The Most Logical Number System You Will Ever Learn
Mandarin Chinese has one of the most elegant and logical number systems in the world. Once you learn the digits 0 through 10, you can construct any number up to 99 through simple combination. There are no irregular teens like English's "eleven" and "twelve," no unpredictable shifts like "twenty" instead of "two-ten." In Mandarin, 11 is literally "ten-one" and 20 is literally "two-ten."
Once you memorize the numbers 1 through 10, you can already count to 99. The system is purely mathematical: 25 is 二十五 (èr shí wǔ), literally "two-ten-five." No exceptions, no irregularities.
Numbers 0 Through 10
These ten digits plus zero are the building blocks for every number in Mandarin.
一二三四五六七八九十。
yī èr sān sì wǔ liù qī bā jiǔ shí.
One two three four five six seven eight nine ten.
零是一个很重要的数字。
líng shì yī gè hěn zhòngyào de shùzì.
Zero is a very important number.
Building Numbers 11 Through 99
The pattern is beautifully simple. For 11 through 19, say 十 (shí) followed by the ones digit. For multiples of ten, say the digit followed by 十. For everything else, combine both.
十一是我的幸运数字。
shíyī shì wǒ de xìngyùn shùzì.
Eleven is my lucky number.
他今年二十五岁。
tā jīnnián èrshíwǔ suì.
He is twenty-five years old this year.
Here is how it works: 十一 (shíyī, 11) is "ten-one." 十二 (shí'èr, 12) is "ten-two." Moving up, 二十 (èrshí, 20) is "two-ten." 二十一 (èrshíyī, 21) is "two-ten-one." 三十 (sānshí, 30) is "three-ten." 九十九 (jiǔshíjiǔ, 99) is "nine-ten-nine."
Hundreds, Thousands, and Beyond
Larger numbers follow the same logical pattern with a few new unit words.
- 百 (bǎi) — hundred
- 千 (qiān) — thousand
- 万 (wàn) — ten thousand
- 亿 (yì) — hundred million
我有三百块钱。
wǒ yǒu sānbǎi kuài qián.
I have three hundred yuan.
这个城市有两千万人。
zhège chéngshì yǒu liǎngqiān wàn rén.
This city has twenty million people.
Note that Chinese uses 万 (wàn, ten thousand) as a unit, which does not exist in English. So one million is 一百万 (yībǎi wàn, "one hundred ten-thousands"), and ten million is 一千万 (yīqiān wàn, "one thousand ten-thousands").
二 (èr) vs 两 (liǎng) — A Critical Distinction
Both 二 and 两 mean "two," but they are not interchangeable.
Use 二 (èr) for:
- Counting and sequences: 一、二、三 (one, two, three)
- Mathematics: 二加二等于四 (2 + 2 = 4)
- Floor numbers, phone numbers, ordinals: 第二 (second), 二楼 (second floor)
Use 两 (liǎng) for:
- Before measure words: 两个人 (two people), 两本书 (two books)
- Before 百 (hundred), 千 (thousand), 万 (ten thousand): 两百 (200), 两千 (2000)
我要两杯咖啡。
wǒ yào liǎng bēi kāfēi.
I want two cups of coffee.
他住在二楼。
tā zhù zài èr lóu.
He lives on the second floor.
Using 二 before a measure word is one of the most common beginner mistakes. Never say 二个人. Always say 两个人 (liǎng gè rén) when you mean "two people." Think of 二 as the digit and 两 as the quantity word.
Hand Gestures for Numbers 1 Through 10
Chinese culture has a unique set of one-handed gestures for counting 1 through 10. Numbers 1 through 5 use the same finger-counting you might expect, but 6 through 10 each have their own special hand shapes, all done with a single hand.
