Rank #7 in Best 4K Monitor 2026: Nine Ranked, and Two Listings That Contradict Themselves
LG UltraFine 27US550-B 27in 4K IPS Monitor
- Rating
- 4.5
- Ratings
- 71
- Rank
- #7
Price and rating as shown on Amazon when we collected them. Both change.
The LG UltraFine 27US550-B is a 27-inch 4K IPS monitor listed at £205.99, and it takes seventh place in this guide. That price sits above the £161.46 listing at the bottom of the guide and below the £248.99 Philips Evnia. Its headline numbers are also the least excitable here: 60Hz and 5 ms, in a category where the surrounding boxes shout 160Hz.
Its own listing disagrees with itself in two places. The colour-gamut bullet promises DCI-P3 90% (Typ.) and the Colour Gamut Value row agrees at 90.0, but the Picture Quality Enhancement Technology row on the same page says DCI-P3 98% (Typ.). The port rows split too: Total HDMI Port counts 1, Total Video Out Ports counts 2. The rating breakdown adds a third awkward number — 77 in the five-star column against a stated 71 ratings, which only works if the bars are percentages. Everything below comes from the Amazon listing as it stands, not from a monitor we tested ourselves.
How those 71 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £205.99 |
|---|---|
| Rating | 4.5 out of 5 from 71 ratings, with 77 in the five-star column of the breakdown (as listed) |
| Resolution | 3840 x 2160 (4K Ultra HD) |
| Refresh Rate | 60 Hz |
| Response Time | 5 ms |
| Colour Gamut | DCI-P3 90% in the bullet, 98% (Typ.) in the picture-quality row, 90.0 in the gamut row (as listed) |
| Contrast Ratio | 1000:1 |
| HDMI Ports | 1 in the HDMI row, 2 in the video-out row (as listed) |
What it is up against
The rivals it was ranked against in Best 4K Monitor 2026: Nine Ranked, and Two Listings That Contradict Themselves.
Questions people ask
What is the LG UltraFine 27US550-B?
It is a 27-inch IPS monitor at 3840 x 2160, described as 4K Ultra HD, listed at £205.99.
What refresh rate and response time does it have?
The LG UltraFine 27US550-B is listed at 60 Hz with a 5 ms response time, repeated in both the spec table and the Advanced Display Technology bullet.
How many HDMI ports does the 27US550-B have?
The listing gives two different answers: the Total HDMI Port row says 1 and the Total Video Out Ports row says 2.
What colour coverage should I expect?
The LG UltraFine 27US550-B bullet says DCI-P3 90% (Typ.) and its Colour Gamut Value row says 90.0, while the Picture Quality Enhancement Technology row says DCI-P3 98% (Typ.).
Is the stand adjustable?
Yes — the LG UltraFine 27US550-B listing describes tilt, height, swivel and pivot adjustment.
How is the LG UltraFine 27US550-B rated?
It sits at 4.5 out of 5 from 71 ratings, with 77 shown in the five-star column of the breakdown as listed.
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