A ten-week trip to Europe for two people cost $9,000 in total. Spread over 70 days, that is about $64 per person per day covering flights, lodging, meals, activities, and ground transport combined. The number only holds because each of those categories was counted before departure instead of reconstructed afterward.

Turn the total into a rate before you plan anything: $9,000 divided by 2 travellers gives $4,500 per person; $4,500 divided by 70 days gives roughly $64 per person per day. A daily rate is easier to test against real prices than a lump sum, because you can compare it with a hostel bed, a supermarket dinner, or a train ticket the moment you see one.

Separate costs that scale with the group from costs that do not

Two cost types behave differently as the group grows. Accommodation and car rental are charged per room or per vehicle, so a group of four can roughly halve the per-person share of those lines compared with a group of two. Flights and meals are charged per person, so a larger group does not reduce them at all. Estimate the two types separately, or the group discount on one line will get applied on paper to another where it does not exist.

List every category before you put numbers in it

A working budget has at least these lines:

  • Flights, including seat selection and checked-bag fees
  • Lodging, priced per night for the exact number of nights
  • Meals, split into self-catered and restaurant days
  • Activities, including entry fees and guided tours
  • Ground transport: trains, buses, metro passes, fuel, tolls, parking
  • Visas and entry fees
  • Travel insurance
  • Airport transfers
  • ATM and foreign transaction fees
  • Laundry, phone data, and small sundries

The last five lines are the ones most often left out, and they are the reason a budget that looked balanced at home runs short in the second half of a trip.

Add a contingency of 10 to 15 percent on top of the estimate. The buffer covers a missed connection, a fare that rose between planning and booking, or an unplanned extra night, without forcing you to cut the rest of the trip to absorb it.

Estimate before you commit

A free travel budget calculator takes the traveller count, the trip length, and your per-category estimates, then returns a running total. Enter the categories above one at a time so you can see which line is driving the number. If lodging is half the total, shortening the trip by a week or shifting to a cheaper area changes the result far more than trimming meals will.

Plan the itinerary after the budget

A DIY trip planning guide sets out three steps: research attractions, plan meals, and pack efficiently. Each one has a budget consequence, so treat them as cost decisions rather than scheduling decisions.

Research attractions by opening days and ticket prices together, so you can alternate paid sites with free ones instead of discovering on arrival that three paid sites landed in the same week.

Plan meals by deciding in advance how many days will be self-catered. This is the most adjustable line in the budget, and the same trip can be eaten at very different daily costs depending on that split.

Pack to a carry-on where you can. It avoids checked-bag fees on the flight and removes the cost of replacing a bag that arrives late.

Choosing a destination

Lonely Planet highlights Sardinia for its turquoise waters, ancient Nuragic fortresses, and its food. Those three attractions map onto three budget lines, and each one behaves differently.

Coastal scenery is the lodging driver: staying near the water costs more per night than staying inland and travelling to the coast for the day. The Nuragic fortresses are the activity driver, and they are mostly ticketed sites, so cluster them into one or two days rather than paying entry repeatedly. The food is the meals driver, and it is the line you have the most control over by choosing how many meals are restaurant meals.

Sardinia is an island, so getting there adds a flight or ferry leg to the transport category. Price that leg before you compare the island with a mainland destination, because the extra leg can raise the total even when daily costs on the island are lower.