How to calculate Zakat?

In order to be eligible to pay Zakat, your asset value must be above the Nisab threshold. Once you have determined you are liable to pay Zakat then you would take the following steps:

1. Assets:  Add up all your Zakatable assets which encompass your liquid assets or cash generating assets including:

1. Cash 
2. Gold and/or Silver
3. Investments (zakatable)
4. Properties (zakatable)
5. Debt Owed to You (zakatable)

2. Liabilities: You would then deduct all liabilities that are deductible

1. Any payments you are to make within one lunar year (bills etc.)
2. Any debts you plan on paying back within one lunar year
3. Get the net amount from 1 and 2. (Assets minus Liabilities)
4. Take the amount from 2c and multiply by 2.5%

Regarding livestock and agriculture, calculate the Zakat on these separately in accordance to their own Nisab and payment methods/times.