About 3840 by 2160 pixels, which is four times the pixels of Full HD and much sharper on large screens.
Video Glossary
4K
4K is a video resolution of roughly 3840 by 2160 pixels, offering four times the detail of Full HD.
What is 4K?
4K is a high video resolution of about 3840 by 2160 pixels. That is four times the pixels of Full HD, which means much finer detail and sharpness, especially on large screens.
When 4K is worth it
4K shines for cinematic content, product close-ups, and anything shown on big displays. It also gives editors room to crop or reframe while keeping quality. The trade-off is much larger files that need more storage and faster connections to stream.
4K vs. Full HD
For most online video and webinars, Full HD at 1920 by 1080 is still the practical standard. It looks sharp, streams reliably, and keeps file sizes reasonable. 4K helps only when your camera, your audience's screens, and your bandwidth can all support it.
Balancing quality and delivery
Higher resolution is not always better. The right choice depends on where the video will be watched and how it will be delivered, since compression and connection speed affect what viewers actually see.
Frequently Asked Questions
What resolution is 4K?
Is 4K always better than 1080p?
Not always. 4K only helps if your camera, your viewers' screens, and their bandwidth can all support it. For most online video, Full HD is the practical standard.
Does 4K use more storage and bandwidth?
Yes, considerably. 4K files are much larger, so they need more storage and faster connections to stream smoothly.
Do I need 4K for webinars?
Usually not. Full HD looks crisp and streams reliably, which is why it remains the standard for webinars and most business video.
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