How to Write and Read Big Numbers in English —Step-by-Step?

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Daily English speaking practice

Need to know how to write big numbers in English so to become fluent on them? You’re on the right place. Big numbers follow a simple structure:

Millions + thousands + hundreds + tens + ones

Once you learn this pattern, you can read and write any number — even into the millions. Note, like we did with the previous post, the English numbers here appear with Portuguese translation.

Part 2: Big Numbers

LESSON 1: Big Numbers (Thousand → Billion).— PT “Números Maiores (1.000 → 1.000.000.000)”


1. Thousands — Milhares

EnglishPortuguês
1,000 = one thousand1.000 = mil
2,000 = two thousand2.000 = dois mil
5,000 = five thousand5.000 = cinco mil
10,000 = ten thousand10.000 = dez mil
20,000 = twenty thousand20.000 = vinte mil
50,000 = fifty thousand50.000 = cinquenta mil
100,000 = one hundred thousand100.000 = cem mil

2. Numbers between the Thousands. — PT “Números entre os Milhares”

To write big numbers use this pattern: thousands + hundreds + tens + ones PT Para escrever números maiores, use este padrão: “milhares + centenas + dezenas + unidades”

EnglishPortuguês
1,234 = one thousand two hundred thirty four1.234 = mil duzentos e trinta e quatro
3,506 = three thousand five hundred six3.506 = três mil quinhentos e seis
7,890 = seven thousand eight hundred ninety7.890 = sete mil oitocentos e noventa
12,345 = twelve thousand three hundred forty five12.345 = doze mil trezentos e quarenta e cinco
99,999 = ninety nine thousand nine hundred ninety nine99.999 = noventa e nove mil novecentos e noventa e nove

3. Hundreds of thousands. — PT “Centenas de milhares”

EnglishPortuguês
100,000 = one hundred thousand100.000 = cem mil
200,000 = two hundred thousand200.000 = duzentos mil
500,000 = five hundred thousand500.000 = quinhentos mil
900,000 = nine hundred thousand900.000 = novecentos mil

4. One million. — PT “Um milhão”

EnglishPortuguês
1,000,000 = one million1.000.000 = um milhão

This is the next big number after 999,999. — PT “Este é o próximo grande número depois de 999.999.”

Lesson 2: Spelling Rules for Big Numbers in English. —PT “Regras de Ortografia para Números Maiores”


1. Use hyphen for 21–99. — PT “ Regra 1: Use hífens para 21–99”.

EnglishPortuguês
Twenty-onevinte e um
Thirty-sixtrinta e seis
Eighty-nineoitenta e nove

2. No hyphens for hundreds or thousands. — PT “Regra 2: Sem hífens para centenas ou milhares”

EnglishPortuguês
Correct: one hundred twentyCento e vinte
Correct: five thousand six hundredCinco mill e seiscento

3. The use of “and” is optional. — PT “Regra 3: O uso de “And” é opcional”

— American English: One hundred twenty five

— British style: One hundred and twenty five


4. No “s” in plural. — PT “Regra 4: Sem s no plural”

IncorretCorret
❌ five hundreds✅ five hundred
❌ two thousands✅ two thousand

Exception: hundreds meaning “centenas” in portuguese.

 “Hundreds of people were around” —PR “centenas de pessoas estavam por perto.”

The same can be applied for“Tens”. Exemple: tens of people → dezenas de pessoas


These 4 rules partly help write English numbers correctly.

Lesson 3: Big Numbers in Real Life — How to Use Them? — PR “Números Maiores na Vida Real” Como usá-los passo a passo.

Age → Idade

“She is one hundred two years old.” — PT “Ela tem cento e dois anos de idade.”

Money →Dinheiro

“This phone costs three hundred fifty dollars.” — PT ““Este telefone custa trezentos e cinquenta dólares.”

Population →População

“My town has fifty thousand people.” — PT “A minha cidade tem cinquenta mil habitantes.”

Distance →Distância

“The city is one hundred twenty kilometers away. — PT ““A cidade fica a cento e vinte quilômetros de distância.”

Work →Trabalho

We need three thousandcopies. — PT “Precisamos de três mil cópias.”

