Δ
Capital Delta in Mathematics
In Mathematics, the Capital Delta symbol (Δ) is commonly used. Learn how to copy and use it in your technical documents.
Unicode
U+0394
HTML Entity
Δ
LaTeX Sequence
\capitaldelta
Primary Field
MathematicsMathematics Application
Capital Delta means a finite change or difference in a quantity — Δx is a change in position, Δt a change in time, ΔE a change in energy. It also denotes the discriminant of a quadratic and, in some fields, the Laplace operator.
How to type Delta (capital) (Δ)
- Fastest: click Δ on the keyboard above — it copies to your clipboard, ready to paste into Word, Google Docs, email or a forum.
- Unicode: the code point is shown in the panel above; on Windows you can also use Alt‑X after the hex code in Word.
- LaTeX: use the command shown above inside math mode.
- Anywhere: because it’s standard Unicode, it keeps its exact form across apps and devices.
Frequently asked questions
What does Δ mean?
‘Change in’ — the difference between a final and initial value, e.g. Δx = x₂ − x₁.
Is Δ used in chemistry?
Yes — Δ over a reaction arrow indicates that heat is applied.
Write mathematical and scientific expressions
Need to pair this symbol with other operators?