Financial calculators

Loans, salaries, tax and business — with the law or formula named in every calculator

العربية

Calculators for the money questions you meet every day: a loan or car instalment, end-of-service gratuity and overtime under your country’s labour law, VAT, profit margin and the price of gold by karat.

Every calculator names the law or formula it uses, and we review tax rates and labour laws regularly.

Salary and end of service6

Loans, finance, savings and shares6

Business, tax and prices6

Gold and rent2

Articles that explain the maths

ARTICLE

18K vs 21K vs 24K gold: the difference

Gold content, price and durability of each karat, which to buy, and the zakat nisab in each.

Results are accurate estimates using the formulas and laws named in each calculator, but your contract, bank or employer may add fees or special terms; your contract and the official body are the final reference. How each calculator works and its sources.

Frequently Asked Questions

Which laws do the financial calculators use?

Each calculator names its source: for example the Saudi Labour Law (Articles 84 and 85) for end-of-service gratuity, Federal Decree-Law No. 33 of 2021 in the UAE, and Egypt’s Labour Law No. 14 of 2025 for overtime. We review rates and laws every three months.

Does the loan calculator use flat or reducing interest?

Both: choose a flat rate on the full amount (common for instalment and car loans) or a reducing rate on the remaining balance, and compare the difference.

Is the result final?

It is an estimate using the published formulas, but a bank or employer may add fees or contract terms. Check your contract before deciding.