English Money
| 1 guinea [8.35 / 7.65 g Au] | = | 21 shillings, 6 pence |
| 1 pound / £ | = | 20 shillings |
| 1 crown | = | 5 shillings |
| 1 half-a-crown | = | 2 shillings, 6 pence |
| 1 shilling / s. | = | 12 pence |
| 1 penny / d. | = | 4 farthings |
| 1 farthing |
The guinea gold coin, first issued on 6 Feb. 1663 (1662 Old Style) with the value of 20s reached nearly 30s in 1694 before the rehabilitation of the silver coinage under William III. allowed a new fixing at 21s 6d in 1698. The proclamation of Dec. 1717 fixed it at 21 s.
Click here if you have to calculate with pounds, shillings and pence.
More information on British money.
Japan's Money
| Gold | |||
| 1 Oban | = | 7.5* Ryo | |
| 1 Ryo / Koban | = | 4 Bu | |
| = | 4 Kan | ||
| = | 70* Momme | ||
| 1 Bu | = | 4 Shu | |
| 1 Shu | |||
| Silver | |||
| 1 Kamme | = | 1000 Momme | |
| 1 Momme [3.75 g] | = | 10 Fun | |
| 1 Fun | = | 10 Rin | |
| 1 Rin | |||
| Copper | |||
| 1 Kan [3.75 kg] | = | 1000 Mon | |
| 1 Mon |
From 1695 to 1710 the fineness of minted gold and silver was reduced. The silver content per momme – 3.75 g – fell from 3 to 1.88 to 0.75 g. Money of the original value was finally minted for the trade with Korea. Calculations with 3 g silver per momme accept the nominal value of the coin, the shogunate government tried to impose. Change the first value in the exchange rate bellow to actual amounts of silver per momme to get the real money equivalents foreign traders demanded.
* Market rates. The official rates were 1 Oban = 10 Ryo and 1 Ryo = 50 momme silver.
See special page on Japan's money.