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Resize an image to 4000×3000 pixels
To resize an image to 4000×3000 px, enter 4000 × 3000 px and pick crop to fill so the 4:3 frame is not stretched: a 4:3 phone photo already has this shape and is only scaled by 0.992×. The result has 12 megapixels; as a JPEG, a detailed outdoor photo is about 3.3 MB at the panel's default quality 85 (2.5 MB at quality 75, extrapolated).
4000×3000 px
JPG · no file-size limit · 4000x3000 px · white background
No file-size limit is set: PixelFit saves at high quality and changes only the format and any pixel size you set.
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.
4000×3000 at a glance
| Pixel size | 4000×3000 px (12,000,000 pixels) |
|---|---|
| Aspect ratio | 4:3, landscape (width ÷ height = 1.3333) |
| Megapixels | 12 MP |
| Decoded in memory | 45.8 MB RGBA · 34.3 MB RGB |
| Sharp on screen at | 4000×3000 CSS px at 1×, 2000×1500 at 2×, 1333×1000 at 3× density |
| Print size at 300 DPI | 13.33×10 in (33.9×25.4 cm) |
| Estimated JPEG (outdoor photo, quality 75) | 2.5 MB (extrapolated) |
| JPEG without a KB limit (panel default, quality 85) | 3.3 MB (extrapolated) |
What 4000×3000 means in pixels
4000×3000 is a landscape frame, 1.33 times as wide as it is tall, 12,000,000 pixels in total (12 megapixels). Its sides reduce to 4:3 (1.3333 as a decimal), so any picture cropped to 4:3 scales to it without distortion.
That is 98.4% of a 12 MP phone frame, close to the most a phone delivers; after the crop the picture is scaled by 0.992×, so check edges and text at 100% zoom. Shown 1:1 it fills 4000×3000 CSS px on a standard screen and 2000×1500 CSS px on a 2× (Retina-class) screen; at 72 DPI the same pixels span 55.6×41.7 inches.
Decoded for editing it occupies 45.8 MB of memory (4 bytes per pixel); uncompressed 24-bit RGB would be 34.3 MB, which is why the downloadable JPEG, PNG or WebP is far smaller.
Getting 4000×3000 from a phone, camera or screenshot
Filling 4000×3000 from a 12 MP phone photo (4032×3024, 4:3) loses nothing; a vertical phone video frame (1080×1920, 9:16) loses the most (57.8%). "Fit inside" keeps the whole picture instead and the file comes out at the size in the last column; "Pad with colour" adds bars to reach the full 4000×3000.
| Starting image | Crop to fill keeps | Area lost | Scale | Fit inside gives |
|---|---|---|---|---|
| 12 MP phone photo (4032×3024, 4:3) | 4032×3024 (nothing cut) | 0% | 0.992× (reduced) | 4000×3000 |
| 24 MP camera photo (6000×4000, 3:2) | 5333×4000 (left and right cut) | 11.1% | 0.75× (reduced) | 4000×2667 |
| Full HD screenshot (1920×1080, 16:9) | 1440×1080 (left and right cut) | 25% | 2.778× (enlarged) | 4000×2250 |
| Vertical phone video frame (1080×1920, 9:16) | 1080×810 (top and bottom cut) | 57.8% | 3.704× (enlarged) | 1688×3000 |
When 4000×3000 means enlarging
After the crop to fill, the kept region has to be enlarged 2.778× from a Full HD screenshot and 3.704× from a vertical phone video frame. Enlarging adds pixels but no detail, so start from the largest original you have, or choose a smaller target if the destination allows it: 3000×3000 square or 3000×2000 landscape would need less stretching.
How many KB is a 4000×3000 image?
Estimated from encodes of real sample images measured with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026, interpolated to 12,000,000 pixels; this size lies outside the measured range, so the figures are extrapolated. The outdoor photo at 4000×3000 is about 2.5 MB at quality 75 and a scanned page about 985 KB; your file will differ with detail and noise.
| Image type | JPEG q60 | JPEG q75 | JPEG q90 | WebP q75 | PNG |
|---|---|---|---|---|---|
| Portrait photo | ≈ 612 KB | ≈ 905 KB | ≈ 1.75 MB | ≈ 398 KB | ≈ 11.4 MB |
| Outdoor photo | ≈ 1.91 MB | ≈ 2.5 MB | ≈ 4.1 MB | ≈ 2.06 MB | ≈ 21.2 MB |
| Scanned document | ≈ 704 KB | ≈ 985 KB | ≈ 1.81 MB | ≈ 460 KB | ≈ 10.1 MB |
| Flat graphic or logo | ≈ 149 KB | ≈ 173 KB | ≈ 235 KB | ≈ 78.9 KB | ≈ 226 KB |
Will a 4000×3000 photo fit an upload limit?
