Four Hundred Million in Numbers

How to write 400,000,000 in words

The number 400,000,000 is written “four hundred million” in British English.

Because 400,000,000 is below one thousand it is a single group: name the hundreds and stop. That gives “four hundred million”.

In running text the number is normally lowercase: “the fee is four hundred million pounds”. At the start of a sentence, in a heading, or on a legal document it takes capitals: Four Hundred Million. Formal documents often give both forms together, for example “four hundred million (400,000,000)”, so that a reader can check one against the other.

3 words · 18 letters · 400,000,000 = 400 × 1,000,000 (one million)

Four Hundred Million in figures

To turn “four hundred million” back into digits, work group by group. Each group word (billion, million, thousand) marks a block of three digits. The result is 400,000,000, or 400000000 without separators.

Commas go after every third digit counting from the right: 400,000,000. In Britain and the United States this is the standard grouping; in much of Europe the same number appears as 400.000.000, and international scientific style uses spaces: 400 000 000.

How to write 400,000,000 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 – “Four hundred million pounds and fifty pence only” for £400,000,000.50 – or write the pence as a fraction, “Four hundred million pounds 50/100”.
• US check: “Four hundred million 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 forty crore only”, with the figure written Tk. 40,00,00,000/=.

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.

400,000,000 in British and American English

400,000,000 is spelled exactly the same way – “four hundred million” – 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.

400,000,000 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 400,000,000 becomes 40,00,00,000, read as “forty crore” – or simply 40 crore.

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

Common mistakes when writing 400,000,000

• Pluralising the group words. It is hundred, million, never “hundreds”, “thousands” or “millions” after a number.
• Using shorthand in formal documents. 400M is fine in a message, but a cheque or contract needs four hundred million or 400,000,000.
• Miscounting the zeros. 400,000,000 has 9 digits. Check the commas: every group between commas should have exactly three digits.

Other ways to write 400,000,000

Half of 400,000,000 is 200,000,000 (two hundred million). Double 400,000,000 is 800,000,000 (eight hundred million).