How to Use:
Enter your original size, then change the target width, height, or scale. Add a border if needed. The calculator keeps proportions and shows final paper size, 300 DPI dimensions, and standard-size matches. ↺ Reset starts over.
Proportion & Print Specs Engine
4:5 Aspect Ratio
×
=
%
in
Final Outside Paper / Frame Size
16 × 20 in
Custom Paper Size
