CSS Unit Converter

CSS units explained

px is an absolute pixel — it never scales. rem is relative to the root font-size (usually 16 px) — preferred for spacing and typography because it respects user browser zoom. emis relative to the current element's font-size (which makes it tricky in nested elements; at root level it equals rem). vw / vh are 1% of the viewport width / height — great for fluid layouts. pt is a print unit: 1pt = 96/72 px ≈ 1.333 px. For a deeper dive into unit-aware spacing, try the PX to REM Converter.