If you're worried your day might be boring, explore all the interesting — and deeply improbable — things that could happen instead. Describe your plans, a scenario, or (if you're a writer stuck on a scene) the situation your characters are in. The calculator generates 15 events across five probability tiers: from the boringly inevitable to the cosmically absurd. Each comes with precise pseudo-scientific odds. Named in affectionate tribute to Douglas Adams, who knew that the universe is not only stranger than we suppose, but stranger than we can suppose.
Be specific — the more detail you give, the more delightfully specific the results.