Online Islamic Calculators - Zakat calculator will show the ZAKAAT that is due on you, when you become Sahib e Nisab (7.5 Tola Gold/Sona or 52.5 Tola Silver/Chandi or cash amount or business commodity equal to 52.5 tola silver and one year passes over it.) Zakat is an obligatory duty and one of the five pillars of Islam. It is mandatory when two conditions are simultaneously satisfied which are Nisab and the Due Date. In Shariah, 2.5% of your total wealth is the rate of Zakat. Find online best Zakat calculator for important fareeza.