Cost of Living: How to Calculate, Compare, and Rank

How to Compare the Cost of Living Around the World

The cost of living is how much you pay for housing, gas, food, clothing, and other everyday items. It is a useful measurement that allows you to compare expenses between locations and over time.

Many sources estimate the cost of living for you. It's important to keep in mind that it's an index, so your particular expenses might be higher or lower. For example, gas would cost more if you have a Hummer vs. a Prius.

But these cost of living estimates are useful tools for comparison.

How It's Calculated

Agencies calculate the cost of living by finding prices for a representative sample of goods and services. They then take into account how much of a person's budget would be consumed by the item in a year. For example, one gallon of milk might not cost much compared to a dress, but over a year, it would cost much more. Therefore, the price for each item is weighted to account for its importance to a typical family's budget.

A more thorough example is the Federal government's official measurement of inflation, the Consumer Price Index. The Labor Department measures prices of 80,000 goods and services from 23,000 retail and service businesses. It then weights the items according to how they are used by a sample of 14,500 families. The CPI excludes income taxes but includes sales taxes.

Cost of Living Comparison

Most cost-of-living calculators give you a direct dollar-for-dollar comparison between your location and another.

You plug in your salary, and they tell you what you would need to earn to have the same standard of living in the new location. Many also say what it costs for various categories, such as housing, food, and gas. Keep in mind these are estimates based on samples, so your cost of living may be significantly different.

Cost of Living Index

The cost-of-living index gives you the percentage difference in the cost of living between your location and another. It's particularly useful to compare international locations because it compensates for exchange rate differences. Since it's an index, the cost of living in your area is always 100. If the place you're comparing it to is greater than 100, it's more expensive to live there. If it's less than 100, it's cheaper. The difference is the percent more or less it will cost you. For example, if it's 120, then it's 20 percent more expensive.

U.S. Cost of Living Calculators

Here are some of the most accurate calculators for the United States:

• Bankrate - Breaks out specific items like housing, doctors' visits, and dry cleaning.
• Money CNN - Breaks out relative costs by categories.
• Consumer Price Index - Compare the cost of living between any time periods, between 5 major U.S. cities, and four regions.

The U.S. Department of State also offers links to a variety of resources to help you determine the best place for you to live. The best one is its article on Salaries, Costs of Living, and Relocation.

Cost of Living Calculator International

The Economist Intelligence Unit provides a cost of living calculator between cities around the world.

It takes into account the relative cost of most goods and services. For more, see How the Index Is Calculated. To use the calculator, go to Worldwide Cost of Living Calculator. It does cost a fee.

Just looking at the cost of living doesn't tell you how easy it is to live in the city. Many factors, such as pollution or crime, don't necessarily create an immediate expense. They could make the city harder to enjoy. Therefore, the EIU also provides a Global Liveability Report.

The EIU's index is the most thoroughly researched, but it's expensive. For less costly, but less accurate, comparisons see these sites:

• Expatistan - Quick comparison between cities, but data is submitted by visitors so could, therefore, be suspect.
• Numbeo - Also volunteer data-source. Provides more info on quality of life. Must register to use.
• U.S. State Department - Provides a quick calculator for per diem rates in cities throughout the world. Gives you a good comparison of relative costs in dollars.

Highest Cost of Living

These are the top 10 most expensive cities in the world, compared to New York (highest cost first.)

1. Luanda, Angola
2. Hong Kong
3. Zurich, Switzerland
4. Singapore
5. Geneva, Switzerland
6. Shanghai, China
7. Beijing, China
8. Seoul, South Korea
9. Bern, Switzerland

Lowest Cost of Living

The ten least expensive cities in the world are, starting with the lowest cost:

1. Tbilisi, Georgia
2. Managua, Nicaragua
3. Cape Town, South Africa
4. Minsk, Belarus
5. Banjul, Gambia
6. Skopje, Macedonia
7. Tunis, Tunisia
8. Karachi, Pakistan
9. Windhoek, Namibia
10. Bishkek, Kyrgyzstan  (Source: Mercer 2015 Cost of Living Rankings)