полтора/полторы

Полтора and Полторы

Level 4Sounds Like poltora/poltory

полтора (masc/neut) / полторы (fem) = 1.5. It has only two case forms: one for Nom/Acc and one for all other cases (полутора).

How It Works

The numeral полтора simplifies the six-case system into two groups. Note that the stress shifts from the final syllable in the nominative to the second syllable in oblique forms.

Etymology Tip: The word полтора comes from Old Russian пол-втора, meaning 'half of the second' (one whole plus half of the next).

1. Nominative and Accusative

  • полтора + Masculine/Neuter noun in Genitive Singular. Example: полтора часа (an hour and a half).
  • полторы + Feminine noun in Genitive Singular. Example: полторы минуты (a minute and a half).

Animacy Note: Unlike numbers 2, 3, and 4, полтора does not have a special animate Accusative form. The numeral remains in the Nominative/Accusative form, while the noun takes the Genitive case (Singular for standard nouns, Plural for plural-only nouns) regardless of animacy. Example: Я вижу полтора землекопа (I see one and a half diggers). Note that fractional numerals logically cannot combine with animate nouns, but native speakers frequently use them for humorous or idiomatic effect.

Pronunciation Note: Some nouns have a special counting form stress in the Genitive Singular, such as полтора часа (an hour and a half).

Plural-only nouns: In the Nominative and Accusative cases, using these forms with plural-only nouns (pluralia tantum) like полтора суток is grammatically awkward and generally avoided by native speakers. Instead, it is better to use descriptive workarounds like полтора дня (a day and a half) or день с половиной (a day and a half). However, in oblique cases, using полутора with plural-only nouns is perfectly grammatical: около полутора суток (around a day and a half).

2. Adjectives with Nominative and Accusative
When an adjective is placed between the numeral and the noun, both the Genitive Plural and Nominative Plural forms of the adjective are acceptable for all genders. However, speakers often carry over the habits used for the numbers 2, 3, and 4 (preferring Genitive Plural for masculine/neuter and Nominative Plural for feminine). Examples: полтора трудных / трудные года (one and a half difficult years), полторы полных / полные минуты (one and a half full minutes).

3. Oblique Cases (Genitive, Dative, Instrumental, Prepositional)
The gender distinction disappears. Use полутора for all genders, followed by the noun in the Plural matching the case. Any adjectives simply agree with the noun in the plural case. Note that in oblique cases, the noun reverts to its standard plural stress (e.g., около полутора часов, not with the singular counting stress).

  • Genitive: около полутора часов (around an hour and a half), около полутора трудных лет (around one and a half difficult years)
  • Dative: к полутора месяцам (by one and a half months)
  • Instrumental: с полутора рублями (with one and a half rubles)
  • Prepositional: в полутора километрах (in one and a half kilometers)

4. Verb Agreement
When a phrase with полтора/полторы is the subject of a sentence, the verb typically takes the neuter singular form in the past tense. Example: Прошло полтора часа (An hour and a half passed).

5. Related Forms
The numeral полтораста (150) has two forms: полтораста in the Nominative/Accusative and полутораста in all other cases. However, unlike полтора, полтораста requires the noun to be in the Genitive Plural in the Nominative and Accusative cases. Example: полтораста часов (150 hours).

Examples (4)

  1. Прошло полтора года с нашей последней встречи.

    One and a half years have passed since our last meeting.

    Word by Word: Passed one-and-a-half year from our last meeting.

    'Год' is masculine, so we use 'полтора' followed by the genitive singular 'года'.

  2. Мы ждали ответа полторы недели.

    We waited one and a half weeks for an answer.

    Word by Word: We waited answer one-and-a-half week.

    'Неделя' is feminine, so we use 'полторы' followed by the genitive singular 'недели'.

  3. Деревня находится в полутора километрах отсюда.

    The village is located one and a half kilometers from here.

    Word by Word: Village finds-itself in one-and-a-half kilometers from-here.

    In the prepositional case, we use 'полутора' and the noun 'километр' moves to the prepositional plural 'километрах'.

  4. У меня осталось меньше полутора литров воды.

    I have less than one and a half liters of water left.

    Word by Word: At me remained less one-and-a-half liters water.

    After 'меньше' (less than), we need the genitive case. We use 'полутора' and the genitive plural 'литров'.

Common Mistakes

  • Thinking 'полтора суток' is wrong.

    Different Meaningполтора суток
    полтора дня

    'Полтора суток' is standard Russian: with plural-only nouns, полтора takes the genitive plural, so a day and a half of 24-hour days is 'полтора суток'. 'Полтора дня' is another natural way to say a day and a half.

  • Using the plural noun in the Nominative case.

    полтора часов
    полтора часа

    In the Nominative/Accusative, полтора follows the same rule as 2, 3, and 4: it requires the Genitive Singular, not the plural.

  • Adding plural endings to the numeral in oblique cases.

    в полуторах километрах
    в полутора километрах

    The form полутора is fixed for all oblique cases; it does not take additional endings like -ах or -ами.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

полтора/полторыLevel 4Полтора and Полторы

Learn This First

To learn 'полтора' and 'полторы', a learner must first understand how Russian numerals govern noun cases. Specifically, this pattern mimics the behavior of 'два/три/четыре', which require the genitive singular. Additionally, the learner must be able to distinguish between masculine/neuter and feminine nouns to choose the correct form of the numeral.

Words in This Pattern

полтора