On Drop Rate
Privacy
About

About On Drop Rate

On Drop Rate helps you check roughly how long you'd need to grind for an item, and whether you're actually dry right now, or just feeling like it.

We're passionate OSRS players, grinding since the game's 2013 release across multiple accounts and every seasonal game mode along the way.

This vibe-coded project is built and maintained by us.

Greetings from Team On Drop Rate.

Privacy Policy

Who runs this: On Drop Rate (ondroprate.com). Questions or data requests can be sent to info@ondroprate.com.

What we collect: Google Analytics (GA4), and only after you click Accept on the cookie banner. We don't have accounts, don't store anything you type into the search box, and don't sell or share data with anyone beyond Google acting as our analytics provider.

Bug reports: if you use the "Report a bug" form we store the name, email address and description you submit, so we can look into the problem and reply. We also keep the page you were on, your browser's user-agent string, and a one-way hash of your IP address — the hash lets us spot abuse of the form without us holding your actual IP. This data is kept only as long as the report is useful, and is never used for marketing or shared with anyone.

Analytics details: pages viewed, approximate location (from IP, not exact), device/browser type, and how you found the site, via cookies typically named _ga and _ga_* (up to 2 years). See Google's Privacy Policy for how Google processes this data.

Legal basis: for analytics, your consent, given (or withheld) via the cookie banner — you can withdraw it at any time by clearing this site's cookies/storage in your browser, and you'll be asked again on your next visit. For bug reports, the data you send us so we can act on your report.

Your rights: under GDPR you can request access to, correction of, or deletion of any data associated with you by emailing us at the address above.

This policy may be updated occasionally as the site changes.

← All bosses
Calvar'ion
Calvar'ion
Boss version
Calvar'ion Vet'ion (solo)
Kills per hour modifier
kills/hour

The Skull of Vet'ion takes about
12 hours and 7 minutes to obtain if you are exactly on droprate.

Expected kills
618
Expected kills on drop rate
Expected time to obtain
12h 7m
at 51 kills/hour (average)

The time to obtain Skull of Vet'ion at Calvar'ion, if you are exactly on drop rate, will be 17 hours and 10 minutes with beginner gear, 12 hours and 7 minutes with average gear and 10 hours and 18 minutes in max gear. That is about 618 kills on average.

Customize your estimated kills per hour above to see your own time to be on drop rate.

Additional information

During this grind you will also be making roughly 28,806,159 gp in total loot — about 2,377,207 gp per hour at 51 kills per hour. The biggest earner over that stretch is Dragon bones at about 3,404,987 gp.

Each kill has a 0.1618% chance at Skull of Vet'ion. Half of all players get it within 429 kills, 1,422 kills covers 90%, and 2,844 kills covers 99% — so going past 618 kills without one is unlucky, but not unusual.

Loot values use live Grand Exchange prices and shift with the market.

Loot from 618 kills

Loading prices…
Item Quantity Price (ea) Total value
Total loot value—

Report a bug

Protected by reCAPTCHA — Google's Privacy Policy and Terms apply.

✓
Bug successfully reported

Thank you for taking the time to report this — it genuinely helps make On Drop Rate better. We'll look into it, and get back to you by email if we need more detail.