Time → Tempo

The video has one million views. — PT “O vídeo tem um milhão de visualizações.”


Lesson 4: How to Write Numbers in Words and Digits in English from Thousand to Billion?

Practice Exercises:


Before we go father with big numbers, let’s review the basic ones (1 to 1000 ) by doing the following three tasks:

A. In your notebook, write the numbers in words — PT “Escreva os números por extensor no seu bloco de notas

DigitsWords
421 
708 
9,500 
23,000 
100,000 

B. Write the numbers in digits. — PT “Escreva os números em algarismos”

WordsDigitsPortuguês
four hundred twenty one quatrocentos e vinte e um
seven hundred eight setecentos e oito
nine thousand five hundred nove mil e quinhentos
twenty three thousand vinte e três mil
one hundred thousand cem mil

C. Choose the correct answer. — PT “Escolha a resposta correta.”

QuestionCorrect Answer
40,000 = (forty thousand / fourty thousand)forty thousand
125 = (one hundred twenty five / one hundred twenty five)one hundred twenty five
1,000 = (one thousand / one thousand)one thousand
999 = (nine hundred ninety nine / nine hundred ninety nine)nine hundred ninety nine
500,000 = (five hundred thousand / five hundreds thousand)five hundred thousand

D. Translate into Your own Language. — PT “Traduza para o inglês”

Your own LanguageEnglish
 three thousand five hundred
 twelve thousand
 two hundred fifty thousand
 one million

For faster mastering these numbers practice using them with real life English vocabulary.

Lesson 5: English Numbers Explained for Beginners from 1 Million to 1 Billion. — PT “Números de 1 Milhão a 1 Bilhão”


How to read big numbers in English?

Here is how:

1,000,000

EnglishPortuguês
1,000,000 = one million1.000.000 = um milhão

As we said earlier 1,000,000 is the next number after 999,999. PT “Este é o número seguinte após 999.999.” So we say:


10,000,000 — PT “10.000.000?”

EnglishPortuguês
10,000,000 = ten million10.000.000 = dez milhões

100,000,000 — PT “100.000.000”

EnglishPortuguês
100,000,000 = one hundred million100.000.000 = cem milhões

1,000,000,000 — PT “1.000.000.000”

EnglishPortuguês
1,000,000,000 = one billion1.000.000.000 = um bilhão

One billion is the next number after 999,999,999. — PT “Um bilhao é o número seguinte após 999.999.999.”


Lesson 6: How to Read Big Numbers? — PT “Como Ler Números Maiores?


How to Read Numbers like 1,234,567 in English?

 As we said earlier, reading numbers in English follow this pattern:

Millions + thousands + hundreds + tens + ones. — PT “milhões + milhares + centenas + dezenas + unidades”


 Example

1,234,567

PartEnglishPortuguês
1,000,000one millionum milhão
234,000two hundred thirty four thousandduzentos e trinta e quatro mil
567five hundred sixty sevenquinhentos e sessenta e sete

Full reading — Leitura completa

One million two hundred thirty four thousand five hundred sixty seven
PT “um milhão duzentos e trinta e quatro mil quinhentos e sessenta e sete”.


More examples on How to Read Big Numbers in English: Step by Step

Numbers in EnglishPortuguês
DigitsWords 
2,000,000two milliondois milhões
5,500,000five million five hundred thousandcinco milhões e quinhentos mil
12,345,000twelve million three hundred forty five thousanddoze milhões trezentos e quarenta e cinco mil
99,999,999ninety nine million nine hundred ninety nine thousand nine hundred ninety ninenoventa e nove milhões novecentos e noventa e nove mil novecentos e noventa e nove
350,600,200three hundred fifty million six hundred thousand two hundredtrezentos e cinquenta milhões seiscentos mil duzentos

Lesson 7: Spelling Rules for Big Numbers. — PT “Regras de Ortografia para Números Maiores”


Rule 1: No s —PT “Regra 1: Sem s

IncorretCorret
❌ millions dollars✅ million dollars
❌ five thousands people✅ five thousand people

 “In English, million and thousand do not take an ‘s’ when used before nouns. — PT “Em inglês, million e thousand não recebem “s” quando usados antes de substantivos”.

