Write down the basics of your trip. This includes how many people are traveling, how you plan to travel (i.e. car, plane, train), how many nights you will need lodging, how many days you will need a rental car (if applicable). Jot down sites you will be visiting and note if you will opt for travel insurance. If you are driving, write down the final destination and any stops in between.
Get on your computer or call a travel agent and estimate the cost of tickets, how many miles you will drive, if driving and how much gas you will need to cover your trip. Use sites like Travelocity.com, Expedia.com or Mapquest.com to help with your estimates. If you are traveling in the future, assume that gas will be a bit more expensive. If you are traveling by plane, don't forget baggage fees and airport parking.
Calculate how much you plan to spend on food per day. You may be traveling alone and are okay with deli sandwiches and quick eats. Alternatively, you may be staying with your in-laws who like to do all the cooking. Do not forget drinks, taxes and tips if you will be eating out.
Make a list of anticipated extras (and there will always be extras). List any souvenirs you may want to buy, supplies you will need to pick up or events you will be attending that will cost money (i.e. Disneyland or a concert). Always add on extra for emergencies or unexpected expenses.
Get out the calculator and start adding. Always lean towards the higher side of things, particularly if you are rounding numbers out. If you are unsure of how many days you will be traveling, calculate the maximum amount of time so that there are no surprises. There are online programs to help you calculate costs, so use the Internet to your advantage, see Resources for information on these services. Once you have an idea of the total cost, you should be able to enjoy your trip without the worry.
