Photo Size Converter: Convert mm, cm, Inches, and Pixels Free
A photo size converter helps you convert photo dimensions between millimeters (mm), centimeters (cm), inches, and pixels. Whether you need to convert 35mm to inches, find the pixel size of a 2x2 inch photo, or calculate DPI conversions for passport and ID photos, our free online photo size converter does it instantly. Pixel conversion requires a DPI value — 300 DPI is the standard for printed passport and visa photos, while 72 or 96 DPI is common for screen use.
Convert a size
Millimeters
35.00 mm
Centimeters
3.50 cm
Inches
1.378 in
Pixels at 300 DPI
413 px
Common ID Photo Sizes in mm, cm, inches, and pixels
Pixel values below are given at 300 DPI, the standard for printed passport and visa photos. Tap a size to open it in the photo maker. Use this chart to quickly compare photo dimensions across units.
| Size | mm | cm | Inches | Pixels (300 DPI) | Used for |
|---|---|---|---|---|---|
| 35×45 mm | 35 × 45 mm | 3.5 × 4.5 cm | 1.38 × 1.77 in | 413 × 531 px | Passport & visa (UK, Australia, Schengen, Philippines) |
| 2×2 in (51×51 mm) | 51 × 51 mm | 5.1 × 5.1 cm | 2 × 2 in | 600 × 600 px | US passport & visa, green card, India passport |
| 1×1 in (25×25 mm) | 25.4 × 25.4 mm | 2.54 × 2.54 cm | 1 × 1 in | 300 × 300 px | Government ID cards, forms, 1x1 ID photos |
| 33×48 mm | 33 × 48 mm | 3.3 × 4.8 cm | 1.30 × 1.89 in | 390 × 567 px | China visa & passport |
| 40×60 mm | 40 × 60 mm | 4.0 × 6.0 cm | 1.57 × 2.36 in | 472 × 709 px | Indonesia & Vietnam passports |
| 50×60 mm | 50 × 60 mm | 5.0 × 6.0 cm | 1.97 × 2.36 in | 591 × 709 px | Turkey passport & ID |
| 35×50 mm | 35 × 50 mm | 3.5 × 5.0 cm | 1.38 × 1.97 in | 413 × 591 px | Malaysia passport |
| 50×70 mm | 50 × 70 mm | 5.0 × 7.0 cm | 1.97 × 2.76 in | 591 × 827 px | Canada passport & PR card |
| 54×86 mm | 54 × 86 mm | 5.4 × 8.6 cm | 2.13 × 3.39 in | 638 × 1016 px | Work permits (Singapore, Malaysia) |
| 45×45 mm | 45 × 45 mm | 4.5 × 4.5 cm | 1.77 × 1.77 in | 531 × 531 px | Japan visa & residence card |
| 35×40 mm | 35 × 40 mm | 3.5 × 4.0 cm | 1.38 × 1.57 in | 413 × 472 px | National ID cards, work permits |
| 30×40 mm | 30 × 40 mm | 3.0 × 4.0 cm | 1.18 × 1.57 in | 354 × 472 px | Work & residence permits, student ID |
| 45×35 mm | 45 × 35 mm | 4.5 × 3.5 cm | 1.77 × 1.38 in | 531 × 413 px | Landscape ID cards |
| 10×15 cm (4×6 in) | 100 × 150 mm | 10 × 15 cm | 3.94 × 5.91 in | 1181 × 1772 px | Standard photo print (4R size) |
Need to convert a specific size? Use the converter tool at the top of the page to convert between mm, cm, inches, and pixels at any DPI. The 35mm x 45mm to inches conversion gives 1.38 × 1.77 inches. A 35mm x 45mm photo in pixels at 300 DPI is 413 × 531 px. For a 2 inch photo, the size in mm is about 50.8mm — this is the US passport 2x2 format.
How to Convert Photo Size: mm to Inches to Pixels
Converting photo sizes between units is straightforward once you know the formulas. Here is how each conversion works:
Millimeters to inches. Divide millimeters by 25.4. For example, 35mm ÷ 25.4 = 1.38 inches. The 35x45mm to inches conversion is 1.38×1.77 inches.
Inches to millimeters. Multiply inches by 25.4. For example, 2 inches × 25.4 = 50.8mm (rounded to 51mm for passport photos).
Millimeters to centimeters. Divide millimeters by 10. 35mm = 3.5cm.
Pixels to millimeters (and vice versa). This depends on DPI. At 300 DPI: mm = pixels ÷ 300 × 25.4, and pixels = mm ÷ 25.4 × 300. For example, 35mm at 300 DPI = 35 ÷ 25.4 × 300 = 413 pixels.