Example: Thousand people attended the meeting.


Rule 2: Use hyphens for 21–99.  — PT “Regra 2: Use hífens para 21–99”

EnglishPortuguês
Seventy-onesetenta e um
Sixty-sixsessenta e seis
Forty-eightquarenta e oito

Do the same even inside big numbers this way:

45,678
forty-five thousand six hundred seventy eight — PT “quarenta e cinco mil seiscentos e setenta e oito”.


Rule 3: “And” is optional. — PT “And” é opcional

American English:

One million two hundred fifty thousand

British English:

One million two hundred and fifty thousand

Both are correct depending on the country. PT “Ambos estão corretos; dependendo do país”.


Rule 4: Group numbers in threes. — PT “Regra 4: Agrupe os números em trios”.

FormatPaíses
1,234,567EUA, Reino Unido
1 234 567França, Canadá (francês)
1.234.567Brasil, Portugal, Moçambique

“Different countries use different separators, but the structure (millions–thousands–hundreds) is always the same.”

Lesson 8: Big Numbers in Real Life. — PT “Números Maiores na Vida Real”


Money — Dinheiro

The company made two million dollars last year.— PT “A empresa faturou dois milhões de dólares no ano passado.”

The house costs five hundred thousand dollars.—PT “A casa custa quinhentos mil dólares.”


Population — População

My city has three million people.—PT “Minha cidade tem três milhões de habitantes.”


Distance — Distância

The sun is one hundred fifty million kilometers away. PT “O sol está a cento e cinquenta milhões de quilômetros de distância.”


Social media — Redes sociais

 “The channel has one billion views. —  PT “O canal tem um bilhão de visualizações.”


Work — Trabalho

We produced three million units this year. PT “Produzimos três milhões de unidades este ano.”

To practice these numbers use them with essential verbs or vocabulary builder. Practice helps build confidence.


Lesson 9: English Numbers from 1,000 to 1 billion — Practice Exercises


A. Write the numbers in words in your Note book. — PT “Escreva os números por extenso no seu bloco de notas”

DigitWordsPortuguês
20,000,000 vinte milhões
100,000,000 cem milhões
3,500,000 três milhões e quinhentos mil
9,999,000 nove milhões novecentos e noventa e nove mil
1,000,000,000 um bilhão

B. Write the numbers in digits — PT “Escreva os números em algarismos”

WordsDigitsPortuguês
twenty million vinte milhões
one hundred million cem milhões
three million five hundred thousand três milhões e quinhentos mil
nine million nine hundred ninety nine thousand nove milhões novecentos e noventa e nove mil
one billion um bilhão

C. Choose the correct answer — PT “Escolha a resposta correta”

QuestionCorrect Answer
1,000,000 = (one million / one millions)one million
10,000,000 = (ten million / ten millions)ten million
45,678 = (forty five thousand six hundred seventy eight / forty five thousand six hundred seventy eight)forty five thousand six hundred seventy eight
100,000,000 = (one hundred million / one hundred millions)one hundred million
1,000,000,000 = (one billion / one billions)one billion

Lesson 10: Ordinals (Millionth to Billionth). —PT “Ordinais: De Milionésimo a Bilionésimo”

NúmeroEnglishPortuguês
1,000,000thone millionthmilionésimo
10,000,000thten millionthdez milionésimo
100,000,000thone hundred millionthcentésimo milionésimo
1,000,000,000thone billionthbilionésimo

Examples

EnglishPortuguês
“He is the one millionth customer.”“Ele é o milionésimo cliente.”
“This is the one billionth view on the video.”“Esta é a bilionésima visualização do vídeo.”

This is all we had to say about the numbers. What next, now that you know how to write and read basic and big numbers in English? — Here is what: Practice using them in your everyday life. Use them together with English vocabulary and verbs you’ve gone though earlier on this site. Only by practicing you can build confidence in English.

Thank you for reading this post.

I’m Sabino Manuel the creator of “English Journey: Start Speaking with Confidence – One Step at a Time”.

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Sabino Manue

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