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Resize a photo to 20×30 in (6000×9000 pixels)
A 20×30 in print at 300 DPI is 6000×9000 pixels. Set 20×30 in and 300 DPI in the panel and choose crop to fill: a 4:3 phone photo loses 50% and gives only 101 pixels per inch, so it is enlarged 2.98×. As a JPEG, a detailed outdoor photo comes to about 12.5 MB at the panel's default quality 85 and 9.48 MB at quality 75 (extrapolated). At 54 megapixels this is above the 16.7-megapixel canvas limit of iPhone and iPad browsers, so PixelFit cannot make a file this large there: make it on a computer.
20×30 in at 300 DPI (6000×9000 px)
JPG · no file-size limit · 20x30 in at 300 DPI · white background
No file-size limit is set: PixelFit saves at high quality and changes only the format and any pixel size you set. 20x30 in at 300 DPI is 6000x9000 pixels.
Fit, background and padding crop to fill · white background
Saving presets is part of Pro.
The result appears here: the exact byte count, pixel size and quality, the size before and after, a preview and a download button.
The batch kit (one ZIP for up to 500 photos, several photos merged into one PDF) is part of Pro.
20×30 in at a glance
| Physical size | 20×30 in = 508×762 mm |
|---|---|
| Pixels at 300 DPI | 6000×9000 px (54,000,000 pixels, 54 MP) |
| Shape | 2:3, portrait (width ÷ height = 0.6667) |
| From a 12 MP phone photo | 101 pixels per inch after the crop to fill (50% cut) |
| At 600 DPI | 12000×18000 px (216 MP) |
| Estimated JPEG (outdoor photo, quality 75, 300 DPI) | 9.48 MB (extrapolated) |
| JPEG without a KB limit (panel default, quality 85) | 12.5 MB (extrapolated) |
| On iPhone and iPad | Above the 16.7 MP canvas limit of their browsers: make this size on a computer |
How 20×30 in turns into pixels
An inch is exactly 25.4 mm, so at 300 DPI the pixel size is 20 in × 300 = 6000 px wide and 30 in × 300 = 9000 px tall. 20×30 in is a portrait shape with sides in the ratio 2:3 (0.6667 as a decimal), 508×762 mm in the other unit.
The same 20×30 in needs 4000×6000 px at 200 DPI and 12000×18000 px (216 MP) at 600 DPI. PixelFit writes the DPI you set into the JPEG header (the JFIF density field), so print software that reads it knows the file is meant to come out at 20×30 in.
Is your photo sharp enough for 20×30 in?
After the crop to fill, this is how many source pixels land on each inch of 20×30 in. Above 300 DPI the picture is reduced to 300 DPI; below it, PixelFit has to enlarge the crop and fine detail softens.
| Starting image | Crop to fill keeps | Area lost | Pixels per inch at 20×30 in | To reach 300 DPI |
|---|---|---|---|---|
| 12 MP phone photo (4032×3024, 4:3) | 2016×3024 (left and right cut) | 50% | 101 DPI | enlarged (2.98×) |
| 24 MP camera photo (6000×4000, 3:2) | 2667×4000 (left and right cut) | 55.6% | 133 DPI | enlarged (2.25×) |
| Full HD screenshot (1920×1080, 16:9) | 720×1080 (left and right cut) | 62.5% | 36 DPI | enlarged (8.33×) |
| Vertical phone video frame (1080×1920, 9:16) | 1080×1620 (top and bottom cut) | 15.6% | 54 DPI | enlarged (5.56×) |
20×30 in in pixels at each print resolution
Pixels = inches × DPI. The panel uses 300 DPI unless you change it; the file sizes are for a detailed outdoor photo saved as JPEG.
| Resolution | Pixels | Megapixels | JPEG q75 | JPEG q90 |
|---|---|---|---|---|
| 150 DPI | 3000×4500 | 13.5 MP | ≈ 2.78 MB | ≈ 4.55 MB |
| 200 DPI | 4000×6000 | 24 MP | ≈ 4.62 MB | ≈ 7.65 MB |
| 300 DPI | 6000×9000 | 54 MP | ≈ 9.48 MB | ≈ 15.9 MB |
| 400 DPI | 8000×12000 | 96 MP | ≈ 15.8 MB | ≈ 26.7 MB |
| 600 DPI | 12000×18000 | 216 MP | ≈ 32.3 MB | ≈ 55.6 MB |
How large is a 20×30 in file?
