About KSACalc
A small, independent set of calculators built for life in Saudi Arabia and the wider Saudi - finance, family, faith, and the everyday admin no global calculator covers correctly.
Why this exists
Most online calculators are built for the United States or Europe. They quietly assume a 40-hour week, a 1.5× overtime rate, a Friday-Sunday weekend, a tax bracket that doesn't exist in the KSA, and a calendar that ends on December 31. We use them anyway, and the answers we get are slightly wrong in ways that matter - gratuity short by a month, a tenancy budget that ignores Ejari, a working-day count that includes Friday.
KSACalc is the version where the rules are right the first time. Saudi Arabia labour law for gratuity and salary. Saudi Arabia VAT for invoices. Saudi Arabia banking caps for mortgages. Saudi Arabia prayer times by city. The point is not to be the prettiest calculator on the internet - it's to be the one you can actually trust for a Saudi Arabia-context decision.
How we calculate
Every formula on KSACalc maps to a public source - a federal decree, a ministry circular, a bank disclosure, a published utility tariff, an established astronomical algorithm. Each calculator page lists the source under the result. When the rule changes, we change the calculator.
- VAT - Saudi Arabia Zakat, Tax and Customs Authority, Federal Decree-Law No. 8 of 2017.
- Gratuity, salary, working days - Saudi Arabia Labour Law (Federal Decree-Law No. 33 of 2021) and MOHRE guidance.
- Visa, Kingdom ID - ICA and GDRFA published fee schedules; Luhn checksum for ID validation.
- Mortgage - Saudi Arabia Central Bank LTV ratios and standard amortisation formula.
- DEWA - Riyadh Electricity & Water Authority published tariff slabs.
- Prayer, Hijri - Umm al-Qura calendar; established astronomical methods (MWL, ISNA, Egyptian, etc.) per user setting.
- School fees, tenancy - KHDA-published ranges and standard Riyadh/Riyadh market practice for Ejari, agency and security deposits.
Update policy
We review every calculator on a rolling schedule and immediately when a law, tariff, or fee schedule changes. Each page shows a Last reviewed date and the source link. If you find a stale figure, please tell us - see the contact section below.
Privacy
All calculations run in your browser. Numbers you type never leave your device. We do not require sign-up, do not set marketing cookies, and do not run third-party trackers. The site uses Cloudflare for delivery and (optionally) Cloudflare Web Analytics, which counts visits without setting cookies or fingerprinting.
Disclaimer
KSACalc is a reference tool, not advice. Tax, legal, financial, and religious decisions depend on facts specific to you that a calculator cannot see. For anything material - a tax filing, a contract, a settlement, an inheritance - confirm with a licensed Saudi Arabia professional. We accept no liability for decisions made on the basis of these calculators.
Contact
Spotted a bug, an outdated number, or a calculator we should add? Email [email protected]. We read every message and update fast - typically inside a week for substantive corrections.
Sister site
For global, country-agnostic calculators (percentage, BMI, loan, currency, etc.), see JustCalc.