What is 4.5 cm × 3.5 cm in pixels at 200 DPI, and at 100 DPI?

276 × 354 at 200 DPI, 138 × 177 at 100 DPI and 827 × 1063 at 600 DPI. Enter the DPI from your notice and the rest is worked out. In Paint, which has no cm option, type the pixel pair.

Is 4.5 × 3.5 cm the same as 3.5 × 4.5 cm?

Yes, for an upright photo. Keep 3.5 as the width and 4.5 as the height; swapped, the frame turns landscape and “Crop to fill” takes away the forehead and the chin.

What ratio is a 3.5 × 4.5 cm photo?

7:9, or 0.78 as width over height, inside the 0.66 to 0.89 aspect ratio GATE 2026 allows. The ratio is the same at every DPI; only the pixel count changes.

My notice gives both 200 x 230 pixels and 4.5 cm × 3.5 cm. Which one do I follow?

The pixels, for the upload. 200 × 230 is what the bank notices call preferred, and its proportions differ slightly from the centimetres. Enter 200 and 230 in px, and keep a 3.5 × 4.5 cm version only for printing.

The result is 60 KB but my form allows 50 KB. What now?

Open the 50 KB compressor and drop the resized file in. It lowers JPG quality in steps and reduces pixels only if quality alone cannot get under 50 KB. If the form sets a floor as well, the increase tool handles a file that lands under it.

Resize Image to 3.5 x 4.5 cm (413 × 531 Pixels)

4.5 cm × 3.5 cm in pixels is 413 × 531 at 300 DPI. An inch is 2.54 cm, so 3.5 ÷ 2.54 × 300 = 413.386 and 4.5 ÷ 2.54 × 300 = 531.496, which round to 413 and 531. Lower the DPI and the count drops: 276 × 354 at 200 DPI, 207 × 266 at 150 DPI, 138 × 177 at 100 DPI and 132 × 170 at 96 DPI. So “resize image to 3.5 x 4.5 cm” really asks for one of those pixel pairs, and this page settles on 300 DPI unless your notice names another figure.

Here 3.5, 4.5, cm and 300 DPI are already typed in and “Crop to fill” is selected. A phone portrait is 3:4 and this frame is 7:9, a touch wider, so a thin strip comes off the top and bottom and nothing is squeezed. The DPI goes into the file too, so a print counter reads it as 3.5 by 4.5 centimetres.

Before and after

A dark blue passport lying on a plain black surface — The dashed frame on the left marks the part that fits the new shape. It was scaled to exactly 413 × 531 px, and the left and right edges outside the frame were trimmed.
The file went from 614 KB to 62 KB.
The image on the right is the actual file the tool above produced.

The same photo resized to 413 × 531 pixels — The dashed frame on the left marks the part that fits the new shape. It was scaled to exactly 413 × 531 px, and the left and right edges outside the frame were trimmed.
The file went from 614 KB to 62 KB.
The image on the right is the actual file the tool above produced.

How to use it

Start from the camera original or a studio file, not a forwarded copy or a screenshot.
Overwrite 300 with the DPI in your notice if it gives one; 300 suits a photo that may also be printed.
Keep “Crop to fill” for an exact 413 × 531. Tick “Lock aspect ratio” only if the notice wants the whole frame and will accept a narrower width.
Press Resize, check the pixels on the result card, then compare the KB figure with your form’s limit.

Why the DPI, not the centimetres, decides the pixel count

Centimetres describe paper, and a JPG holds only rows of pixels, so a notice quoting 3.5 cm × 4.5 cm has left one number out: how many pixels stand in for each inch of print, the DPI. Multiply the inches (3.5 cm is 1.378 in, 4.5 cm is 1.772 in) by it and the pixel size falls out. Double the DPI and the pixels double, while the photo on paper stays the same size.

Notices rarely say which DPI they assumed, so the same photo appears as 130 × 170 pixels on one portal and 413 × 531 on another. Where only centimetres and a KB limit appear, 200 DPI keeps the file light and 300 keeps it crisp; either meets the stated size because the DPI travels inside the file. Compressing drops that field; the DPI tool puts it back without touching the pixels.

Forms that state 3.5 × 4.5 cm, as their notices write it

Type px here. IBPS, in its CRP PO/MT-XV, CSA-XV, SPL-XV and RRBs XV notices (2025): 200 x 230 pixels (preferred); 4.5cm × 3.5cm, JPG/JPEG, 20 KB to 50 KB, repeated in the 2025 SBI Probationary Officers and Junior Associates advertisements, the NABARD Assistant Manager Grade ‘A’ notice and the RBI Services Board Grade ‘B’ advertisement; enter those pixels directly, they are squarer than the cm. Tamil Nadu Public Service Commission, Group II and IIA 2025: 4.5 cm height x 3.5 cm width (170 pixels x 130 pixels), JPG, 20 KB to 50 KB, name and photo date along the lower edge; enter 130 × 170.

Keep cm here. CBSE, CTET September 2026: 3.5 cm (width) x 4.5 cm (height), JPG/JPEG, 10 KB to 100 KB. Maharashtra Public Service Commission, online application: breadth 3.5 cm x height 4.5 cm, JPG/JPEG, up to 50 KB. IIT Guwahati, GATE 2026: 3.5 cm width × 4.5 cm height, minimum 200 x 260 pixels, maximum 530 x 690 pixels, 5 KB to 600 KB; 300 DPI lands inside that window, 400 DPI would push the width past 530. Passport Seva, ICAO-compliant photograph guideline: 4.5 cm length x 3.5 cm width, for the upload and the printed copy alike.

Orientation, inches and file weight

Bank notices name the height first, exam boards the width first; both mean an upright picture 3.5 cm across and 4.5 cm tall. In inches that is 1.38 × 1.77, in millimetres 35 × 45, which is how the German Missions write the Schengen visa photo (35 x 45 mm).

Pixels decide most of the weight. At this page’s JPG quality, three head-and-shoulders portraits on plain backgrounds came out between 43 KB and 61 KB at 413 × 531 and between 22 KB and 33 KB at 276 × 354; a busy background costs more. A 130 × 170 file usually lands below the TNPSC floor of 20 KB, so plan on the increase tool there.

Frequently asked questions

What is 4.5 cm × 3.5 cm in pixels at 200 DPI, and at 100 DPI?: 276 × 354 at 200 DPI, 138 × 177 at 100 DPI and 827 × 1063 at 600 DPI. Enter the DPI from your notice and the rest is worked out. In Paint, which has no cm option, type the pixel pair.
Is 4.5 × 3.5 cm the same as 3.5 × 4.5 cm?: Yes, for an upright photo. Keep 3.5 as the width and 4.5 as the height; swapped, the frame turns landscape and “Crop to fill” takes away the forehead and the chin.
What ratio is a 3.5 × 4.5 cm photo?: 7:9, or 0.78 as width over height, inside the 0.66 to 0.89 aspect ratio GATE 2026 allows. The ratio is the same at every DPI; only the pixel count changes.
My notice gives both 200 x 230 pixels and 4.5 cm × 3.5 cm. Which one do I follow?: The pixels, for the upload. 200 × 230 is what the bank notices call preferred, and its proportions differ slightly from the centimetres. Enter 200 and 230 in px, and keep a 3.5 × 4.5 cm version only for printing.
The result is 60 KB but my form allows 50 KB. What now?: Open the 50 KB compressor and drop the resized file in. It lowers JPG quality in steps and reduces pixels only if quality alone cannot get under 50 KB. If the form sets a floor as well, the increase tool handles a file that lands under it.