Utility calculatorUpdated April 5, 2026

Passport Photo mm to Pixels Calculator (2026): Convert 2x2, 35x45, 50x70, and Custom Sizes at 300/600 DPI

Convert passport photo sizes from millimeters or inches into pixels at 300 and 600 DPI, check the reverse pixel-to-mm math, and compare common formats like 2x2, 35x45, 40x50, and 50x70.

Convert passport photo sizes between mm, inches, and pixels

Use this calculator when you need exact pixel dimensions for print or want to reverse-check whether an uploaded image still matches the physical size you expect. The math uses the same unit-conversion functions that Passlens uses internally for preset export sizing.

Common passport and visa formats

Physical size to pixels

Width (mm)Height (mm)DPI

Width (px): 413
Height (px): 531
Width (in): 1.378
Height (in): 1.772

Pixels to physical size

Width (px)Height (px)DPI

Width (mm): 34.97
Height (mm): 44.96
Width (in): 1.377
Height (in): 1.77

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How the mm-to-pixels math works

The conversion itself is simple once the physical size is known. One inch is exactly 25.4 millimeters. To convert millimeters to pixels at a given print density, you first convert millimeters to inches and then multiply by the target DPI (dots per inch). Passlens uses that exact rule when it generates print-aware pixel outputs from preset measurements.

That is why a 35 × 45 mm photo becomes about 413 × 531 pixels at 300 DPI, and about 827 × 1063 pixels at 600 DPI. A 2 × 2 inch U.S. passport photo works the other way around: two inches multiplied by 300 DPI becomes 600 pixels on each side.

Why this matters for passport-photo users

Searchers often mix together three different ideas: the physical photo size, the digital image size in pixels, and the print density. Those are related, but they are not interchangeable. A digital upload might care mostly about pixel dimensions and file size. A printed passport photo is measured in millimeters or inches. That is exactly why passport-photo pages need both size guides and calculator surfaces like this one.

Use this utility together with the DPI and pixels hub, the passport photo DPI guide, and the exact country or document page you are actually applying through. The calculator answers the size math. The country guide answers whether the authority accepts that output for your document.

Verified examples from official requirement pages

Official passport and visa instructions are a useful reality check because they show how the same unit-conversion math appears in real application workflows. The U.S. Department of State and the U.S. visa composition template both point to a 2 × 2 inch photo, which means 600 × 600 pixels at 300 DPI and 1200 × 1200 pixels at 600 DPI.

Canada uses a 50 × 70 mm passport photo. That becomes about 591 × 827 pixels at 300 DPI and about 1181 × 1654 pixels at 600 DPI. For many European and residence-permit style workflows, the physical frame is 35 × 45 mm. Polish Office for Foreigners guidance also publishes a digital minimum of 684 × 883 pixels for that same ratio, which shows why digital upload portals may ask for pixel thresholds that are stricter than the bare minimum print math.

That difference matters: a calculator can tell you the minimum mathematically equivalent size at a chosen DPI, while the official portal can still demand a higher pixel floor, a file-size cap, or a specific upload format. Always pair the conversion result with the authority page that governs your actual submission route.

Practical checkpoints before you export or print

Confirm whether your target workflow is print-first or digital-upload-first.
Use the correct physical size first: 2x2, 35x45, 40x50, 50x70, or the authority-specific preset.
If you are printing, keep the printer at actual size / 100% scale and avoid fit-to-page.
If you are uploading, verify the portal still accepts the file dimensions, file size, and image format after export.
When in doubt, compare the result with the passport photo size in pixels guide and the relevant country page before submission.