Enter the two page dimensions (It doesn't matter if the height or width comes first.) and click 'Calculate'.
Need your poster printed to a different specific required poster size?
It's easiest to just use your existing file as-is and print it to the largest possible size within the required size restrictions. However, if you must change the proportion of your PowerPoint page so it can be printed to a specific required poster size, use our Page Size Converter to help figure out what new page size to make your file.