The highest JPEG or WebP quality that stays under each limit at exactly 4000×3000 px, from the same measurements. Set the KB limit next to the pixel size and PixelFit runs this search on your own photo.
| Limit | Portrait, JPEG | Outdoor photo, JPEG | Outdoor photo, WebP |
|---|---|---|---|
| Under 1 MB | up to quality 77 | does not fit even at quality 30 | does not fit even at quality 30 |
| Under 2 MB | up to quality 91 | up to quality 61 | up to quality 68 |
| Under 5 MB | fits at quality 95 | up to quality 92 | fits at quality 95 |
Is 4000×3000 good for print?
Pixels carry no physical size until you pick a DPI. At 300 DPI, the resolution PixelFit uses for its print and ID photo sizes, 4000×3000 covers 13.33×10 in; at 150 DPI the same pixels stretch to 26.67×20 in with half the density.
| Resolution | Print size (inches) | Print size (cm) |
|---|---|---|
| 72 DPI | 55.56×41.67 in | 141.1×105.8 cm |
| 96 DPI | 41.67×31.25 in | 105.8×79.4 cm |
| 150 DPI | 26.67×20 in | 67.7×50.8 cm |
| 200 DPI | 20×15 in | 50.8×38.1 cm |
| 300 DPI | 13.33×10 in | 33.9×25.4 cm |
| 600 DPI | 6.67×5 in | 16.9×12.7 cm |
How 4000×3000 shows on common screens
Shown full screen without cropping, 4000×3000 is scaled by the factor below; bars fill the space where the shapes differ.
| Screen | Scale | Shown at | Bars |
|---|---|---|---|
| Laptop 1366×768 | 0.26× (reduced) | 1024×768 | 342 px left and right in total |
| Full HD 1920×1080 | 0.36× (reduced) | 1440×1080 | 480 px left and right in total |
| QHD 2560×1440 | 0.48× (reduced) | 1920×1440 | 640 px left and right in total |
| 4K UHD 3840×2160 | 0.72× (reduced) | 2880×2160 | 960 px left and right in total |
| Phone, portrait 1080×1920 | 0.27× (reduced) | 1080×810 | 1110 px top and bottom in total |
Other 4:3 sizes
These targets share the exact 4:3 ratio of 4000×3000, so resizing between them is a pure scale with nothing cropped.
| Size | Scale from 4000×3000 | Megapixels |
|---|---|---|
| 2048×1536 (QXGA) | 0.51× | 3.15 MP |
| 1600×1200 (UXGA) | 0.4× | 1.92 MP |
| 1280×960 landscape | 0.32× | 1.23 MP |
| 1200×900 landscape | 0.3× | 1.08 MP |
| 1024×768 (XGA) | 0.26× | 0.79 MP |
| 1000×750 landscape | 0.25× | 0.75 MP |
| 800×600 (SVGA) | 0.2× | 0.48 MP |
| 640×480 (VGA) | 0.16× | 0.31 MP |
How to resize a picture to 4000×3000
-
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
Enter 4000 as the width and 3000 as the height in pixels (the panel is already set to 4000×3000).
-
Choose how it fits
Choose crop to fill: a 4:3 phone photo already matches, so nothing is cut.
-
Pick the format and download
Choose JPG or WebP; without a KB limit PixelFit saves JPG at quality 85, about 3.3 MB for a detailed outdoor photo. Add a KB limit if the upload has one or the file should be smaller, then download the 4000x3000 file.
Sources
- 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 an image to 4000x3000?
Open the image in the PixelFit panel on this page, set 4000 × 3000 px, choose crop to fill so nothing is stretched and download. From a 12 MP phone photo that only scales the picture and scales the rest by 0.992×.
What aspect ratio is 4000x3000?
4000x3000 has an aspect ratio of 4:3: landscape, width ÷ height = 1.3333. Sizes with the same ratio include 2048×1536 (QXGA), 1600×1200 (UXGA) and 1280×960 landscape.
Is 4000x3000 good for print?
At 300 DPI 4000x3000 prints 13.33×10 in (33.9×25.4 cm), enough for a print of that size at full density. At 150 DPI it stretches to 26.67×20 in.
How big is a 4000x3000 JPEG file?
For a detailed outdoor photo about 2.5 MB at quality 75 (1.91 MB at 60, 4.1 MB at 90, 3.3 MB at the panel's default quality 85); a head-and-shoulders portrait is about 905 KB at quality 75, extrapolated from encodes of real sample photos measured up to 6.75 MP (4000×3000 px lies outside that range). A flat graphic is smaller, a noisy low-light photo larger.
Related
Same 4:3 ratio
Nearby sizes
- 12×12 inch print 1:1
- 5120×2880 (5K) 16:9
- 4000×4000 square 1:1
- 3000×3000 square 1:1
- 3000×2000 landscape 3:2
- 3840×2160 (4K UHD) 16:9