Counting to 1,000 and Beyond
1 to 20
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| one | two | three | four | five | six | seven | eight | nine | ten |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| eleven | twelve | thirteen | fourteen | fifteen | sixteen | seventeen | eighteen | nineteen | twenty |
21 to 99
Join these:
| 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |
| twenty | thirty | forty | fifty | sixty | seventy | eighty | ninety |
to these:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| -one | -two | -three | -four | -five | -six | -seven | -eight | -nine |

Note that forty does not have a u but four does!
Examples:
| 53 | fifty-three | |
| 60 | sixty | |
| 72 | seventy-two | |
| 99 | ninety-nine |
100 to 999
Write how many hundreds ("one hundred", "two hundred", etc), then the rest of the number as above.
In UK English use "hundred and".
Examples:
| US | UK | |||
| 101 | one hundred one | one hundred and one | ||
| 116 | one hundred sixteen | one hundred and sixteen | ||
| 144 | one hundred forty-four | one hundred and forty-four | ||
| 212 | two hundred twelve | two hundred and twelve | ||
| 271 | two hundred seventy-one | two hundred and seventy-one | ||
| 621 | six hundred twenty-one | six hundred and twenty-one | ||
| 999 | nine hundred ninety-nine | nine hundred and ninety-nine |

1,000 to 999,999
Write how many thousands ("one thousand", "two thousand", etc), then the rest of the number as above.
Examples:
| US | UK | |||
| 1,101 | one thousand, one hundred one | one thousand, one hundred and one | ||
| 15,016 | fifteen thousand, sixteen | fifteen thousand, and sixteen | ||
| (No hundreds? Don't write them! but the and is still needed in the UK) |
||||
| 112,621 | one hundred twelve thousand, six hundred twenty-one | one hundred and twelve thousand, six hundred and twenty-one | ||
| 999,999 | nine hundred ninety-nine thousand, nine hundred ninety-nine | nine hundred and ninety-nine thousand, nine hundred and ninety-nine | ||
Millions and More
Write how many millions then the rest of the number like above.
Examples:
| US | UK | |||
| 1,006,101 | one million, six thousand, one hundred one | one million, six thousand, one hundred and one | ||
| 191,232,891 | one hundred ninety-one million, two hundred thirty-two thousand, eight hundred ninety-one | one hundred and ninety-one million, two hundred and thirty-two thousand, eight hundred and ninety-one | ||
| 999,999,999 | nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine | nine hundred and ninety-nine million, nine hundred and ninety-nine thousand, nine hundred and ninety-nine |
Use the same method for:
| Billion | 1,000,000,000 |
| Trillion | 1,000,000,000,000 |
| Quadrillion | 1,000,000,000,000,000 |
| Quintillion | etc ... |
| Sextillion | |
| Septillion | |
| Octillion | |
| Nonillion | |
| Decillion | |
| Undecillion | |
| Duodecillion | |
| Tredecillion | |
| Quattuordecillion | |
| Quindecillion | |
| Sexdecillion | |
| Septemdecillion | |
| Octodecillion | |
| Novemdecillion | |
| Vigintillion | 1 followed by 63 zeros! |
Commas
When writing the number put commas every three digits like this:
1,006,101
When writing words some people use commas, some don't. Which do you prefer?
- one million six thousand one hundred one
- one million, six thousand, one hundred one