Calculators

Everyday and specialty calculators for dates and age, percentages and discounts, tips, profit margin, GST/VAT, mortgages and student loans, salary and income-tax estimates, GPA/CGPA, zakat, gold and silver, public holidays, SWIFT/BIC lookup, and region-specific helpers such as Pakistan salary tax and Poland B2B/JDG. Open a tool, enter the fields it asks for, and read the breakdown on the page so you can see how the result was built.

How to use these calculators

Match the calculator to the question (date span vs tax estimate vs metal weight). Prefer tools that name the jurisdiction or rate source when your case is country-specific. Check units and rounding notes before you rely on a figure.

Limits

Estimates follow the rules documented on each tool. Tax and loan results are not filings or lender quotes. Confirm official rates and eligibility with the relevant authority or provider.

Calculators