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Resize a photo to 33×48 mm (390×567 pixels)
A 33×48 mm print at 300 DPI is 390×567 pixels. Set 33×48 mm and 300 DPI in the panel and choose crop to fill: a 4:3 phone photo loses 48.4% and still gives 1,600 pixels per inch. As a JPEG, a head-and-shoulders portrait comes to about 41.5 KB at the panel's default quality 85 and 31.4 KB at quality 75.
33×48 mm at 300 DPI (390×567 px)
JPG · no file-size limit · 33x48 mm 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. 33x48 mm at 300 DPI is 390x567 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.
33×48 mm at a glance
| Physical size | 33×48 mm = 1.3×1.89 in |
|---|---|
| Pixels at 300 DPI | 390×567 px (221,130 pixels, 0.22 MP) |
| Shape | 11:16, portrait (width ÷ height = 0.6875) |
| From a 12 MP phone photo | 1,600 pixels per inch after the crop to fill (48.4% cut) |
| Copies per sheet | 9 on 4×6 in · 36 on A4 · 32 on US Letter |
| At 600 DPI | 780×1134 px (0.88 MP) |
| Resampling passes from a phone photo | 2080×3024 crop → 1040×1512 → 520×756 → 390×567 |
| Estimated JPEG (portrait photo, quality 75, 300 DPI) | 31.4 KB |
| JPEG without a KB limit (panel default, quality 85) | 41.5 KB |
How 33×48 mm turns into pixels
An inch is exactly 25.4 mm, so at 300 DPI the pixel size is 33 mm ÷ 25.4 × 300 = 389.764, rounded to 390 px wide, and 48 mm ÷ 25.4 × 300 = 566.929, rounded to 567 px tall. 33×48 mm is a portrait shape with sides in the ratio 11:16 (0.6875 as a decimal), 1.3×1.89 in in the other unit.
The same 33×48 mm needs 260×378 px at 200 DPI and 780×1134 px (0.88 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 33×48 mm.
Is your photo sharp enough for 33×48 mm?
After the crop to fill, this is how many source pixels land on each inch of 33×48 mm. 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 33×48 mm | To reach 300 DPI |
|---|---|---|---|---|
| 12 MP phone photo (4032×3024, 4:3) | 2080×3024 (left and right cut) | 48.4% | 1,600 DPI | reduced (0.19×) |
| 24 MP camera photo (6000×4000, 3:2) | 2751×4000 (left and right cut) | 54.2% | 2,117 DPI | reduced (0.14×) |
| Full HD screenshot (1920×1080, 16:9) | 743×1080 (left and right cut) | 61.3% | 571 DPI | reduced (0.53×) |
| Vertical phone video frame (1080×1920, 9:16) | 1080×1570 (top and bottom cut) | 18.2% | 831 DPI | reduced (0.36×) |
33×48 mm in pixels at each print resolution
Pixels = millimetres ÷ 25.4 × DPI. The panel uses 300 DPI unless you change it; the file sizes are for a portrait saved as JPEG.
| Resolution | Pixels | Megapixels | JPEG q75 | JPEG q90 |
|---|---|---|---|---|
| 150 DPI | 195×283 | 0.0552 MP | ≈ 11.6 KB | ≈ 18.3 KB |
| 200 DPI | 260×378 | 0.0983 MP | ≈ 17.4 KB | ≈ 27.8 KB |
| 300 DPI | 390×567 | 0.22 MP | ≈ 31.4 KB | ≈ 51.4 KB |
| 400 DPI | 520×756 | 0.39 MP | ≈ 48.6 KB | ≈ 80.8 KB |
| 600 DPI | 780×1134 | 0.88 MP | ≈ 90.5 KB | ≈ 158 KB |
Will a 33×48 mm photo fit a KB limit?
Saved at 300 DPI (390×567 px), a head-and-shoulders portrait of 33×48 mm comes to about 24.5 KB at JPEG quality 60, 31.4 KB at 75 and 51.4 KB at 90, and about 19.6 KB as WebP at 75. Dropping to 200 DPI (260×378 px) brings quality 75 down to about 17.4 KB, but the print then holds fewer pixels per inch.
At 300 DPI the photo fits under 20 KB up to quality 41 and under 50 KB up to quality 88; under 100 KB and 200 KB it fits even at quality 95. Set the KB limit next to the size and PixelFit picks the highest quality that fits.
Printing 33×48 mm copies
Without margins or cutting gaps, 9 copies fit on one 4×6 in (102×152 mm) photo print, 36 on an A4 sheet, 32 on US Letter (some turned sideways where that packs more). Print at 100% scale, never "fit to page", or a small ID photo of 33×48 mm comes out the wrong size; 390×567 px at 300 DPI is exact.
Sizes close to 33×48 mm
No other target in the PixelFit list has exactly 11:16. The nearest sizes (by pixel count and shape) and their crop from a 390×567 image:
- 400×600 portrait: 2:3, 3.1% cropped (left and right cut), then 1.058× scale.
- 35×45 mm passport photo: 7:9, 11.6% cropped (top and bottom cut), then 1.059× scale.
- 420×540 px photo: 7:9, 11.6% cropped (top and bottom cut), then 1.077× scale.
- 420×525 px photo: 4:5, 13.9% cropped (top and bottom cut), then 1.077× scale.
How to resize a picture to 33×48 mm
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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.
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Set the size
Pick mm as the unit, enter 33×48 mm and 300 DPI; the tool turns that into 390×567 pixels.
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Choose how it fits
Choose crop to fill to keep the 11:16 frame without stretching (a phone photo loses 48.4%, left and right cut). Fit inside keeps the whole picture as a 390×293 file instead; Pad with colour puts that on a full 390×567 canvas.
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Pick the format and download
Keep JPG (without a KB limit PixelFit saves at quality 85, about 41.5 KB for a head-and-shoulders portrait) 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 President Barack Obama.jpg by Pete Souza (Official White House photo) (Public domain): commons.wikimedia.org/wiki/File:President_Barack_Obama.jpg
Frequently asked questions
How do I resize a photo to 33×48 mm?
Open the photo in the PixelFit panel on this page, set 33×48 mm at 300 DPI (390 × 567 px), choose crop to fill and download. From a 12 MP phone photo that crops 48.4% (left and right cut) and still leaves 1,600 pixels per inch to work with.
How many pixels is 33×48 mm?
33×48 mm is 390×567 px at 300 DPI, 780×1134 px at 600 DPI and 195×283 px at 150 DPI (pixels = mm ÷ 25.4 × DPI).
What DPI should a 33×48 mm photo have?
PixelFit uses 300 DPI, which makes 33×48 mm exactly 390×567 px; print it at 100% scale. At 150 DPI the same 390×567 pixels would print 2.6×3.78 in, twice as large and with half the density.
How many 33×48 mm photos fit on one sheet?
Without margins, 36 fit on A4 (210×297 mm), 32 on US Letter and 9 on a 4×6 in photo print, turning them sideways where that packs more. Leave a few millimetres for cutting.
How big is a 33×48 mm JPEG at 300 DPI?
For a head-and-shoulders portrait about 31.4 KB at quality 75 (24.5 KB at 60, 51.4 KB at 90, 41.5 KB at the panel's default quality 85); a detailed outdoor photo is about 55.6 KB at quality 75, estimated from measured encodes of real sample photos at 390×567 px.
Related
Nearby sizes
- 400×600 portrait 2:3
- 35×45 mm passport photo 7:9
- 420×540 px photo 7:9
- 420×525 px photo 4:5
- 400×514 px photo 200:257 (about 7:9)
- 30×40 mm photo 3:4