Ten Billion in Numbers

How to write 10,000,000,000 in words

The number 10,000,000,000 is written “ten billion” in British English.

Because 10,000,000,000 is below one thousand it is a single group: name the hundreds and stop. That gives “ten billion”.

In running text the number is normally lowercase: “the fee is ten billion pounds”. At the start of a sentence, in a heading, or on a legal document it takes capitals: Ten Billion. Formal documents often give both forms together, for example “ten billion (10,000,000,000)”, so that a reader can check one against the other.

2 words · 10 letters · 10,000,000,000 = 10 × 1,000,000,000 (one billion)

Ten Billion in figures

To turn “ten billion” back into digits, work group by group. Each group word (billion, million, thousand) marks a block of three digits. The result is 10,000,000,000, or 10000000000 without separators.

Commas go after every third digit counting from the right: 10,000,000,000. In Britain and the United States this is the standard grouping; in much of Europe the same number appears as 10.000.000.000, and international scientific style uses spaces: 10 000 000 000.

How to write 10,000,000,000 on a cheque

Banks read the amount in words as the legal amount, so it must be exact. Write the pounds in words, add the word pounds, and finish with only so that nothing can be added afterwards.

• With pence: add the pence after the pounds – “Ten billion pounds and fifty pence only” for £10,000,000,000.50 – or write the pence as a fraction, “Ten billion pounds 50/100”.
• US check: “Ten billion and 00/100 dollars”. American cheques drop the “and” after the hundreds and put it before the cents.
• Bangladesh, India and Pakistan: the currency word comes first and the amount is counted in lakh and crore – “Taka one thousand crore only”, with the figure written Tk. 10,00,00,00,000/=.

Read the full guide to writing a UK cheque or the guide to writing a cheque in Bangladesh for the layout, the date, and what to do if the words and figures disagree.

10,000,000,000 in British and American English

10,000,000,000 is spelled exactly the same way – “ten billion” – in British and American English. The two varieties only differ when a number contains hundreds followed by tens or units, where British English adds “and”. Read more in our guide to British vs American English numbers.

10,000,000,000 in lakh and crore (India, Bangladesh and Pakistan)

In India, Pakistan, Bangladesh and Nepal, large numbers are grouped differently. After the first thousand the digits are grouped in twos, and the units are lakh (100,000) and crore (10,000,000). So 10,000,000,000 becomes 10,00,00,00,000, read as “one thousand crore” – or simply 1,000 crore.

On an Indian cheque or invoice the amount reads “Rupees one thousand crore only”; in Bangladesh it is “Taka one thousand crore only”. Our lakh and crore conversion guide explains the system in full.

10,000,000,000 in Bangla (বাংলায় ১০,০০,০০,০০,০০০)

In Bangla, 10,000,000,000 is written ১০,০০,০০,০০,০০০ using Bengali digits, and in words it is এক হাজার কোটি. Bangla has its own word for every number from one to ninety-nine, and above that it counts in হাজার (thousand), লাখ (lakh) and কোটি (crore), the same grouping used across Bangladesh and India.

On a cheque or invoice written in Bangla the amount reads এক হাজার কোটি টাকা মাত্র (“এক হাজার কোটি taka only”). In English on the same cheque it is Taka one thousand crore only – see How to write a cheque in Bangladesh.

Common mistakes when writing 10,000,000,000

• Pluralising the group words. It is billion, never “hundreds”, “thousands” or “millions” after a number.
• Using shorthand in formal documents. 10bn is fine in a message, but a cheque or contract needs ten billion or 10,000,000,000.
• Miscounting the zeros. 10,000,000,000 has 11 digits. Check the commas: every group between commas should have exactly three digits.

Other ways to write 10,000,000,000

Half of 10,000,000,000 is 5,000,000,000 (five billion). Double 10,000,000,000 is 20,000,000,000 (twenty billion).