bluetooth 
 

N/A
N/A

Show text

Software and Operating System

Configuration Software 
 

Software Picture  

Logitech K840 Software Picture

Software Tour  

Software Name  

Logitech Options
No Software

Software Windows Compatible 
 

Yes
No

Software macOS Compatible 
 

Yes
No

Onboard Memory 
 

No
No

Profiles 
 

No Profile
No Profile

Account Required 
 

No

Cloud Sync 
 

Yes

Macro Programming 
 

No

Ease Of Use 
 

Easy

Show text

Computer Compatibility 
 

7.8
10

Windows 
 

Full
Fully Compatible

macOS 
 

Full
Fully Compatible

Linux (Ubuntu 22) 
 

Partial
Fully Compatible

Media Key Compatibility 
 

Windows, MacOS & Linux

Android  

No
Not Compatible

iOS  

No
Not Compatible

iPadOS  

No
Not Compatible

Show text

Wireless Mobile Compatibility 
 

0.0

Android 
 

No
Not Compatible

iOS 
 

No
Not Compatible

iPadOS 
 

No
Not Compatible

Media Key Compatibility 
 

Not Compatible

Logitech K840

Logitech K845

Comments

  1. Comparison

Logitech K840 vs Logitech K845: Main Discussion

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