二 and 两 in Chinese: How to Say “Two” Correctly
The difference is not too difficult once you understand the main rule: 二 is used when counting or in numbers, while 两 is used when talking about the quantity of objects, people, or time.
Let’s look at this in more detail with simple examples.
1. 二 èr — when we simply count
二 èr is used when we name the number “two” by itself or count in order.
For example:
一，二，三，四
yī, èr, sān, sì
one, two, three, four
二加二等于四
èr jiā èr děngyú sì
two plus two equals four
Here, 二 is simply a digit or a number.
2. 二 is used in numbers and labels
When we say a phone number, room number, bus number, page number, or house number, we usually use 二, because we are naming the digit.
Examples:
二号
èr hào
number two / the second day of the month
二楼
èr lóu
the second floor
二零二六年
èr líng èr liù nián
the year 2026
我的电话号码是……二……
wǒ de diànhuà hàomǎ shì... èr...
my phone number is ...2...
Important: in phone numbers, the digit 2 is often read as 二 èr. In spoken Chinese, 两 liǎng may also sometimes be used to avoid confusing 二 èr with 一 yī, but the basic option is 二.
3. 两 liǎng — when counting objects, people, and animals
If “two” is followed by a measure word, 两 liǎng is usually used.
The structure is:
两 + measure word + noun
Examples:
两个人
liǎng gè rén
two people
两本书
liǎng běn shū
two books
两只猫
liǎng zhī māo
two cats
两杯咖啡
liǎng bēi kāfēi
two cups of coffee
Saying 二个人 or 二本书 sounds unnatural. In these cases, you need 两.
4. 两 is used with time
When we talk about an amount of time, 两 is also usually used.
Examples:
两天
liǎng tiān
two days
两个星期
liǎng gè xīngqī
two weeks
两个月
liǎng gè yuè
two months
两年
liǎng nián
two years
我在中国住了两年。
wǒ zài Zhōngguó zhù le liǎng nián
I lived in China for two years.
5. 两 is used with money and measurements
When we talk about amounts of money, weight, distance, or volume, 两 is often used.
Examples:
两块钱
liǎng kuài qián
two yuan
两公斤
liǎng gōngjīn
two kilograms
两米
liǎng mǐ
two meters
两杯水
liǎng bēi shuǐ
two glasses of water
Here, we are not simply naming the digit “2”; we are talking about a quantity, so we use 两.
6. 二 is used in ordinal numbers
If you need to say “second,” Chinese uses the structure 第 + number. Here, we use 二.
Examples:
第二课
dì èr kè
the second lesson
第二天
dì èr tiān
the second day
第二个问题
dì èr ge wèntí
the second question
Notice: even if there is a measure word after it, after 第 we usually use 二, not 两.
Correct:
第二个人
dì èr ge rén
the second person
Do not say:
第两个人
7. How do we say “twenty-two”?
In numbers above ten, 二 is usually used when we name the number itself.
Examples:
二十二
èrshí’èr
twenty-two
二百二十
èr bǎi èr shí
two hundred and twenty
二十二个学生
èrshí’èr ge xuésheng
twenty-two students
But if the number starts with “two hundred,” “two thousand,” or “two weeks,” 两 is often used.
Examples:
两百
liǎng bǎi
two hundred
两千
liǎng qiān
two thousand
两万
liǎng wàn
twenty thousand
You may also come across 二百, but in everyday speech 两百 sounds very natural.
8. Common mistakes
Mistake 1. Using 二 before a measure word
Incorrect:
二个学生
Correct:
两个学生
liǎng gè xuésheng
two students
Mistake 2. Using 两 in ordinal numbers
Incorrect:
第两课
Correct:
第二课
dì èr kè
the second lesson
Mistake 3. Using 两 when simply counting
Incorrect:
一，两，三
Correct:
一，二，三
yī, èr, sān
one, two, three
Key takeaway
Both 二 and 两 mean “two,” but they are used in different situations.
If we are simply naming the digit, counting in order, or saying “second,” we use 二.
If we are talking about the quantity of objects, people, time, money, or measurements, we usually use 两.
The main beginner-friendly rule is: before a measure word, almost always use 两.