Pica to Em Converter

Both equal 12 points at the print standard. 1 pica is defined as 12 pt; 1 em at 12pt base = 12 pt. So they're exactly equivalent at the default.

Yes, at 12pt baseline. If your InDesign has 3 picas spacing, use 3 em in CSS. But verify your web design's base font (may be 16px, not 12pt).

Yes. This 1:1 relationship only holds at 12pt (print standard). If your web design uses 16pt base, then 1 pica ≠ 1 em anymore. Always check your design system's baseline.

Picas are fixed (always 12pt); ems are relative (scale with font size). In print, they're equivalent. In web, use ems for responsiveness—they automatically scale on mobile.