Vacation Budget Calculator
A trip budget is two shapes of money: costs that happen once, like the flights and the car, and costs that scale with the nights and the days. Enter the travellers, the days and nights, the daily spending per person and the fixed lines, add a contingency, and the whole thing comes back broken down with the cost per person per day on top. That per-day figure is the one worth carrying away, because it stays comparable between a long cheap trip and a short expensive one. A second tab runs it backwards and tells you what daily spending money a fixed budget actually leaves.