Centimetres, pixels and DPI — in plain words
A digital photo has no physical size; it only has pixels. Centimetres appear when the photo is printed or when a form converts pixels at a chosen DPI (dots per inch). One inch is 2.54 cm, so:
| DPI | Width (3.5 cm) | Height (4.5 cm) | Typical use |
|---|---|---|---|
| 150 | 207 px | 266 px | Very small KB limits (10–30 KB) |
| 200 | 276 px | 354 px | Most online forms (20–50 KB) |
| 300 | 413 px | 531 px | Printing, or portals allowing 100–200 KB |
Formula: pixels = cm ÷ 2.54 × DPI. If a form says “3.5 × 4.5 cm, 20–50 KB” and nothing about pixels, the 200 DPI preset is a balanced choice.
How to take a photo that passes
- Background: plain white or very light wall, no patterns or shadows.
- Light: face a window in daytime; avoid overhead tube-light shadows.
- Pose: look straight, mouth closed, both ears visible, no tilt.
- Distance: camera 1–1.5 m away at eye level; avoid selfie distortion.
- Accessories: no cap or dark glasses; spectacles only without glare if allowed.
Using the tool
- Choose a DPI preset. The KB window is pre-filled; change it under “Edit the numbers” if your notice says otherwise.
- Upload your photo and drag it so your face is centred, with a little space above the head.
- Use Zoom until the face fills roughly three quarters of the height.
- Press Create. Green ticks mean the exact pixels and KB range are met.
Hinglish: 3.5 x 4.5 cm photo banane ke liye 200 DPI preset sabse safe hai. Print karna ho to 300 DPI chuniye aur phir Passport Photo Maker se A4 sheet bana lijiye.
Related sizes you may need
Bank exams usually specify pixels (200 × 230 px) — see IBPS sizes. Some forms want the name and date printed under the photo — use Photo with Name and Date. For a signature in centimetres, see the SSC 6 × 2 cm signature tool.