Methods
Every result traces to a formula.
Size, pixels, DPI, and bleed. Not a printer template replacement.
Units
1 inch = 25.4 mm. Pixels = mm ÷ 25.4 × DPI, rounded.
Assumptions
Presets say standard vs reference; recheck vendor rules.
Local
Browser math. DPI check reads local pixels—no upload, no account.
Limits
No judgment of color, ICC, focus, or process quality. Proof before production.