Passport Photo Size Converter accuracy and testing

Formula source

• Width inches = entered width or millimeters / 25.4. Height inches = entered height or millimeters / 25.4. Target pixels = inches x target DPI. Source scale factor = min(source width / target width, source height / target height). Head-height pixels = entered head-height range converted to inches x target DPI.

Test cases

Known limitations

• This converter does not inspect image quality, background, shadows, face position, glasses, expression, recentness, file size, compression, or official portal validation rules.

Assumptions

• The calculator converts only the measurements entered by the user.
• DPI is treated as pixels per inch for the target output.
• This planning estimate runs locally in your browser from the values you enter. It is not legal advice, not an official government fee or timeline, and not a document or photo acceptance determination.

Unit handling

• Required Photo Width accepts numeric values.
• Required Photo Height accepts numeric values.
• Dimension Unit accepts one of the configured options.
• Target DPI accepts values in dpi.
• Source Image Width accepts values in px.
• Source Image Height accepts values in px.
• Minimum Head Height accepts numeric values.
• Maximum Head Height accepts numeric values.
• Target Width is displayed in px.
• Target Height is displayed in px.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Input precision follows configured step values where provided.

Version history

Change log