Pixel Converter

C Paper Sizes to Pixels

Convert ISO C-series paper sizes (C0 through C10) to pixel dimensions at any resolution. C4 is 866 × 1225px at 96 DPI.

All converters

96 DPI for screen, 150–300 for print.

C4 at 96 DPI

866 × 1225px

Formula

px = (mm ÷ 25.4) × DPI, per dimension (default DPI 96)

C series at 96 DPI

Every C-series size in pixels at the current resolution.

Sizemmpixels
C0917 × 12973466 × 4902
C1648 × 9172449 × 3466
C2458 × 6481731 × 2449
C3324 × 4581225 × 1731
C4229 × 324866 × 1225
C5162 × 229612 × 866
C6114 × 162431 × 612
C781 × 114306 × 431
C857 × 81215 × 306
C940 × 57151 × 215
C1028 × 40106 × 151

About the C Paper Sizes to Pixels conversion

The ISO 216 C series is used mainly for envelopes: a C-size envelope holds the matching A-size sheet unfolded. C4, for instance, fits an A4 sheet. C0 is 917 × 1297mm, with each size halving in area down to C10.

Pixel dimensions come from each millimetre value converted through inches at your DPI: px = (mm / 25.4) × DPI. At 96 DPI, C4 (229 × 324mm) is 866 × 1225px; at 300 DPI it is 2705 × 3827px.

Select a C size and resolution to get its exact pixel dimensions, with the full C-series table alongside — useful for designing envelope artwork and print templates.

Related converters

px to emem to pxpx to remrem to pxpx to ptpt to px

C Paper Sizes to Pixels FAQs

C4 is 229 × 324mm. At the 96 DPI screen reference that is 866 × 1225px; at 300 DPI it is 2705 × 3827px.
The C series is used for envelopes. A C-size envelope holds the matching A-size sheet — a C4 envelope fits an unfolded A4 sheet, and a C5 fits an A4 folded once.
Each millimetre dimension is divided by 25.4 to get inches, then multiplied by the DPI: px = (mm / 25.4) × DPI for width and height.
Use 300 DPI for print and 96 DPI for on-screen pixels. Match the DPI field to your intended output resolution.