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Enter a width and height in millimeters and set the DPI. Millimeter sizes are typical for ID photos, labels, stamps and small prints.
For standard sizes, browse the exact-millimeter presets, which show the conversion to pixels.
| Unit | millimeters |
|---|
Millimeters to pixels
| Size | 96 DPI | 300 DPI |
|---|---|---|
| 35 × 45 mm | 132 × 170 | 413 × 531 |
| 50 × 50 mm | 189 × 189 | 591 × 591 |
| 85.6 × 54 mm | 324 × 204 | 1011 × 638 |
| 105 × 148 mm | 397 × 559 | 1240 × 1748 |
| 210 × 297 mm | 794 × 1123 | 2480 × 3508 |
How the presets in this category work
Each preset below fills in a ready-made value, so you can skip typing it. Open any of them, add your photo, and the editor shows the settings already applied. You can still change every value before downloading: the preset is a starting point, not a lock.
If your exact value does not exist as a preset, use this page to enter your own. The result is processed in your browser with Lanczos-3 resampling for scaling, and is never uploaded.
How to resize an image in mm
- Add your image. Select a photo or drag it onto the box above. JPG, PNG, WebP, AVIF, HEIC and BMP files are accepted, and the file stays on your device.
- Enter your size. Type the width and height you need and choose the unit. The aspect-ratio lock keeps the proportions unless you turn it off.
- Download the result. Click resize and save the file.
Related presets
Nearby sizes in this category
More in this category: Resize Image to Exact Millimeter Sizes. For several photos at once, use the bulk image resizer.
Frequently asked questions
How many pixels is 1 mm?▼
Can I change the preset values after opening the editor?▼
Do I need an account, and does it add a watermark?▼
Looking for a different size or format?
Explore over 1,500+ curated presets for social media, print, and strict file sizes.