Subscript Generator for Chemistry and Formulas

Subscript text sits below the normal baseline — the small numbers in H₂O, CO₂, and H₂SO₄ are subscripts. In rich-text editors like Word or Google Docs, you can apply subscript through a menu. In plain-text environments — Discord, Instagram, Twitter, Slack, Notion without formatting — there is no subscript button. That is where Unicode subscript characters come in. Our Subscript Generator converts normal characters into their Unicode subscript equivalents so you can paste them anywhere.

The Unicode Subscript Character Table

Unicode includes a dedicated block of subscript digits and a subset of subscript letters. Here are the subscript digits you will use most often:

Normal	Subscript	Unicode Point
0	₀	U+2080
1	₁	U+2081
2	₂	U+2082
3	₃	U+2083
4	₄	U+2084
5	₅	U+2085
6	₆	U+2086
7	₇	U+2087
8	₈	U+2088
9	₉	U+2089

Unicode also includes subscript letters for common chemistry and math notation: ₐ, ₑ, ₒ, ₓ, ₙ, ₘ, ₖ, ₜ, ᵢ, ᵣ, ᵤ, ᵥ. Coverage is not complete for all letters, which means some subscript expressions require the rich-text formatting approach in a document editor rather than Unicode characters.

Real Chemistry Formulas in Subscript

Here are common chemistry formulas written with Unicode subscript characters — ready to copy and paste into any plain-text field:

• Water: H₂O
• Carbon dioxide: CO₂
• Sulfuric acid: H₂SO₄
• Glucose: C₆H₁₂O₆
• Ammonia: NH₃
• Methane: CH₄
• Hydrogen peroxide: H₂O₂
• Ethanol: C₂H₅OH

These paste cleanly into Discord, WhatsApp, Twitter, and most social platforms. They also work in many note-taking apps including Notion and Obsidian.

Physics and Math Notation

Subscript is also common in physics for indexed variables. Standard examples: v₁ and v₂ for initial and final velocity, x₀ for initial position, aₙ for the nth term of a sequence, and Fᵢ for force components. In thermodynamics, Cp and Cv represent specific heat capacities at constant pressure and volume respectively. For these short notations, Unicode subscript works well in notes, chat, and social posts.

Where Subscript Works vs Where It Does Not

Unicode subscript renders correctly in most modern apps and browsers. It works well in: Discord, Instagram, Twitter/X, WhatsApp, Telegram, Notion, Obsidian, and most web browsers. It may not render correctly in: older SMS systems, some legacy email clients, plain ASCII environments, and certain code editors with strict font rendering.

The key limitation is font support. If the platform renders your text in a font that does not include the Unicode subscript block, you will see boxes or question marks instead of the subscript characters. Testing in the actual destination app before publishing is always worth doing.

Subscript vs Superscript: Which to Use

Subscript (below baseline) is used for: chemical formulas, indexed variables, particle notation. Superscript (above baseline) is used for: exponents, footnote markers, ordinals like 1st and 2nd. Both are available as Unicode character sets, and you can combine them in the same expression — for example, in chemistry, isotope notation uses both: ¹⁴C for carbon-14 uses superscript for the mass number. Use Subscript Generator for below-baseline notation and Superscript Generator for above-baseline notation.

Generating Subscript for Notes and Social Posts

Students and educators frequently paste chemistry formulas into social media posts, study group chats, and note-sharing apps. The ability to write H₂O or CO₂ correctly in a Discord message or a Notion note — rather than H2O or CO2 — matters for clarity and credibility. Our Subscript Generator converts the characters instantly. Type or paste the full formula, convert, and paste the result into any platform. The Unicode subscript characters travel with the text and render correctly on any device that supports modern Unicode, which includes all major operating systems and browsers in use today.