Two days in Zagreb covers the free version of the city almost completely: Upper Town’s hilltop sights cost nothing to look at, Dolac Market costs nothing to browse, and Lower Town’s green-horseshoe parks and Mirogoj Cemetery are free to walk. Budget roughly EUR 20-40 a day for transit, food and the one museum ticket worth paying for, and skip a rental car entirely; the ZET tram network and a one-minute funicular ride cover everything a car would.

Three days is the sweet spot for Zagreb on a budget: two days cover the free version of the city almost completely, and the third buys you a cheap day trip instead of a third day of diminishing-returns sightseeing. Expect to spend roughly EUR 58-100 total across the three days for transit, food, one museum ticket and a Samobor bus fare, before lodging. Croatia has used the euro since 1 January 2023, not the kuna, and Zagreb sits inland in the country’s continental north, nowhere near the Adriatic coast.

Six days is enough to do Zagreb properly and still leave the city, because Zagreb itself is genuinely a 2-3 day stop, not a week of daily must-sees. Spend the first two days on the free-and-cheap Upper and Lower Town core, then use the other four for cheap day trips by public bus: Samobor for kremsnita, Plitvice Lakes for the waterfalls (the one genuinely expensive ticket on this whole trip), Varazdin for baroque architecture, and a Zagorje day combining Trakoscan Castle with the Krapina Neanderthal Museum.

Seven days is more than Zagreb itself needs. The city is genuinely a 2-3 day stop, so the other five days here are cheap public-transport day trips, not padding. Spend Days 1-2 on the free Upper and Lower Town core, then use Days 3-7 for bus and train trips to Samobor, Plitvice Lakes, Varazdin and the Zagorje castles, plus one honest fork on Day 7: a pricier coast stretch or a slower, cheaper repeat day.

Zagreb on a Budget: 9 Cheap and Free Things to Do Zagreb is the capital of Croatia, sitting inland in the continental north, not on the Adriatic coast that most Croatia trips chase. That geography is good news for a budget visit: no beach markup, a compact walkable core, and a currency that’s been the euro since 1 January 2023 (the old kuna is retired, so don’t budget for it). Croatia is also in Schengen, meaning no routine border check arriving from most of the EU; a separate EU entry system called ETIAS has been announced but wasn’t yet in force as of mid-2026, so check travel-europe.