Aspect ratio: how to resize a photo without stretching your face
Updated 11 October 2026
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Ever uploaded a form photo and found your face looking wider or thinner than in real life? That is an aspect ratio problem. It happens when a photo of one shape is forced into a box of another shape. Here is how to avoid it.
What is aspect ratio?
Aspect ratio is the relationship between width and height. It is written as width : height.
- A phone photo of 3000 × 4000 px has a ratio of 3 : 4, which is 0.75 (width ÷ height).
- A 200 × 230 px form photo has a ratio of 20 : 23, about 0.87.
- A 3.5 × 4.5 cm passport photo is 7 : 9, about 0.78.
- A 2 × 2 inch photo is 1 : 1, a square.
If the two numbers differ, the shapes differ, and you have to decide how to make the photo fit.
Three ways to fit a photo
| Method | What happens | Good for forms? |
|---|---|---|
| Stretch | Width and height scaled by different amounts | No, distorts the face |
| Crop | Cut away some edges, then scale evenly | Yes, best choice |
| Pad | Scale evenly to fit, fill empty space with a plain colour | Acceptable if the padding matches the background |
Worked example: 3000 × 4000 to 200 × 230
Stretching (avoid)
To reach 200 px wide, the width shrinks by 200 ÷ 3000 = 0.0667. To reach 230 px tall, the height shrinks by 230 ÷ 4000 = 0.0575. The height is squeezed more than the width: 0.0575 ÷ 0.0667 ≈ 0.86. So everything looks about 14% shorter than it should, and your face appears noticeably wider and flatter. Many basic resizers do this by default when you type both width and height.
Cropping (recommended)
Keep the full width of 3000 px and work out the height that has the target shape: 3000 × 230 ÷ 200 = 3450 px. So crop the photo to 3000 × 3450 by removing 550 px of height, for example a little from the top and more from the bottom (below the shoulders). Now both sides shrink by the same factor (200 ÷ 3000 = 230 ÷ 3450 ≈ 0.0667) to give 200 × 230 with no distortion.
In practice you will usually crop much tighter than this, because a phone photo includes a lot of wall and body. A head-and-shoulders crop of about 1300 × 1495 px (same 200 : 230 shape) makes your face fill the frame as most notices want.
Padding (when you cannot crop)
Scale the whole photo evenly so that it fits inside the box. The limiting side is height: 230 ÷ 4000 = 0.0575, giving a width of 3000 × 0.0575 = 172.5, about 173 px. That leaves 200 − 173 = 27 px of empty width, split into 13 px and 14 px bands on the left and right, filled with white. This keeps proportions correct but makes your face smaller in the frame, so cropping is still better for portraits. Padding is more useful for signatures and documents where you must not cut anything off.
Handy target ratios
| Target size | Ratio (w ÷ h) | Crop from a 3000 px wide photo |
|---|---|---|
| 200 × 230 px | 0.870 | 3000 × 3450 |
| 3.5 × 4.5 cm | 0.778 | 3000 × 3857 |
| 2 × 2 inch | 1.000 | 3000 × 3000 |
| Signature 3.5 × 1.5 cm | 2.333 | 3000 × 1286 |
How our tools handle it
Resize Photo and Resize Signature lock the crop box to the shape you need, so you drag it over your face or signature and the output is never stretched. Resize Image gives you the choice of crop, pad or, if you really want it, stretch.
Tips
- Leave a little space above the head; do not crop through the hair.
- Keep your eyes roughly in the upper half of the frame, a little above the centre.
- Rotate before cropping if the photo is tilted.
- Check the result at full size: if faces look wider or thinner than the original, something was stretched.
Need the pixel numbers for a cm size? See pixels, cm and DPI.
Questions people ask
- What is aspect ratio in a photo?
- It is the ratio of width to height. A 3000 x 4000 photo has a 3:4 ratio, while a 2 x 2 inch photo is 1:1.
- Why does my face look stretched after resizing?
- The tool scaled width and height by different amounts because the photo and the target box have different shapes. Crop to the target shape first.
- Should I crop or pad a passport photo?
- Crop. Padding keeps proportions but makes your face smaller in the frame, while most notices want the face to fill most of the photo.
- How do I convert a 3:4 photo to 200 x 230 pixels?
- Crop it to the 200:230 shape, for example 3000 x 3450 from a 3000 x 4000 photo, then scale it down evenly to 200 x 230.