Why do I need to choose a gender?

In Russian the numerals 1 and 2 change form to agree with their noun: один/одна/одно for one and два/две for two. To spell a number correctly you must know the gender of the counted noun, so the tool asks you to pick it.

How does the thousands word change?

Тысяча follows the standard count-form rule: 1 takes тысяча (одна тысяча), 2 to 4 take тысячи (две тысячи), and 5 and above plus the teens take тысяч (пять тысяч). The tool applies this paucal rule automatically.

Why is одна тысяча feminine even for a masculine number?

The word тысяча is itself a feminine noun, so the unit before it always uses the feminine form одна тысяча and две тысячи, regardless of what the overall number counts. The tool handles this internal agreement separately from your chosen gender.

What is the largest number supported?

The tool covers numbers up to the billions, building groups of thousands, millions, and billions. Each scale word (миллион, миллиард) gets its own count-form ending depending on the leading digits of that group.

Is anything sent to a server?

No. The number-to-words logic is bundled into the page and runs in your browser. Nothing you type is uploaded, so figures from contracts or finance stay on your device.

Russian Number to Words

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

The Russian Number to Words tool spells whole numbers out in Russian, handling the two features that make this harder than in English: gender agreement on the small numerals and the count-form (paucal) endings on scale words like тысяча. Choose the gender of the noun your number will modify and the tool produces the grammatically correct spelling.

How it works

Three-digit groups. The number is split into groups of three from the right: units, thousands, millions, billions. Each group is converted with hundreds (сто, двести…), tens (двадцать, тридцать…), and units (один…девятнадцать).
Gender on the units. For 1 and 2 in a group, the form depends on context: the units group uses your chosen gender (один/одна/одно, два/две), while the thousands group always uses feminine (одна тысяча, две тысячи) because тысяча is a feminine noun.
Count-form endings. Each scale word takes the right ending based on its group’s last digits: 1 → тысяча/миллион, 2–4 → тысячи/миллиона, 0 or 5–20 → тысяч/миллионов. The teens (11–14) always take the plural-genitive form.

Tips and example

2025 with feminine gender gives две тысячи двадцать пять; the thousands stay feminine, while пять is gender-neutral.
21 differs by gender: masculine двадцать один, feminine двадцать одна, neuter двадцать одно.
Zero on its own is ноль; within a larger number empty groups are simply skipped, so 1000 is just одна тысяча, never одна тысяча ноль.