Large format calculator
Poster Resolution Calculator
Calculate the pixel dimensions and approximate uncompressed file size for posters, signs and banners.
● Runs in your browser
INPUTChange any value
RESULTUpdates instantly
Required dimensions3600 × 5400 px
Resolution19.44 MP
Raw RGB size≈ 58.3 MBSaved JPEG/TIFF/PDF size will vary
How it works
A useful answer,
with the math visible.
Calculate the pixel dimensions and approximate uncompressed file size for posters, signs and banners. Adjust the fields above and the result updates immediately—there is no upload, account or hidden processing step.
FORMULAPixels = physical dimension × target PPI
Worked example
A 24 × 36 in poster at 150 PPI requires 3600 × 5400 px, or 19.44 megapixels.
Before you send the file
- Large-format work is often viewed farther away and may not require 300 PPI.
- The file-size estimate is uncompressed RGB data; saved files are usually smaller.
- Ask the printer for effective-resolution and maximum-file-size requirements.
Production note
RELATED FIELD GUIDE150 PPI vs 300 PPI for Posters and Large PrintsChoose a sensible poster resolution using print size, viewing distance, source quality and printer requirements instead of a universal 300 PPI rule.Read the guide ↗This calculator is a planning aid. Materials, equipment and supplier tolerances vary, so verify final specifications with the printer or carrier responsible for production.