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The carry-on-versus-checked decision looks like a packing question but it is really a cost question with two sides: the $30-40 checked fee airlines now charge per bag each way, and the one-off $100-200 price of a decent 40L carry-on that removes those fees for years. This calculator puts both on the table — your yearly checked-bag spend, the months it takes a carry-on bag to pay for itself, and the roughly 20-30 minutes per flight that carry-on travellers get back at check-in and the carousel. The verdict is honest about when checked bags still win: genuinely heavy or bulky trips.
Put a real dollar figure on the carry-on-versus-checked decision — yearly checked-bag fees, the one-off cost of a good carry-on bag, and the time you get back at every airport.
Almost all airlines include one carry-on in the base fare, while most now charge for checked bags — but size and weight limits vary, so measure your bag against your airline's published limits before relying on it.
A 35-45L bag that fits your main airline's limits, with decent wheels or straps — roughly $100-200 once. It replaces years of $35-per-bag fees, which is the whole arithmetic here.
When you genuinely need more than about 7-10kg — ski gear, musical instruments, liquids over 100ml, or long trips without laundry access. The calculator is honest that the fee maths is only half the story.
Every tool answers instantly from our own knowledge and calculators. Want the deeper, personalised version? Each has a $2.95 full report.