Saved at 300 DPI (6000×9000 px), a detailed outdoor photo of 20×30 in comes to about 7.29 MB at JPEG quality 60, 9.48 MB at 75 and 15.9 MB at 90, and about 7.26 MB as WebP at 75. Dropping to 200 DPI (4000×6000 px) brings quality 75 down to about 4.62 MB, but the print then holds fewer pixels per inch.
At 300 DPI the photo does not fit under 200 KB, 500 KB, 1 MB and 2 MB even at quality 30. Set the KB limit next to the size and PixelFit picks the highest quality that fits.
Other 2:3 print and photo sizes
These sizes have the same 2:3 shape as 20×30 in, so a photo cropped for one fits the others with no further crop.
| Size | Pixels | Scale from 20×30 in |
|---|---|---|
| 12×18 inch print | 3600×5400 | 0.6× |
| 8×12 inch print | 2400×3600 | 0.4× |
| 4×6 inch print | 1200×1800 | 0.2× |
| 2×3 inch print | 600×900 | 0.1× |
| 1000×1500 portrait | 1000×1500 | 0.17× |
| 800×1200 portrait | 800×1200 | 0.13× |
| 400×600 portrait | 400×600 | 0.07× |
How to resize a picture to 20×30 in
-
Add the picture
Drop, paste or pick the photo in the PixelFit panel at the top of this page; it is decoded in your browser and never uploaded.
-
Set the size
Pick inch as the unit, enter 20×30 in and 300 DPI; the tool turns that into 6000×9000 pixels.
-
Choose how it fits
Choose crop to fill to keep the 2:3 frame without stretching (a phone photo loses 50%, left and right cut). Fit inside keeps the whole picture as a 6000×4500 file instead; Pad with colour puts that on a full 6000×9000 canvas.
-
Pick the format and download
Keep JPG (without a KB limit PixelFit saves at quality 85, about 12.5 MB for a detailed outdoor photo) so the 300 DPI stamp travels with the file, or choose PDF to get the picture as a PDF page, then download.
Sources
- Inch (1 inch is exactly 25.4 mm), Wikipedia, checked 31 October 2026: en.wikipedia.org/wiki/Inch
- Measured by PixelFit with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026, from the sample photo Hartz Lake at Hartz Mountain.jpg by JustinH (Wikimedia Commons user) (CC0 1.0): commons.wikimedia.org/wiki/File:Hartz_Lake_at_Hartz_Mount…
Frequently asked questions
How do I resize a photo to 20×30 in?
Open the photo in the PixelFit panel on this page, set 20×30 in at 300 DPI (6000 × 9000 px), choose crop to fill and download. From a 12 MP phone photo that crops 50% (left and right cut) and leaves 101 pixels per inch, so the crop is enlarged 2.98×.
How many pixels is 20×30 in?
20×30 in is 6000×9000 px at 300 DPI, 12000×18000 px at 600 DPI and 3000×4500 px at 150 DPI (pixels = inches × DPI).
What DPI should a 20×30 in photo have?
PixelFit uses 300 DPI, which makes 20×30 in exactly 6000×9000 px; print it at 100% scale. At 150 DPI the same 6000×9000 pixels would print 40×60 in, twice as large and with half the density.
How big is a 20×30 in JPEG at 300 DPI?
For a detailed outdoor photo about 9.48 MB at quality 75 (7.29 MB at 60, 15.9 MB at 90, 12.5 MB at the panel's default quality 85); a head-and-shoulders portrait is about 3.67 MB at quality 75, extrapolated from encodes of real sample photos measured up to 6.75 MP (6000×9000 px lies outside that range).
Related
Same 2:3 ratio
Nearby sizes
- 16×20 inch print 4:5
- A3 (297×420 mm) 3508:4961 (1:1.41)
- 11×14 inch print 11:14
- US Legal (8.5×14 in) 17:28
- A4 (210×297 mm) 620:877 (1:1.41)
- 4000×4000 square 1:1