dieciocho
“dieciocho” means “eighteen” in Spanish (the number 18).
eighteen
Also: eighteenth
📝 In Action
Tengo dieciocho años y mañana empiezo la universidad.
A1I am eighteen years old and tomorrow I start university.
El apartamento número dieciocho tiene un balcón muy bonito.
A1Apartment number eighteen has a very beautiful balcony.
La independencia se celebra el dieciocho de septiembre.
A2Independence is celebrated on the eighteenth of September.
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Quick Quiz: dieciocho
Question 1 of 3
How do you say 'I am 18 years old' correctly in Spanish?
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👥 Word Family▼
📚 Etymology▼
From the Latin 'decem' (ten) and 'octo' (eight), which evolved into the Old Spanish 'diez e ocho'.
First recorded: 13th century
Cognates (Related words)
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Frequently Asked Questions
Is it 'dieciocho' or 'diez y ocho'?
It is always written as 'dieciocho' (one word). While 'diez y ocho' was used in the past, the single-word version has been the standard for a long time.
Does 'dieciocho' change if I'm talking about a girl?
No. Unlike the number one (un/una) or hundreds (doscientos/doscientas), 'dieciocho' never changes its form.
How do I say '18th' as in 'the 18th floor'?
While 'dieciocho' is used for dates, for rank or order (like floors), the formal word is 'decimoctavo,' though many native speakers informally just say 'piso dieciocho'.