How do I find a case's contents?

On any operator site, each case displays its contents with implied weights. On Rust Snowball, browse the /cases catalog — each case page lists every drop with its weight. For competitor cases, copy from their case detail page.

Why does my EV calculation differ from the operator's?

Either: (a) operator hides a weight you missed, (b) weights are normalised differently, (c) operator includes a "house take" cut on top of contents EV. Honest case operators publish full weights — those should reproduce exactly.

What's a "good" EV ratio?

Case EV across operators is typically 80-95% of case price (i.e. a 5-20% house edge). Rust Snowball calibrates every case to ~80% RTP (a 20% house edge) so the disclosed odds are consistent across the whole catalog.

Rust case EV calculator — expected value, house edge, RTP from contents

Rust case EV calculator

Calculate the exact expected value, house edge, and RTP of any Rust case by pasting its contents (value:weight pairs) and price. Works for Rust Snowball cases and any competitor case. Free, client-side, no signup.

Case contents — comma-separated value:weight pairs (e.g. 100:1200, 50:1150, ...)Case price ($)

Expected value: $22.40
House edge: 54.3%
RTP: 45.7%
Items: 12

Best drop: $100.00 (probability 12.00%). Worst drop: $0.01.

How the math works

Expected value of a case = sum of (item_value × item_probability) for every item, where item_probability = item_weight / total_weights. House edge = 1 - (EV / case_price). RTP = EV / case_price.

Honest case operators publish full per-item weights — these can be plugged into the calculator and should reproduce the operator's own claimed EV exactly. Discrepancies are either weight normalisation bugs (rare) or hidden house take (red flag).

Frequently asked questions

How do I find a case's contents?: On any operator site, each case displays its contents with implied weights. On Rust Snowball, browse the /cases catalog — each case page lists every drop with its weight. For competitor cases, copy from their case detail page.
Why does my EV calculation differ from the operator's?: Either: (a) operator hides a weight you missed, (b) weights are normalised differently, (c) operator includes a "house take" cut on top of contents EV. Honest case operators publish full weights — those should reproduce exactly.
What's a "good" EV ratio?: Case EV across operators is typically 80-95% of case price (i.e. a 5-20% house edge). Rust Snowball calibrates every case to ~80% RTP (a 20% house edge) so the disclosed odds are consistent across the whole catalog.

Ready to play?

Rust case EV calculator

Case contents — comma-separated value:weight pairs (e.g. 100:1200, 50:1150, ...)Case price ($)

Expected value: $22.40
House edge: 54.3%
RTP: 45.7%
Items: 12

Best drop: $100.00 (probability 12.00%). Worst drop: $0.01.

How the math works

Expected value of a case = sum of (item_value × item_probability) for every item, where item_probability = item_weight / total_weights. House edge = 1 - (EV / case_price). RTP = EV / case_price.

Frequently asked questions

How do I find a case's contents?: On any operator site, each case displays its contents with implied weights. On Rust Snowball, browse the /cases catalog — each case page lists every drop with its weight. For competitor cases, copy from their case detail page.
Why does my EV calculation differ from the operator's?: Either: (a) operator hides a weight you missed, (b) weights are normalised differently, (c) operator includes a "house take" cut on top of contents EV. Honest case operators publish full weights — those should reproduce exactly.
What's a "good" EV ratio?: Case EV across operators is typically 80-95% of case price (i.e. a 5-20% house edge). Rust Snowball calibrates every case to ~80% RTP (a 20% house edge) so the disclosed odds are consistent across the whole catalog.

Rust case EV calculator

How the math works

Related

Frequently asked questions

Ready to play?

Rust case EV calculator

How the math works

Related

Frequently asked questions

Ready to play?