Islamic
Islamic calculator guides, tutorials and formula breakdowns from the CalcaTools editorial team.
What Is Khums and How to Calculate It (Shia Guide)
Khums is an annual 20% Islamic due on your yearly surplus after expenses. See what it applies to, how the khums year works, and a worked example.
Zakat on Crypto: How to Calculate It on Bitcoin & Coins
Crypto held to invest or trade is zakatable at 2.5% of market value on your zakat date. See how to value coins, handle staking, and a worked example.
Zakat on Stocks: How to Calculate It (2026)
Zakat on stocks is 2.5% of their zakatable value once a lunar year. See how to treat trading vs long-term shares, dividends, and a worked example.
Islamic Inheritance (Faraid): How Heirs’ Shares Are…
Islamic inheritance (Faraid) uses fixed Quranic shares. Learn the order of distribution, the main shares for spouse, parents and children, and the 2:1 principle with a worked example.
What Is Nisab? The Gold and Silver Zakat Threshold Explained
Nisab is the minimum wealth before Zakat is due: 87.48g of gold or 612.36g of silver. Learn which standard to use, the lunar-year (hawl) rule and the 2.5% Zakat rate.
Hijri to Gregorian Conversion: How the Islamic Calendar W…
Why Ramadan moves earlier each year, how the 354-day lunar calendar maps to the Gregorian one, and how to convert any date by hand.
How to Calculate Zakat in 2026: A Step-by-Step Guide for …
Cash, gold, stocks, crypto, business inventory — what counts, what doesn't, the nisab threshold, and a worked example you can copy.