Resize Image to 3840×2160

3840×2160 is 4K Ultra HD — exactly twice Full HD in each direction. Use it for 4K TV and monitor wallpapers, video frames and title cards. Everything runs in your browser — nothing is uploaded. Need a smaller file instead? Compress or convert.

or drop images here — or press Ctrl + V to paste

JPG · PNG · WebP · GIF · BMP — no size limit, no sign-up

Width (px)

Height (px)

Unit

DPI

Keep aspect ratio (set one, the other follows)

Scale 50%

Aspect ratio

Width in pixels (optional)

Fit whole image inside instead of cropping to fill (result may be smaller than the preset)

Output format

Output quality 90

Position & zoom

Zoom 100%

Drag the preview to choose which part of the image is kept. The same framing is used for every image in the batch.

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resized

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new size

Added 0 files

Why choose 3840×2160?

At 3840×2160 pixels, an image holds 8.29 megapixels in a widescreen 16:9. It is a common choice for 4K UHD screens and wallpapers.

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16:9 landscape shape

Every 3840×2160 image has a widescreen 16:9 ratio, so anything you design for it keeps the same proportions on every screen.

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The exact size needed

3840×2160 is the exact size for 4K UHD screens and wallpapers, so your image is shown as-is instead of being re-scaled or cropped by the platform.

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Prints 12.8×7.2 in at 300 DPI

That is 32.5×18.3 cm at photo quality, or 25.6×14.4 in at 150 DPI for posters viewed from a distance.

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About 1.3 MB–2.5 MB as JPG

A typical photo at 3840×2160 saves to roughly 1.3 MB–2.5 MB at good JPG quality; WebP is usually 25–35% smaller.

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Sharp results

A 12 MP phone photo has 1.5× more pixels than 3840×2160, so resizing down keeps it sharp.

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Framing control

Filling 3840×2160 from a 4:3 phone photo trims about 25% of it. Drag the preview to choose what stays, or tick “Keep aspect ratio” to keep it all.

3840×2160 at a glance

Pixels	3840×2160 (8,294,400 pixels)
Aspect ratio	widescreen 16:9
Megapixels	8.29 MP
Orientation	Landscape
Print size at 300 DPI	12.8×7.2 in (32.5×18.3 cm)
Print size at 150 DPI	25.6×14.4 in
Typical JPG file	1.3 MB–2.5 MB
Typical WebP file	910 KB–1.8 MB
Common uses	4K UHD screens and wallpapers
Similar sizes	2560×1440, 3000×1500, 2048×1152, 1920×1080

Resize an image to 3840×2160 in 3 steps

Add your photo (or several) — drag them onto the box above.
The size is already set to 3840×2160. Drag the preview to frame it, or tick “Keep aspect ratio” to avoid cropping.
Click Resize and download, or save everything as one ZIP.

New to image resizing? Read the full resizing guide.

Square sizes

Same width and height — profile photos, icons, product shots:

8 × 8 10 × 10 16 × 16 28 × 28 32 × 32 40 × 40 50 × 50 64 × 64 96 × 96 98 × 98 100 × 100 112 × 112 120 × 120 128 × 128 144 × 144 150 × 150 180 × 180 184 × 184 192 × 192 200 × 200 240 × 240 250 × 250 256 × 256 300 × 300 320 × 320 350 × 350 360 × 360 400 × 400 450 × 450 480 × 480 500 × 500 512 × 512 600 × 600 640 × 640 700 × 700 800 × 800 840 × 840 900 × 900 1000 × 1000 1024 × 1024 1080 × 1080 1100 × 1100 1200 × 1200 1300 × 1300 1400 × 1400 1500 × 1500 1600 × 1600 1920 × 1920 2000 × 2000 2048 × 2048 2400 × 2400 2500 × 2500 3000 × 3000 4000 × 4000 5000 × 5000 6000 × 6000

Landscape sizes

Wider than tall — screens, banners, covers and thumbnails:

64 × 32 140 × 110 150 × 100 200 × 150 300 × 80 300 × 250 320 × 240 400 × 150 480 × 360 512 × 128 512 × 256 555 × 425 600 × 240 600 × 400 (3:2) 640 × 360 640 × 480 (4:3) 680 × 240 800 × 600 (4:3) 851 × 315 900 × 600 1000 × 500 1024 × 576 (16:9) 1080 × 566 1128 × 191 1200 × 628 1200 × 630 1200 × 675 (16:9) 1200 × 800 1200 × 900 1280 × 700 1280 × 720 (HD) 1366 × 768 1500 × 500 1500 × 1000 (3:2) 1600 × 900 1920 × 1080 (Full HD) 1920 × 1200 (16:10) 2048 × 1152 (2K) 2560 × 1440 (1440p) 2660 × 1140 (banner) 3000 × 1500 3440 × 1440 3840 × 2160 4080 × 3060

