1920 Money to 2018 Calculator
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Reviewed by Calculator Editorial Team
This calculator converts historical amounts from 1920 to their equivalent values in 2018, accounting for inflation. Simply enter the amount from 1920 and the calculator will show you how much that amount would be worth today.
How to Use This Calculator
Using the 1920 to 2018 money calculator is simple:
- Enter the amount from 1920 that you want to convert in the "1920 Amount" field.
- Click the "Calculate" button to see the equivalent value in 2018 dollars.
- Review the result and the inflation adjustment details.
- Use the "Reset" button to clear the form and start over.
The calculator uses the Consumer Price Index (CPI) to determine the inflation adjustment factor. The CPI measures changes in the price level of a basket of consumer goods and services over time.
How Inflation Adjustment Works
Inflation adjustment converts historical monetary values to their equivalent values in current dollars, accounting for the purchasing power of money over time. The formula used is:
Inflation Adjustment Formula
Adjusted Amount = (Original Amount × CPI 2018) ÷ CPI 1920
Where:
- Original Amount = The amount from 1920 you want to convert
- CPI 1920 = Consumer Price Index for 1920 (19.5)
- CPI 2018 = Consumer Price Index for 2018 (254.67)
The Consumer Price Index (CPI) is a measure that examines the weighted average of prices of a basket of consumer goods and services, such as transportation, food, and medical care. It is calculated by taking price changes for each item in the predetermined basket of goods and averaging them.
By comparing the CPI of one year to another, you can determine the rate of inflation for a given period. This allows you to adjust historical monetary values to reflect the purchasing power of money over time.
Example Calculation
Let's say you have $100 from 1920 that you want to know the equivalent value in 2018 dollars.
Example
Original Amount: $100 (1920)
CPI 1920: 19.5
CPI 2018: 254.67
Adjusted Amount = ($100 × 254.67) ÷ 19.5 = $1,305.47
This means that $100 from 1920 would be worth approximately $1,305.47 in 2018 dollars, accounting for inflation.
| Year | CPI | 1920 $100 Value |
|---|---|---|
| 1920 | 19.5 | $100.00 |
| 1950 | 26.9 | $107.56 |
| 1980 | 82.4 | $412.00 |
| 2018 | 254.67 | $1,305.47 |
This table shows how the purchasing power of $100 from 1920 has changed over time due to inflation.
Frequently Asked Questions
What is the Consumer Price Index (CPI)?
The Consumer Price Index (CPI) is a measure that examines the weighted average of prices of a basket of consumer goods and services, such as transportation, food, and medical care. It is calculated by taking price changes for each item in the predetermined basket of goods and averaging them.
How does inflation adjustment work?
Inflation adjustment converts historical monetary values to their equivalent values in current dollars, accounting for the purchasing power of money over time. The formula used is: Adjusted Amount = (Original Amount × CPI 2018) ÷ CPI 1920.
Why is inflation adjustment important?
Inflation adjustment is important because it allows you to compare the value of money over time. It helps you understand how much more (or less) you would need to spend today to have the same purchasing power as you did in the past.
What are the limitations of inflation adjustment?
Inflation adjustment has some limitations. It assumes that the basket of goods and services remains the same over time, which may not be accurate. It also doesn't account for changes in the composition of the economy, such as the rise of new industries or the decline of others.