Contact us

Last updated September 26, 2026

We read every message. The fastest way to reach us is email:

[email protected]

Report a wrong result

If a tool gives an answer you believe is wrong, tell us the page, the numbers you entered, the result you got and the result you expected. We check reports promptly and note confirmed fixes on the page — see our corrections policy.

Suggest a tool or guide

Tell us what you tried to calculate and could not. Requests from students and teachers help us decide what to build next.

Business and advertising enquiries

Send partnership questions to the same address. Advertising never changes our results or editorial choices.

Copyright and content complaints

If you believe content on this site infringes your rights, email us the page URL, a description of the material and proof of ownership. We act on valid notices promptly.

Grievance officer

In accordance with the Information Technology Act, 2000 and the Information Technology (Intermediary Guidelines and Digital Media Ethics Code) Rules, 2021, the Grievance Officer is:

Name: Hindustan Prime (Grievance Cell)
Email: [email protected]
Address: Village Mawaiya, Chakiya, Chandauli, Uttar Pradesh — 232102, India
Acknowledgment within 24 hours; resolution within 15 days.