Sumtrail is a free set of money calculators for people in Pakistan, the UAE and beyond. We built it because most calculators give you a number with no way to check it. Ours show every step of the working and name the law or rule behind it.
How we keep the numbers right
Each calculator follows a published source: the Finance Act for Pakistan salary tax, Federal Decree-Law No. 33 of 2021 for UAE gratuity, and widely accepted methods for zakat and loan instalments. After every budget or change in the law we update the calculator and the “last checked” date. The rules were last checked on 3 October 2026.
Your privacy
All calculations run inside your browser. The salary, dates and amounts you type are never sent to us or stored anywhere.
How the site is funded
Sumtrail is free to use and supported by advertising. Advertisers have no say in our calculations or guides.
Our other site
We also run PDFEditor, a free set of PDF and photo tools that also work privately in your browser.
Found a mistake or have a suggestion? Please contact us. We read every message.