What is the amount of Nisab in the Islamic texts?
• 20 Dinar (gold coins) also known as the ‘the gold Nisab’.
• 200 Dirham (silver coins) also known as ‘the silver Nisab’.
There are two standards as opposed to one. The reason for this is that Dinar and Dirham were commonly and interchangeably used in the markets in the Prophetic era. The exchange rate at the time was 1:10, and therefore the Zakat payer ended up paying the same amount in terms of purchasing power in the prophetic era.
And Allah knows best!