21 in Czech
Nearby Czech Numbers
21 in Other Languages
About 21 in Czech
When speaking Czech, 21 is expressed as dvacet jedna. The ordinal form — used for rankings, dates, and sequences — is dvacátý první jedenadvacátý.
In mathematics, 21 is odd. Knowing how to say 21 in Czech is useful in everyday situations such as prices, addresses, ages, dates, phone numbers, and telling the time.
Knowing 21 in Czech is more useful than it might seem. Numbers are woven into nearly every type of conversation, and fluency with them makes everything from shopping to socializing dramatically easier.
Learning Numbers in Czech
What makes Czech numbers challenging
Czech numbers are grammatically complex: they decline through seven cases, have gendered forms, and change the noun they modify in different ways depending on the number. Phone numbers are read as three-digit groups spoken as compound numbers (e.g., 608 = "šest set osm"), requiring you to understand hundreds at conversational speed. The consonant clusters (čtyři, tři) are difficult for non-Slavic speakers to distinguish.
Tips for learning Czech numbers
For everyday situations, focus on understanding numbers as they are spoken rather than producing grammatically perfect forms. Practice hearing three-digit numbers (100-999) since Czech phone numbers are grouped this way. Learn the sounds of čtyři (4) and tři (3) as distinct patterns. Start with digit-by-digit recognition, then graduate to the three-digit group style that native speakers use.