Guides, tips & how-tos

Calculate the final price after a discount, find the original price before a discount, and work backwards from a sale price to the discount percentage.

Google Analytics 4 basics for small websites — what it tracks, the reports that actually matter, and how to read them without gett...

How EMI (Equated Monthly Instalment) is calculated on a loan — the formula, what affects the monthly payment, and how to compare d...

Calculate GST or VAT on a price — adding tax to a base price, removing tax from a tax-inclusive price, and presenting tax correctl...

Calculate percentage increase or decrease between two numbers — the exact formula, when to use which version, and how to reverse i...

How to calculate percentages quickly — the three types of percentage problems most people encounter, with plain formulas and pract...

How to calculate ROI on any investment — the simple formula, what counts as a "good" ROI, and common mistakes in calculating it.

Calculate working days between two dates — excluding weekends and, where relevant, public holidays.

Calculate your exact age in years, months and days — and why the exact calculation is trickier than it seems for dates near month...

Convert between time zones for international meetings — the key time differences from Pakistan, how Daylight Saving Time affects t...