Here is a simple number calculator that will also: compute a date that is x number of days before or after a date you specify; let you know the day of the year of any date; tell you what time it is anywhere in the world; convert just about any US or British length, volume or weight to it's metric equivalent with the conversion calculator; figure the amount of foreign currency that a number of dollars is worth (or the other way around) given the current exchange rate with the currency calculator; and easily compute discounts and sales tax on any amount.