- 1-5: Extend one through five fingers (similar to many cultures)
- 6: Extend thumb and pinky, fold the middle three fingers
- 7: Touch all fingertips together in a point
- 8: Extend thumb and index finger in an "L" shape (like a gun gesture)
- 9: Hook the index finger with other fingers folded, thumb extended
- 10: Cross your index and middle finger, or make a fist
These hand gestures are essential at Chinese markets and restaurants, especially in noisy environments. The numbers 8 (八, bā) is considered extremely lucky because it sounds like 发 (fā, "to prosper"). The number 4 (四, sì) is considered unlucky because it sounds like 死 (sǐ, "death"). Many buildings in China skip the 4th floor, and phone numbers with multiple 8s sell for premium prices.
Introduction to Measure Words
In Mandarin, you cannot simply put a number directly before a noun. You must always insert a measure word (also called a classifier) between the number and the noun.
The pattern is: number + measure word + noun
我有三本书。
wǒ yǒu sān běn shū.
I have three books.
她买了五个苹果。
tā mǎi le wǔ gè píngguǒ.
She bought five apples.
Common Measure Words
Here are the most frequently used measure words to get you started:
- 个 (gè) — universal/general: people, objects, ideas
- 本 (běn) — books, magazines, notebooks
- 只 (zhī) — small animals, one of a pair (hands, ears)
- 件 (jiàn) — clothing items, matters, affairs
- 张 (zhāng) — flat things: paper, tables, tickets, beds, photos
- 杯 (bēi) — cups or glasses of liquid
- 瓶 (píng) — bottles of liquid
- 辆 (liàng) — vehicles
- 条 (tiáo) — long, thin things: roads, rivers, fish, pants
我要一杯水和两瓶啤酒。
wǒ yào yī bēi shuǐ hé liǎng píng píjiǔ.
I want one glass of water and two bottles of beer.
她有一辆红色的车。
tā yǒu yī liàng hóngsè de chē.
She has one red car.
When you do not know the correct measure word, use 个 (gè). It is the universal fallback, and Chinese speakers will understand you perfectly even if 个 is not the technically correct classifier. As you progress, you will naturally pick up more specific measure words.
Quick Reference Table
Numbers 0-10
| Number | Character | Pinyin |
|---|---|---|
| 0 | 零 | líng |
| 1 | 一 | yī |
| 2 | 二 / 两 | èr / liǎng |
| 3 | 三 | sān |
| 4 | 四 | sì |
| 5 | 五 | wǔ |
| 6 | 六 | liù |
| 7 | 七 | qī |
| 8 | 八 | bā |
| 9 | 九 | jiǔ |
| 10 | 十 | shí |
Large Number Units
| Unit | Character | Pinyin | Value |
|---|---|---|---|
| Hundred | 百 | bǎi | 100 |
| Thousand | 千 | qiān | 1,000 |
| Ten thousand | 万 | wàn | 10,000 |
| Hundred million | 亿 | yì | 100,000,000 |
Common Measure Words
| Measure Word | Pinyin | Used For | Example |
|---|---|---|---|
| 个 | gè | general / people | 一个人 (one person) |
| 本 | běn | books | 一本书 (one book) |
| 只 | zhī | small animals | 一只猫 (one cat) |
| 件 | jiàn | clothing / matters | 一件衣服 (one garment) |
| 张 | zhāng | flat things | 一张纸 (one sheet of paper) |
| 杯 | bēi | cups of liquid | 一杯茶 (one cup of tea) |
| 瓶 | píng | bottles | 一瓶水 (one bottle of water) |
| 辆 | liàng | vehicles | 一辆车 (one car) |
| 条 | tiáo | long thin things | 一条鱼 (one fish) |
Summary
Mandarin numbers are built on a foundation of pure logic:
- Learn 0-10 and you can build any number through simple combination
- No irregularities — 11 is "ten-one," 20 is "two-ten," 99 is "nine-ten-nine"
- 二 (èr) vs 两 (liǎng) — use 二 for counting and sequences, 两 before measure words and large units
- 万 (wàn, ten thousand) is a unique unit — one million is 一百万 (one hundred ten-thousands)
- Always use a measure word between a number and a noun — 个 (gè) is your safe default
- 8 is lucky, 4 is unlucky — cultural significance shapes daily life in China