Portrait sizes

Taller than wide — passport photos, forms and phone screens:

Change the aspect ratio

Fit an image to a ratio without choosing pixels:

Any aspect ratio 16:9 4:3 3:2 1:1 4:5 5:4 3:4 2:3 9:16 21:9 5:2

Paper, print & photo sizes

Paper and photo sizes in mm, cm and inches, plus DPI tools:

A5 A4 A3 Letter Legal 4R (4 × 6 in) Postcard Stamp size Signature 2.5 × 2.5 cm 3 × 4 cm 3.3 × 4.8 cm 3.5 × 2.5 cm 3.5 × 3.5 cm 3.5 × 4.5 cm 3.5 × 5 cm 3.81 × 3.81 cm 4 × 3 cm 4 × 4 cm 4 × 5 cm 4 × 6 cm 4.5 × 3.5 cm 5 × 5 cm 5 × 7 cm 5.08 × 5.08 cm 25 × 25 mm 30 × 40 mm 32 × 26 mm 33 × 48 mm 35 × 35 mm 35 × 45 mm 35 × 50 mm 35 × 54 mm 36 × 36 mm 38.1 × 38.1 mm 40 × 50 mm 45 × 35 mm 45 × 38 mm 47 × 36 mm 50 × 50 mm 50 × 70 mm 50.8 × 50.8 mm 51 × 51 mm 52 × 40 mm 1.18 × 1.57 in 1.30 × 1.89 in 1.38 × 1.38 in 1.38 × 1.77 in 1.5 × 1.5 in 1.97 × 2.76 in 2 × 2 in 3 × 3 in 4 × 6 in 5 × 7 in 6 × 4 in 8 × 10 in 8.5 × 11 in Resize in pixels Resize in cm Resize in mm Resize in inches Resize by percentage 72 DPI converter 100 DPI converter 150 DPI converter 200 DPI converter 300 DPI converter 600 DPI converter

Resize for a platform

Ready-made sizes for social profiles and posts:

Resize tools

Batch resizing, DPI and crop tools:

Bulk image resizer Resize for printing Image DPI converter Image DPI checker Circle crop Square crop

Getting a clean 4K image

8.3 million pixels. 4K has four times the pixels of 1920×1080. To look sharp, start from a photo at least this large — most phone cameras (12 MP and up) are big enough in width, then trimmed to 16:9.

Don't upscale a small image. Stretching a 1080p file to 4K adds no detail; it just makes a bigger blurry file. If your source is smaller than 3840 wide, a Full HD wallpaper will look better.

File size. A 4K photo as JPG is usually 1.5–4 MB. For sharing online, compress it with 2.5 MB or 1 MB.

Other large sizes: 2560×1440 (QHD), 4080×3060 (phone camera).

Sizes similar to 3840×2160

Close in shape and size — each one opens the tool already set to it:

2048 × 1152 3000 × 1500 1600 × 900 1920 × 1200 1366 × 768 1280 × 720 3440 × 1440 1200 × 675

Frequently asked questions

Is 3840×2160 the same as 4K?

It is 4K UHD, the version used by TVs, monitors and YouTube. Cinema 4K (DCI) is slightly wider at 4096×2160.

What aspect ratio is 3840×2160?

3840×2160 has a widescreen 16:9 aspect ratio. Any size with the same ratio — for example 2560×1440, 3000×1500 — can be scaled to it without cropping.

How big will a 3840×2160 image print?

At 300 DPI (photo quality) 3840×2160 prints at 12.8×7.2 inches (32.5×18.3 cm). At 150 DPI it covers 25.6×14.4 inches, fine for posters seen from further away.

How large is a 3840×2160 file?

A photo at 3840×2160 is usually 1.3 MB–2.5 MB as a JPG, and about 910 KB–1.8 MB as WebP. If you need it smaller, run it through the compressor afterwards.

Will my photo lose quality at 3840×2160?

No — a normal phone photo is much larger, so it is scaled down and stays sharp.

Can I resize to 3840×2160 without cropping?

Yes. Tick “Keep aspect ratio”: the whole picture is kept, but one side may come out shorter than 3840×2160. Without it, the image fills 3840×2160 exactly and the edges that do not fit the 16:9 shape are trimmed.

Are my images uploaded?

No. Resizing happens entirely in your browser. Nothing is transmitted or stored, and you can disconnect from the internet after the page loads and it still works.