Free calculators that show their working
Store Online Digital builds free salary, tax, land and utility calculators for people who want a clear answer and want to understand how it was reached. Every tool explains its formula, cites its sources and shows when its rates were last checked.
Most calculators give a number. Few tell you where it came from.
Searching for a tax slab or a gratuity formula usually leads to one of two things: a government PDF that is hard to read, or a calculator with no explanation, no date and no way of knowing whether the rates are still current.
Store Online Digital sits in between. Each calculator does the arithmetic for you, and the page underneath explains the rule in plain English, walks through a worked example and links to the official source, so you can check the result yourself.
“If you cannot check a calculator's answer by hand, you should not have to trust it blindly. That is the standard every tool here is built to.”
— ADNAN NASEEM, FOUNDERFour steps before a calculator goes live
Find the official rule
Rates and formulas come from tax authorities, finance acts, labour laws, gazettes and regulators. If an official text is not online, a reputable firm or newspaper is used and named.
Cross-check it
Every figure is compared against at least one more source. Anything that is uncertain or recently changed is flagged on the page or made editable.
Test with real examples
The calculator is run against worked examples published by the source, and the results must match before the page is published.
Date it and update it
Each page shows when it was last checked. When a budget or regulator changes a rate, the tool and its guide are updated together.
Tools for everyday money and paperwork questions
Salary & income tax
Take-home pay and PAYE for Pakistan, India, the Gulf, Africa and more.
End of service & gratuity
Gratuity, indemnity and final pay under each country's labour law.
Property & land
Marla, kanal, bigha and ropani conversions and Punjab transfer tax.
Bills & solar
Electricity bill estimates and solar system sizing for Pakistani homes.
Urdu & language tools
Roman Urdu, InPage, Bijoy and Kruti Dev converters and Urdu text tools.
Guides
Plain-English explanations of the rules behind the numbers.
Adnan Naseem
Founder · WordPress developer & SEO specialist · Lahore, PakistanAdnan builds and maintains every calculator on Store Online Digital. He works on WordPress development and search optimisation for websites in Pakistan, and previously ran the tech blog techbyadnan.com.
He started this site after repeatedly seeing friends and clients rely on outdated tax tables and calculators that could not explain their own results.
- Tools run in your browser, so what you type is not sent to or stored by the site.
- Results are clearly labelled as estimates, not tax, legal or financial advice.
- Errors reported by readers are checked against the official source and corrected.
Spotted a rate that has changed?
Send a link to the official notice and the tool will be checked and updated.