Does A4 have one fixed pixel size?

No. A4 has a fixed physical trim size of 210 × 297 mm. Its pixel dimensions depend on the selected PPI.

Why is A4 2480 × 3508 pixels at 300 PPI?

Each millimetre value is divided by 25.4 to convert it to inches, multiplied by 300, then rounded to the nearest whole pixel.

Are the listed dimensions trim size or bleed size?

They are final trim dimensions. Bleed is printer-specific and must be added separately to the artwork canvas.

Interactive browser tool

Calculate Any Paper Size in Pixels

Choose an ISO, US or photo format and calculate its pixel dimensions at any PPI, in portrait or landscape orientation.

Quick answer

Choose the physical preset, orientation and PPI. The calculator converts the stored ISO, US or photo dimensions from millimetres to inches, multiplies by PPI and rounds the final pixel count once.

pixels = millimetres ÷ 25.4 × PPI

Interactive calculator

pixels = millimetres ÷ 25.4 × PPI

Paper preset → pixel dimensions

Example values are pre-filled. Results always reflect the values currently shown; replace them with your own measurements before using the result.

Print preset

Target PPI

PPI

Quick targets

Calculated resultsUpdates as you change the inputs

A4 pixel dimensionsPrimary result

2480 × 3508 px

Trim sizeResult

210 × 297 mm

Trim size in inchesResult

8.27 × 11.69 in

A4 at common targets

Target	Width	Height
150 PPI	1240 px	1754 px
240 PPI	1984 px	2806 px
300 PPI	2480 px	3508 px

When to use this tool

Use it for a specific print decision.

Use it when starting a document for a known ISO, US or photo format and the design software asks for raster width and height.
Use it to compare portrait and landscape requirements without manually converting millimetres to inches.
Use it when a tutorial quotes one fixed pixel size for A4 or Letter and you need to recalculate it for the printer's actual PPI.

How to use it

A result you can reproduce.

Choose a physical paper or photo preset.
Set portrait or landscape orientation.
Choose a PPI and copy the required pixel dimensions.

Every result is calculated in the page from the displayed inputs. Your printer's written production specification remains the final authority.

Worked example · quick scenario

See the basic numbers in context.

A4 is 210 × 297 mm, which rounds to 2480 × 3508 px at 300 PPI and 1240 × 1754 px at 150 PPI.

Open the A4 size reference →

Worked calculation

Follow the arithmetic from input to decision.

Inputs

Paper: A3
Physical size: 297 × 420 mm
Target: 240 PPI

Calculation

297 ÷ 25.4 × 240 = 2806.30 px.
420 ÷ 25.4 × 240 = 3968.50 px.
Round the final dimensions to 2806 × 3969 px.

An A3 trim canvas at 240 PPI is 2806 × 3969 px in portrait orientation.

Assumptions

What must be true for this calculation to apply.

The preset dimensions represent physical trim size.
Orientation changes edge order but not the format itself.
Metric conversion uses 25.4 mm per inch before multiplying by PPI.

From calculation to production

Verify the Paper size in pixels result with your real file.

Choose the physical preset, orientation and PPI. The calculator converts the stored ISO, US or photo dimensions from millimetres to inches, multiplies by PPI and rounds the final pixel count once. Then compare the result with the print provider's written specification.

Check an image →