What Are Numbers for Age?
Numbers are among the first and most fundamental building blocks of any language. In English, we use numbers to express age — how old a person is. This is a core skill. Essential. When you talk about your family, you almost always mention ages. Your mother is forty-five. Your little brother is seven. Your grandfather is seventy-two. Without numbers, these conversations are impossible.
At the A1 level, mastering age numbers opens up a wide range of everyday interactions. You can introduce your family members, answer the classic question How old are you?, and understand others when they share information about their loved ones. The structure is simple and consistent — once you grasp the pattern, you can express any age from one to one hundred with confidence.
Why Learn This?
By the end of this lesson, you will be able to:
- Say and understand numbers from 1 to 100 in English
- Ask someone their age using the correct question form
- Answer age questions about yourself and your family members
- Describe family members by combining their name, role, and age
- Understand ages when listening to English conversations
- Write ages correctly in English sentences
Essential Vocabulary
years old - the phrase used after a number to express someone's age (e.g., five years old)
How old - the question phrase used to ask about someone's age
age - how many years a person has lived
young - not old; describing a person of few years
old - having lived for many years
teenager - a person between 13 and 19 years old
adult - a fully grown person, usually 18 years or older
baby - a very young child, usually under one year old
birthday - the day each year that marks when someone was born
born - came into the world; the starting point of a person's age
Pronunciation Guide
thirteen - /ˌθɜːrˈtiːn/ - Stress on the SECOND syllable: thir-TEEN
thirty - /ˈθɜːr.ti/ - Stress on the FIRST syllable: THIR-ty
fourteen - /ˌfɔːrˈtiːn/ - Stress on the SECOND syllable: four-TEEN
forty - /ˈfɔːr.ti/ - Stress on the FIRST syllable: FOR-ty
fifteen - /ˌfɪfˈtiːn/ - Stress on the SECOND syllable: fif-TEEN
fifty - /ˈfɪf.ti/ - Stress on the FIRST syllable: FIF-ty
years old - /ˌjɪərz ˈoʊld/ - Both words are clearly pronounced; do not drop years
How old are you? - /ˌhaʊ ˈoʊld ər ˈjuː/ - Natural rhythm: stress on OLD and YOU
Grammar Structure
Rule 1 — Stating an age: Use to be + number + years old
Examples: I am twenty years old. She is eight years old. They are forty-five years old.
Rule 2 — Asking about age: Use How old + am/is/are + subject?
Examples: How old is your mother? How old are your brothers? How old am I?
Rule 3 — Short answer: You can drop years old in casual speech, but it is better to include it at A1 level. She is eight. is acceptable. She is eight years old. is more complete.
Important: Never say She has eight years. This is a direct translation from Turkish — it is incorrect in English. Always use to be, not to have.
When To Use
Introducing Family Members
- When you describe your family to a new friend or classmate
- When filling out a form that asks for a family member's age
- When writing a short paragraph about your family in class
Everyday Conversations
- When someone asks about your age directly
- When comparing ages among siblings or cousins
- When talking about a child's birthday or school year
Social and Formal Situations
- At the doctor's office: stating a child's age
- At school: telling a teacher how old your parents are on a form
- In a casual chat: asking a new friend how old their younger brother is
Example Sentences
- — I am twelve years old.
- — My mother is forty-three years old.
- — How old is your father?
- — He is fifty years old.
- — My little sister is five years old.
- — My grandfather is seventy-eight years old.
- — How old are you?
- — My brother and I are fifteen and seventeen years old.
- — The baby is one year old.
- — My parents are both forty years old. They are twins!
Mini Dialogues
Liam: — Do you have brothers or sisters?
Sofia: — Yes, I have one brother. His name is Marco.
Liam: — How old is he?
Sofia: — He is nine years old. He is very young!
Liam: — My sister is nine too. How funny!
Emma: — This is my family. This is my dad. He is forty-four years old.
Friend: — And who is this woman?
Emma: — That is my mom. She is forty-one years old.
Friend: — How old is the baby?
Emma: — He is two years old. His name is Ben.
Friend: — What a lovely family!
Teacher: — Hello, everyone. Today, tell me about your grandparents. How old are they?
Carlos: — My grandfather is sixty-eight years old.
Teacher: — Great! And your grandmother?
Carlos: — She is sixty-five years old.
Teacher: — Excellent, Carlos. Perfect sentences!
Correct vs. Incorrect Usage
Practical Tips
- The -teen vs. -ty trick: Numbers ending in -teen (thirteen, fourteen) are stressed on the LAST syllable. Numbers ending in -ty (thirty, forty) are stressed on the FIRST syllable. Listen carefully — the stress changes the meaning completely.
- Always use to be: In English, age uses the verb be. Not have. Never have. Repeat this rule until it becomes automatic.
- Practice with real people: Think of five family members right now. Write their ages in English. Say them aloud. Repetition builds fluency fast.
- Hyphenate compound numbers: Numbers from 21 to 99 (except round tens) use a hyphen. Write twenty-three, not twenty three. Small detail. Big difference in writing.
- Use years old fully at first: As a beginner, always say the complete phrase — She is eight years old — rather than just She is eight. It sounds more natural and complete.
- Asking age politely: With adults, especially older people, it can feel rude to ask How old are you? directly. In casual situations with friends and children, it is perfectly fine. Context matters.
Alternative Expressions
Other Ways to Ask About Age:
Other Ways to State an Age:
Describing Age Groups:
Cultural Notes
Asking Adults Their Age: In many English-speaking cultures, especially in the United Kingdom and United States, asking an adult — particularly a woman — how old she is can be considered impolite. It is perfectly acceptable with children and young people. With adults you do not know well, it is safer to avoid the question unless they bring it up first.
Age and Identity: In English-speaking societies, age is not always the central focus of social identity the way it might be in some other cultures. People do not automatically adjust their language or behavior based on whether someone is older or younger. English has no formal you equivalent to Turkish siz or Japanese keigo — the same you is used for everyone.
Birthdays and Celebration: Birthdays are widely celebrated in English-speaking countries. It is very common to say Happy Birthday! and ask How old are you today? on someone's birthday. This is warm and friendly, not rude. Children especially love talking about their age on their birthday — it is a proud moment for them.