≈ ≈Almost equal

To produce an almost equal/approximately equal sign:

Windows

Alt 2248 (using the numerical keyboard, with Num lock on)

Ubuntu

Ctrl ⇧ Shift u 2248 ⏎ Return (or Space)

Unicode

U+2248

HTML

≈ · ≈ · ≈

LaTeX

\approx

Similar characters: ≃ · ≅ · ≊ · ⭈ · ≉

Japanese variant: ≒