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20x30 Poster Size in Pixels at 300 DPI
A 20×30 poster at 300 DPI is 6000×9000 pixels. It is 2:3, like 16×24 and 12×18. Most phone photos cannot fill it sharply — check the original first.
Direct answer
A 20×30 inch poster at 300 DPI is 6000×9000 pixels in portrait, or 9000×6000 in landscape. The ratio is 2:3. You need a source that still has 6000 pixels on the short side after crop. If you only have a 12×18 file (3600×5400), printing it at 20×30 is 180 DPI — expect softness.
20×30 is the size shops add to look premium. It is also the size that generates “blurry poster” tickets because the listing file was an 8×10. Viewing distance helps a little. It does not invent brushstrokes.
Offer 20×30 only when the scan or RAW can feed it. Otherwise 16×24 or 12×18 in the same 2:3 family is the honest SKU.
- 1
Crop to 2:3 around the subject
Same family as 12×18 and 16×24.
- 2
Read the short side in pixels
You want 6000 or more.
- 3
If short, list a smaller 2:3
16×24 or 12×18.
- 4
Export 6000×9000 at 300 DPI
Only from a large original.
Pixel table for 2:3 posters
12×18 = 3600×5400. 16×24 = 4800×7200. 20×30 = 6000×9000. 24×36 = 7200×10800. Climb the ladder only as far as the original reaches.
| Size | Portrait pixels | Minimum short side |
|---|---|---|
| 12 × 18 in | 3600 × 5400 | 3600 px |
| 16 × 24 in | 4800 × 7200 | 4800 px |
| 20 × 30 in | 6000 × 9000 | 6000 px |
| 24 × 36 in | 7200 × 10800 | 7200 px |
When 150 DPI is a conscious choice
Some wall murals and fabrics specify 150 DPI. 20×30 at 150 DPI is 3000×4500. That can look acceptable from six feet on canvas. It will not look acceptable as a handheld 8×10. Do not reuse the 150 DPI 20×30 file for paper gift sizes.
72 vs 300 DPI is the longer explanation of headers versus pixels.
Export 20×30
Open Studio, add 20 × 30 in only if the crop preview is not interpolating mush. Reopic will still export the pixel box you asked for — you must supply enough source pixels. Pro is $33 lifetime for ZIP folders across a drop.
Mockups that lie
A 2000-pixel mockup of a 20×30 on a wall looks sharp on a phone. The production file is a different asset. Keep mockups in a marketing folder. Keep 6000×9000 in the press folder. Etsy print file requirements splits those jobs.
FAQ: 20x30 poster size pixels 300 DPI
How many pixels is 20x30 at 300 DPI?+
6000×9000 pixels in portrait.
Is 20x30 the same as 16x20?+
No. 20×30 is 2:3. 16×20 is 4:5.
Can I print 20x30 from a 12x18 file?+
That is 180 DPI. Expect softness. Use a larger original or sell 12×18.
Is 20x30 the same as 50x70 cm?+
Close but not equal. 50×70 cm is about 19.7×27.6 in. Export the centimetres you list.
