Disclosure & sources

Add This Marks is free to use and reader-supported. Here is exactly how we handle data, money and accuracy.

• Reference, not official. Grading scales and pass marks are reference information gathered from published sources. They change and vary by institution — always confirm with your own school, board or university before relying on a boundary.
• Nothing is stored. The calculators run entirely in your browser. We do not upload, save or share your marks.
• Affiliate links are labelled. Some outbound links may be affiliate links: if you buy through them we may earn a commission, at no extra cost to you. It never changes which scales we publish or how a calculator computes.
• Sponsored is labelled. Any paid placement carries a clear “Sponsored” label and is never disguised as reference data.
• No fabricated stats. We publish no invented metrics and no year-specific title claims.