What is 2 inch photo size? A 2-inch photo is 50.8mm or 5.08cm. At 300 DPI it is 600 pixels. This is the width of a standard US passport photo.
What is DPI and Why Does It Matter?
DPI stands for dots per inch — it measures the resolution or print quality of an image. The higher the DPI, the sharper the printed photo will be.
- 72 DPIScreen/web standard. Not suitable for printing.
- 96 DPIComputer screen standard. Not for print use.
- 150 DPILow print quality. Not recommended for ID photos.
- 300 DPIStandard for printed passport, visa, and ID photos. This is what you should use.
- 600 DPIHigh-resolution print quality. Produces the sharpest results.
For passport and visa photos, always use 300 DPI or higher. A 35mm x 45mm photo in pixels at 300 DPI is 413×531px, which is the standard for online visa submissions. At 600 DPI, the same 35×45mm photo is 827×1063 pixels.
Photo Size Conversion Questions
How many pixels is a 35×45 mm photo?▾
At 300 DPI, a 35×45 mm photo is 413×531 pixels. This is the standard passport size for the UK, Australia, and the Schengen area. At 600 DPI, the same 35×45mm photo is 827×1063 pixels. Always use 300 DPI or higher for printed ID and passport photos.
What is 35×45 mm in inches?▾
35×45 mm is about 1.38 × 1.77 inches. To convert millimeters to inches, divide by 25.4: 35 ÷ 25.4 = 1.38 inches and 45 ÷ 25.4 = 1.77 inches. This is the ICAO standard passport photo size used by most of the world.
How many pixels is a 54×86 mm photo?▾
At 300 DPI, a 54×86 mm photo is 638×1016 pixels. This is a common size for work permits in Singapore and Malaysia. At 600 DPI, the same size is 1276×2032 pixels.
How many pixels is a 10×15 cm photo?▾
At 300 DPI, a 10×15 cm photo is 1181×1772 pixels — the standard size for 4R printed photo paper. This is the common "4×6 inch" print size. At 600 DPI, it is 2362×3543 pixels.
What is 2×2 inches in millimeters?▾
2×2 inches is 50.8×50.8 mm, usually rounded to 51×51 mm, or 600×600 px at 300 DPI. This is the US passport and visa photo size. The exact conversion is 2 × 25.4 = 50.8mm per side.
What is 1×1 inch in centimeters?▾
1×1 inch is 2.54×2.54 cm, or 300×300 px at 300 DPI. This 1x1 photo size is commonly used for government ID cards, school forms, and various official applications in the Philippines and other countries.
How to convert photo into passport size free?▾
To convert a photo to passport size for free, use our passport photo maker. Upload your image, select the country passport size you need, adjust the crop, and download. The tool automatically resizes to the correct dimensions, removes the background, and outputs at 300 DPI — completely free.
How can I convert my photo to passport size for free?▾
You can convert your photo to passport size for free using our online passport photo tool. Upload any photo, choose your country's passport specification, position your face in the frame, and download the result. No signup, no payment, no watermark — just a free, correctly sized passport photo.
How to convert pic into passport size photo?▾
To convert a picture to passport size, upload your image to our passport photo maker. Select the correct country or document type, and the tool automatically sets the right dimensions. Adjust your face position, choose a background color, then download the passport-size photo at 300 DPI.
What is 2 inch photo size?▾
A 2-inch photo typically refers to the width of a US passport photo, which is 2×2 inches (51×51mm). In millimeters, 2 inches equals 50.8mm (usually rounded to 51mm). In pixels at 300 DPI, a 2-inch width is 600 pixels. The full 2×2 inch photo is 600×600 pixels.
What is the size of a 1×1 picture?▾
A 1×1 picture is 1 inch by 1 inch (25.4×25.4mm). In centimeters, it is 2.54×2.54 cm. In pixels at 300 DPI, a 1x1 picture is 300×300px. This square format is commonly used for ID cards, school forms, and government applications.
What is the cm of a 1x1 picture?▾
A 1x1 picture is 2.54 × 2.54 centimeters. Since 1 inch equals 2.54 cm, a 1×1 inch photo converts to exactly 2.54cm on each side. This is often rounded to 2.5cm for practical use. In millimeters, the same 1x1 photo is 25.4×25.4mm.
References and standards
Conversions use 25.4 mm per inch and the DPI value you select. The official photo sizes in the table come from the specifications published by each issuer, and are updated when those change — check the issuing authority for the application you are submitting.
- ICAO — Machine Readable Travel Document standards (Doc 9303)
- US Department of State — visa photo pixel range
- GOV.UK — passport photo rules
Last reviewed 2026-09-13.