Why does Czech change the words for one and two?

Czech numerals one and two agree in gender with the noun they count. One is jeden (masculine), jedna (feminine), or jedno (neuter); two is dva (masculine) or dvě (feminine and neuter).

How are teens and tens formed?

Teens use special forms such as jedenáct, dvanáct, and třináct. Tens are dvacet, třicet, čtyřicet and so on, with units joined directly, as in dvacet jedna.

How does Czech handle thousands and millions?

Czech uses tisíc with its plural forms (dva tisíce, pět tisíc) and milion (dva miliony, pět milionů). The tool selects the right plural form based on the leading count.

Can it spell negative numbers and zero?

Yes. Zero becomes nula, and a negative number is prefixed with mínus, for example mínus padesát sedm.

Is the conversion done locally?

Yes. The number-to-words logic runs entirely in your browser, so the numbers you enter are never sent anywhere.

Czech Number to Words

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This tool spells whole numbers in Czech, getting the tricky gender agreement right. In Czech the numerals for one and two change form depending on the gender of the noun they count, so the tool lets you choose masculine, feminine, or neuter and produces jeden/jedna/jedno and dva/dvě accordingly.

How it works

The converter builds each number from named building blocks:

Units: nula, jeden/jedna/jedno, dva/dvě, tři, čtyři … devět
Teens: deset, jedenáct, dvanáct, třináct … devatenáct
Tens: dvacet, třicet, čtyřicet … devadesát
Hundreds: sto, dvě stě, tři sta … devět set
Thousands: tisíc with plurals dva tisíce, pět tisíc
Millions: milion, dva miliony, pět milionů

Only the leading one and two take the gender you select; numbers inside larger groups (for example the hundreds count or the thousands count) use the standard counting forms. The right plural of tisíc and milion is chosen from the count that precedes it: 2 to 4 take tisíce/miliony, while 5 and above take tisíc/milionů.

Example

For 1234 with neuter gender, the tool returns jeden tisíc dvě stě třicet čtyři. Choosing feminine for the value 2 yields dvě, while masculine yields dva. The number 0 becomes nula, and -57 becomes mínus padesát sedm.