At Britains conversion to decimal currency in February, 1971, the Sixpence had no new decimal equivalent coin, but was equal to 2.5 New Pence in the new currency.
The British Sixpence was last minted for general circulation in 1967.
From a coin collectors perspective, a Sixpence, depending on the year, condition and method of minting, could be worth anything from bullion value to several thousand pounds GBP.
Please note that since the Sixpence is part of a redundant or obsolete currency, it no longer has an "exchange rate" with other currencies.
A sixpence in straight currency conversion is 2.5p but sixpences made before 1920 are sterling silver and worth a pound or two in silver scrap regardless of the year and condition, sixpences made from 1920-1946 are 50% silver and worth 50p to a pound depending on silver prices based on silver scrap. Of course the value is different based on the date and condition.
It depends on the year and the condition of the coin. Without knowing those two things, it is impossible to say.
A British Sixpence in 1700 has the purchasing power of about £3 GBP today.
Six old Pence was Half a Shilling (Twelve Pence) however, it was also a coin in its own right, a small round coin and silver in colour commonly known as a "tanner".
Some are, some are not.
It depends greatly on the country of origin, the year and the condition of the coin.
By "used" I expect you mean heavily circulated... probably less than $2.
1/40 of a pound.
A sixpence was worth 1/40 of a pound so it would be worth about $.04. (1/40 of $1.61)
16.5 pence
The U.S. didn't exist in 1700.
Under pre-decimal currency in the UK, a shilling was worth twelve pence, and a sixpence worth six pence. The UK adopted decimal currency in 1971.
Good luck if you have one, but the last British Sixpence was minted in 1967.
2.5 pence
$1.50
As exchange rates stand today, £1700 (GBP) is worth roughly $3375 (CAD).
No U.S. Nickels are dated 1700. The first nickel was issued in 1866.
1 penny
$1700
about 5,000 dollars