exa-

See also: exa and EXA

English

Etymology

From Ancient Greek ἕξ (héx, “six”), for the sixth order of 10³, analogous to tera-.

Prefix

SI prefix

E	Previous:	peta-
	Next:	zetta-

exa-

2. In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10¹⁸ (a short scale quintillion or long scale trillion).

   Alternative form: E- (symbol)

Antonyms

• atto-

Derived terms

English terms prefixed with exa-

exabit

exabyte

exaflop

exagram

exagramme

exahertz

exajoule

exakatal

exalitre

exametre

exanewton

exaop

exaparsec

exascale

exasecond

exaton

• exbi-

Translations

SI prefix

• Bulgarian: екса- (eksa-)
• Chinese:

  Cantonese: 艾- (yue) (ngaai⁶)

  Mandarin: 艾- (zh) (ài-), 艾可薩- / 艾可萨- (zh) (àikěsà-) (mainland China)

• Czech: exa- (cs)
• Dutch: exa- (nl)
• Esperanto: eksa-
• Finnish: eksa- (fi)
• French: exa- (fr)
• Galician: exa- (gl)
• German: exa- (de)
• Greek: εξα- (exa-)
• Hungarian: exa- (hu)
• Indonesian: eksa-
• Japanese: エクサ (ja) (ekusa)
• Korean: 엑사- (eksa-)
• Malay: eksa-
• Polish: eksa-
• Portuguese: exa- (pt)
• Russian: экза- (ekza-), экса- (ru) (eksa-)
• Spanish: exa- (es)
• Thai: เอกซะ- (èek-sà)
• Vietnamese: ê-xa

Anagrams

• Axe, axe

Czech

Pronunciation

• IPA^(key): [ɛɡza ]

Prefix

exa-

1. exa- (10¹⁸)

   ‎exa- + ‎joule → ‎exajoule

Derived terms

Czech terms prefixed with exa-

exabajt

exabyte

exajoule

Dutch

Pronunciation

• Audio:

  (file)

Prefix

exa-

1. exa-

Derived terms

Category Dutch terms prefixed with exa- not found

French

Pronunciation

• IPA^(key): /ɛɡ.za/

• Audio (France (Vosges)):

  (file)

Prefix

exa-

1. exa-

Derived terms

French terms prefixed with exa-

exaoctet

Portuguese

Prefix

exa-

1. exa- (SI prefix multiplying the unit by 10¹⁸)

Further reading

• “exa-”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Spanish

Etymology

Borrowed from English exa-, from Ancient Greek ἕξ (héx, “six”), for the sixth order of 10³, analogous to peta- and tera-.

Prefix

exa-

1. exa- (SI prefix multiplying the unit by 10¹⁸)

Further reading

• “exa-”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025