Last updated: September 27, 2026
This page explains how we build our calculators, write our guides and keep them accurate, and how advertising is kept separate from our content.
What We Publish
Marks Percentage Calculator publishes free calculators and plain-language guides that help students, parents and teachers work out marks percentages, CGPA and GPA conversions, averages and related academic calculations.
How We Build Our Calculators
- Every calculator uses the standard published formula for that calculation, and we show the formula on the page so you can check the working yourself.
- Before a calculator is published, we test it against worked examples calculated by hand.
- Where boards or universities use different conversion rules (for example, CGPA to percentage), we explain the difference and tell you to follow your own institution’s official rule.
How We Write Our Guides
- We explain formulas step by step with worked examples.
- We refer to official sources such as board and university notifications wherever rules differ between institutions.
- We avoid exaggerated claims and clearly say when a result is an estimate.
- Where AI tools help with drafting, a person reviews, checks and edits the content before it is published. We take responsibility for everything we publish.
Updates and Corrections
We review our calculators and guides when rules change or when readers report a problem. If you find a mistake, email admin@markspercentagecalculator.online with the page link and details, and we will correct it promptly.
Advertising and Independence
- This website is supported by display advertising, including Google AdSense.
- Advertisers have no influence over our calculators or guides.
- We do not publish paid reviews or sponsored posts presented as independent content.
- Ads are clearly separated from our content and are never disguised as calculator buttons or links.
Contact
Questions about this policy: admin@markspercentagecalculator.online