Sweden: 25 statutory leave days and no statutory overtime premium at all
Sweden pairs two facts that sound contradictory. The Semesterlagen guarantees 25 days of annual leave, five weeks, among the most generous statutory entitlements anywhere. Whether all of them are paid is a separate question in your first year: paid days are earned over a qualifying year running from April to March, so a new starter has the time off without necessarily having earned the pay for every day of it. And the Arbetstidslagen, which fixes ordinary working time at 40 hours a week, attaches no premium whatsoever to the hours beyond it. There is no Swedish equivalent of time and a half in law.
That is less alarming than it reads, because Swedish law deliberately leaves pay to the kollektivavtal. Around nine in ten Swedish employees are covered by a collective agreement, and those agreements set the overtime supplements, typically stepped by time of day and day of week rather than by a single multiplier. "No statutory premium" here almost never means "no premium"; it means the number is in your union agreement rather than in the statute, and this calculator cannot know which agreement covers you.
Public holidays sit in the same place. They are not separately guaranteed as paid time off by statute, but most fall on days the collective agreement covers, so the eleven counted here are an indicative figure rather than a legal entitlement.
The upshot is that a Swedish salary spreads over about 2,080 paid hours but only around 1,792 worked ones once five weeks of leave and the holidays come out, lifting the rate per hour actually worked by roughly a sixth over the headline figure.