Pixels to Physical Size Calculator

Convert a pixel dimension to its physical size in inches at the entered PPI.

How to use Pixels to Physical Size Calculator

1. Enter Pixels, PPI, Print Size Unit. 2. Choose inches, cm or mm for the physical size. PPI always means pixels per inch; centimetres use exactly 2.54 per inch and millimetres 25.4 per inch. Match the same axis. This is a numeric estimate, not a file/metadata transformation or printer guarantee. 3. Select Calculate or press Enter. 4. Select Copy result to copy the answer, or Reset to clear the form and result.

Why use this tool?

Choose inches, cm or mm for the physical size. PPI always means pixels per inch; centimetres use exactly 2.54 per inch and millimetres 25.4 per inch. Match the same axis. This is a numeric estimate, not a file/metadata transformation or printer guarantee.

How the calculation works

Physical inches = pixels along one axis ÷ pixels per inch. Choose inches, cm or mm for the physical size. PPI always means pixels per inch; centimetres use exactly 2.54 per inch and millimetres 25.4 per inch. Match the same axis. This is a numeric estimate, not a file/metadata transformation or printer guarantee. Counts and dimensions use the declared rounding convention; other numbers display up to three decimal places where applicable. Nonzero subsecond durations are labelled. Durations round to the nearest second; nonzero subsecond durations are labelled. File-size output units are decimal. Changing an input label does not convert filled values.

Example

Worked example: Pixels = 3000; PPI = 300; Print Size Unit = "inches". Result: 10 in.

Practical tip

Check the input labels and assumptions against the pixels to physical size task before reusing the number.