A guinea is a long obsolete unit of currency and equalled 21 shillings = 1 pound 1 shilling = ￡1.05 in the "new money" we have used since 1971. Now you can work it out from whatever today's exchange rate is.

In 1820 How much was a guinea worth

A guinea is one pound and one shilling, a sum useful years ago when calculating anything which needed to have a 5% fee deducted (especially at auctions). So these days a guinea would be ￡1.05, which at todays exchange rate is $1.62.

As of today (February 2015) a pound is worth 1.5 dollars, roughly, so a guinea would be about $1.57. If you are reading an historical novel, it will be different.

1 guinea = 0 dollars 1 dollar = 7235 guineas

Why is this in the rodents section? And 1 USD buys 7235 Guineas so 1 Guinea is like .00000001 USD or something (less than 1 penny)

Guinea no longer exist.WAS ONE POUND ONE SHILLING which is now ￡1.05.....so is about $1.62