I can't remember why, but I set myself a personal challenge to create a spreadsheet that could convert numbers to text.
Here it is. Type in a number between 1 and 999,999 in the red cell and it will write it out in words in the blue. English style, not American, so the ands are included.
As an aside, the lowest positive integer for which the letter a is required is 101 (one hundred and one). In American, it's 1,001 (one thousand one).
