The macron — a straight line over a vowel, like the one in Ā — is one of the most widely used diacritics in the world, and also one of the least understood outside the languages that use it. It shows up in Mandarin Pinyin, Māori, Hawaiian, Latvian, and Japanese romanization, and it means something slightly different in each one.
This guide covers what the macron actually does, how to type Ā (and its lowercase ā) on Windows, Mac, and mobile, and where you’ll actually encounter it.
What Does the Macron Mean?
Unlike an accent that changes stress or an umlaut that changes vowel quality, the macron most often marks vowel length — it tells you to hold the sound longer than an unmarked vowel. But its exact job depends on the language:
In Mandarin Pinyin, the macron marks first tone — a flat, high pitch. Mā (妈, “mother”) is said with a level tone; without the mark, ma alone doesn’t tell you which of Mandarin’s four tones to use. Pinyin actually uses the macron across all five vowels — ā ē ī ō ū — one for each of the language’s tone-1 sounds.
In Māori and Hawaiian, the macron (called a tohutō in Māori, kahakō in Hawaiian) marks a long vowel sound, and it’s not optional decoration — it changes meaning. In Māori, keke means “cake,” but kēkē means “armpit.” Hawaiian place names carry macrons constantly: Hawaiʻi’s Lānaʻi, or the word kāne (“man”).
In Latvian and Lithuanian, the macron marks long vowels the same way, distinguishing words that would otherwise look identical.
In Japanese romanization (Hepburn-style rōmaji), macrons show long vowel sounds that Japanese writing marks differently — Tōkyō is more accurate than Tokyo, and ōsama (“king”) is a different word from osama without the mark.
In classical scholarship, macrons mark long vowels in Latin and Ancient Greek transliteration — you’ll see them in dictionaries and academic texts.
How to Type Ā on Windows
Alt Code (most reliable):
| Character | Code |
|---|---|
| ā (lowercase) | Alt + 0257 |
| Ā (uppercase) | Alt + 0256 |
Hold Alt, type the code on your numeric keypad, release. Num Lock must be on.
US International Keyboard:
If you’ve set up the US International layout (see our full guide), macrons aren’t included by default — this is one gap where Alt codes remain the more reliable Windows method.
Word/Google Docs AutoCorrect:
Set up a text replacement (e.g., ;a- → ā) in Word’s AutoCorrect settings or Google Docs’ Substitutions — this is worth doing if you type Pinyin or Māori regularly, since it saves you from Alt codes entirely.
How to Type Ā on Mac
The Mac has a genuinely fast built-in method for this one:
Press and hold:
- Hold down the A key
- A popup appears above it showing accent options: à á â ä æ ã å ā
- Press the number under ā, or click it
Option key shortcut:
Unlike acute or grave accents, the macron doesn’t have a dedicated Option combination — press-and-hold is your fastest built-in method on Mac.
Character Viewer (for uppercase or backup):
Press Control + Command + Space, search “a macron” or “a with macron,” and double-click to insert either case.
How to Type Ā on Mobile
iPhone and Android (press and hold):
- Hold down the a key
- Slide to select ā from the popup row
- Release to insert
This works identically to how é or ñ appear on mobile — the macron is just one more option in the same popup.
⚙️ Need ā, ē, ī, ō, or ū fast? Our Accent Character Finder shows the shortcut for any character instantly.
Typing Pinyin Tone Marks (All Five Vowels)
If you’re typing Pinyin regularly, you’ll need all four tone marks across all five vowels, not just the macron. Here’s the full first-tone set for reference, since ā is rarely typed alone:
| Vowel | First tone (macron) |
|---|---|
| a | ā |
| e | ē |
| i | ī |
| o | ō |
| u | ū |
For second, third, and fourth tones (á, ǎ, à and their equivalents), a dedicated Pinyin input method — built into both Windows and Mac — is far faster than hunting for each mark individually. Both operating systems let you add a Chinese (Pinyin) input source in your keyboard settings, which types tone marks automatically as you select characters.
Frequently Asked Questions
Is the macron the same as a straight accent?
No — visually a macron (ā) is a straight horizontal line, while an acute accent (á) slants upward. They mark different things: length/tone versus stress, depending on the language.
Why do some Hawaiian words look fine without the macron?
They may be different words. Dropping the kahakō can change meaning entirely, similar to how dropping the tilde in Spanish turns año (year) into ano (something else entirely). When precision matters — place names, formal writing — include it.
Does Word or Google Docs autocorrect this automatically?
Not by default — you’d need to add a custom AutoCorrect entry, covered in our full Google Docs and Microsoft Word accent guides.
Is there a faster way if I type Pinyin constantly?
Yes — install a Pinyin input method (built into Windows and Mac keyboard settings) rather than typing tone marks character by character. It’s designed for exactly this and will be dramatically faster than any shortcut list.
The Bottom Line
The macron is a small line that does a lot of work — marking tone in Pinyin, vowel length in Māori and Hawaiian, and long vowels in Latvian and Japanese romanization. Whether you need it occasionally or constantly, Mac’s press-and-hold and Windows’ Alt codes have you covered — and if Pinyin is a regular part of your typing, a dedicated input method will save you far more time than any shortcut.