How to use the 3840x2160 Aspect Ratio
Start from this size
Width and height are already filled in for this frame.
Change width or height
Change the width or the height. The other numbers update as you type.
Read the size and copy
The line under the form shows 16:9 beside the pixel size.
| Scale | Size | MP | |
|---|---|---|---|
| 25% | 960×540 | 0.5184 | |
| 50% | 1920×1080 | 2.0736 | |
| 75% | 2880×1620 | 4.6656 | |
| 100% | 3840×2160 | 8.2944 | |
| 150% | 5760×3240 | 18.6624 | |
| 200% | 7680×4320 | 33.1776 |
What is the 3840x2160 aspect ratio?
3840×2160 simplifies to 16:9. The decimal is 1.7778:1 and the pixel count is 8.2944 megapixels. Orientation is landscape.
16:9 is a named standard on this site.
Ultra HD (4K UHD) is listed for uhdtv, streaming, monitors. The source below is the document that names this frame.
How it differs from nearby sizes
Half scale is 1920×1080 (2.0736 MP). Double scale is 7680×4320 (33.1776 MP). Both keep 16:9.
For contrast, 1920×1080 (Full HD (1080p)) is a different shape or density.
Print size at 300 DPI is 12.8 × 7.2 inches. Inches are pixels divided by DPI.
Typical uses
Ultra HD (4K UHD) shows up in uhdtv, streaming, monitors. 3840×2160 stays 16:9 when both sides scale. Phone models are omitted unless a manufacturer page states the pixels.
Open the calculator on this size to read 16:9, or to set one side and get the other in pixels.
Frequently asked questions
Is 3840x2160 equal to 16:9?
Yes, after the greatest common divisor. The two sides divide by 240.
How many megapixels is it?
8.2944 MP.
What is a smaller 16:9 size?
1920×1080 is half on each side.
Can I print it?
Inches = pixels ÷ DPI. At 300 DPI that is 12.8 × 7.2 in.