Resize image to passport photo size
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The widely used passport photograph format is 35mm wide by 45mm tall, which at 300 DPI print resolution works out to roughly 413 by 531 pixels. That ratio — slightly taller than it is wide — is what makes a passport photo look correct, and it is the part most people get wrong when they crop a photo themselves. A square crop or a standard 3:4 phone photo will either be rejected outright or come back looking subtly off, with too much headroom or the head cropped uncomfortably close. This tool resizes to a target width while preserving your image's own aspect ratio, so for a true passport photo the sequence matters: crop your photo to the 35:45 proportion first, then resize it here to the pixel dimensions you need. Resizing alone cannot fix framing. It is also worth knowing that different authorities have their own variations on the standard — some countries and some Indian government processes specify different dimensions, head-height proportions, or background colours — so treat 35x45mm as the common default rather than a universal rule, and check the specific requirement for whatever you are applying to.
Passport photo dimensions are not universal
There is no single passport photo size. India uses 35×45mm for most official purposes, the United States requires 51×51mm (2×2 inches), Schengen countries use 35×45mm with their own framing rules about how much of the frame the head must occupy, and China uses 33×48mm. The dimension is only half the specification — head height within the frame, eye position, background colour and expression are all specified separately, and a photo at exactly the right millimetres can still be rejected for having the head too small in the frame. Always work from the requirements published by the authority you are actually applying to.
Millimetres, pixels and DPI
Physical size in millimetres only becomes a pixel count once you fix a print resolution. At 300 DPI — the standard for photo printing — a 35×45mm photo is roughly 413×531 pixels, and a 51×51mm photo is roughly 602×602. If you are uploading to a portal it will usually specify pixels directly and DPI becomes irrelevant; if you are printing, DPI is what determines whether the print looks sharp. Resize to the pixel dimensions your specific use requires, and when printing at home, print on photo paper at actual size with any 'fit to page' scaling switched off, or the print will not measure what it should.
Frequently asked questions
- What is the standard Indian passport photo size?
- 35×45mm is the standard for Indian passport and most official applications, which is about 413×531 pixels at 300 DPI. Confirm against the specific application, as some Indian government forms specify different dimensions.
- Is a US passport photo the same size?
- No. The United States requires 51×51mm (2×2 inches), roughly 602×602 pixels at 300 DPI — a square format, unlike the 35×45mm rectangle used in India and across the Schengen area.
- What background colour should a passport photo have?
- Plain white or light grey for most authorities, evenly lit with no shadow falling behind the head. Patterned, dark or textured backgrounds are rejected, as are shadows cast on the wall behind you.
- Can I crop a normal photo into a passport photo?
- Only if the original meets the framing rules — front-facing, neutral expression, both ears and the full head visible, plain background, even lighting. Cropping changes dimensions; it cannot fix a pose, an expression or a busy background.
- How much of the frame should my head fill?
- Most authorities specify head height as a proportion of the total image, commonly between 70% and 80%. This is a separate requirement from the overall dimensions and a frequent cause of rejection for otherwise correctly sized photos.
- Why does my printed photo measure wrong?
- Print scaling. Set the print dialog to actual size or 100% and disable 'fit to page' or 'scale to fit'. Printing at the correct DPI on photo paper is what makes the physical measurement come out right.