Luke 12:25 New English Translation

²⁵And which of you by worrying^[a] can add an hour to his life?^[b]

Luke 12:25 tn Or “by being anxious.”
Luke 12:25 tn Or “a cubit to his height.” A cubit (πῆχυς, pēchus) can measure length (normally about 45 cm or 18 inches) or time (a small unit, “hour” is usually used [BDAG 812 s.v.] although “day” has been suggested [L&N 67.151]). The term ἡλικία (hēlikia) is ambiguous in the same way as πῆχυς. Most scholars take the term ἡλικία (hēlikia) to describe age or length of life here, although a few refer it to bodily stature (see BDAG 435-36 s.v. 1.a for discussion). Worry about length of life seems a more natural figure than worry about height. However, the point either way is clear: Worrying adds nothing to life span or height.

New English Translation (NET)