Winter bathing in the Øresund: 1 in 1.3 million chance it kills you

~0.8 micromorts. 8 micromorts. Like 8 flights, or taking the train 8,000 km. Estimate.

Mortmeter: Worth it. Freezing your soul off for a dopamine hit is Scandinavian tradition at bargain-basement odds.

Assuming: One sober winter dip lasting 1 to 2 minutes using a bathing ladder or beach.

How we got this: Deliberate winter dipping carries an acute mortality risk of roughly 0.8 micromorts per plunge, mostly driven by sudden cold shock rather than hypothermia. Danish bathing club statistics indicate fatalities are exceptionally rare among sober participants. 1 dip x 0.8 micromorts = 0.8 micromorts.

What gets you: Cold shock response triggering sudden cardiac arrhythmia, Involuntary gasp reflex causing immediate water aspiration, Slips and blunt trauma on icy wooden piers or rocks.

Cheaper version: Ease down a ladder rather than jumping headfirst to reduce cold-shock reflex by roughly 75%.

Sources and method: how Mortmeter prices things, and the Atlas of measured risks.

More priced risks: Sharing a bottle of Flor de Pingus, Riding Polyppen at Bakken in Denmark, Eating 2 whole pizzas, Drinking a bottle of red wine, A week of off-piste skiing, Getting LASIK eye surgery, Texting while driving on the motorway, Cage diving with great white sharks.