Delta

Meaning and uses

Δ is the capital of delta, the fourth letter of the Greek alphabet. Science uses it for change: ΔT is a change in temperature, Δx a change in position and ΔH, in chemistry, a change in enthalpy, while lower-case δ often marks a very small change. The increment sign ∆ in the maths block is almost identical and is what Option+J types on a Mac; to get this Greek letter in Word, type 0394 and press Alt+X. Either reads as delta, so match whichever your document already uses.

Unicode details

Tap a code to copy it:

How to type Δ

• Mac: Fn+E opens the Character Viewer; search “greek capital letter delta”.
• Word: 0394, then Alt+X.
• Excel and Google Sheets: =UNICHAR(916).
• Phone: copy it from this page.
• Linux (GNOME): Ctrl+Shift+U, then 0394, then Space.
• HTML: Δ. CSS content: "\0394".