सूSutra Formula Shelf
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Feedback

Spot a mistake? Missing a formula?

Sutra is maintained by one person, and every correction makes it more trustworthy for the next student who looks something up. Tell us what's wrong, or what you wish was here.

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This form opens your email app with everything pre-filled, since Sutra doesn't run its own server. Nothing you type here is stored or sent anywhere until you actually send that email.

About Sutra

Sutra is a single-page reference shelf for Mathematics and Science formulas, built for students working through the Class 6–12 NCERT curriculum — and anyone who just wants a fast, clean place to look a formula up.

Who built it

Sutra is built and maintained by Mohak Choubey, an independent developer based in Indore, India. It's free, has no ads, and runs entirely in your browser.

Privacy Policy

Last updated · 2026

What we collect

Nothing leaves your device from the main shelf. This feedback page opens your own email app with your message pre-filled — Sutra never receives or stores it directly.

Local storage

Your theme preference and bookmarked formulas are saved in your browser's local storage only, never transmitted anywhere.

Third-party resources

This page loads fonts and libraries from public content delivery networks, which may log standard technical request data as part of normal web infrastructure.

Terms & Conditions

Last updated · 2026

Using this site

Sutra is provided free of charge as a study reference, for personal or classroom use.

No warranty

Content is compiled carefully but Sutra is not an official NCERT product and may contain errors. Always cross-check against your textbook before an exam.

Contact

Corrections are always welcome through this feedback page.