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# U.S. inflation rate in 1910: 4.40%

### Inflation in 1910 and Its Effect on Dollar Value

Purchasing power decreased by 4.40% in 1910 compared to 1909. On average, you would have to spend 4.40% more money in 1910 than in 1909 for the same item.

In other words, \$1 in 1909 is equivalent in purchasing power to about \$1.04 in 1910.

The 1909 inflation rate was -1.09%. The inflation rate in 1910 was 4.40%. The 1910 inflation rate is higher compared to the average inflation rate of 3.07% per year between 1910 and 2019.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1910 was 9.50. It was 9.10 in the previous year, 1909. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation.

 Average inflation rate 4.40% Converted amount (\$1 base) \$1.04 Price difference (\$1 base) \$0.04 CPI in 1909 9.100 CPI in 1910 9.500 Inflation in 1909 -1.09% Inflation in 1910 4.40%

### Inflation by Country

Inflation can also vary widely by country. For comparison, in the UK £1.00 in 1909 would be equivalent to £1.01 in 1910, an absolute change of £0.01 and a cumulative change of 1.05%.

Compare these numbers to the US's overall absolute change of \$0.04 and total percent change of 4.40%.

### Inflation by Spending Category

CPI is the weighted combination of many categories of spending that are tracked by the government. This chart shows the average rate of inflation for select CPI categories between 1909 and 1910.

Compare these values to the overall average of 4.40% per year:

Category Avg Inflation (%) Total Inflation (%) \$1 in 1909 → 1910
Food 0.00 0.00 1.00
Shelter 0.00 0.00 1.00
Energy 0.00 0.00 1.00
Apparel 0.00 0.00 1.00
New vehicles 0.00 0.00 1.00
Used cars and trucks 0.00 0.00 1.00
Transportation services 0.00 0.00 1.00
Medical care services 0.00 0.00 1.00
Medical care commodities 0.00 0.00 1.00

It's important to note that not all categories may be tracked since 1909. This table and visualization use the earliest available data for each category.

### How to Calculate Inflation Rate for \$1, 1909 to 1910

This inflation calculator uses the following inflation rate formula:

CPI in 1910CPI in 1909
×
1909 USD value
=
1910 USD value

Then plug in historical CPI values. The U.S. CPI was 9.1 in the year 1909 and 9.5 in 1910:

9.59.1
×
\$1
=
\$1.04

\$1 in 1909 has the same "purchasing power" or "buying power" as \$1.04 in 1910.

To get the total inflation rate for the 1 years between 1909 and 1910, we use the following formula:

CPI in 1910 - CPI in 1909CPI in 1909
×
100
=
Cumulative inflation rate (1 years)

Plugging in the values to this equation, we get:

9.5 - 9.19.1
×
100
=
4%

### Comparison to S&P 500 Index

To help put this inflation into perspective, if we had invested \$1 in the S&P 500 index in 1909, our investment would be nominally worth approximately \$1.12 in 1910. This is a return on investment of 12.20%, with an absolute return of \$0.12.

These numbers are not inflation adjusted, so they are considered nominal. In order to evaluate the real return on our investment, we must calculate the return with inflation taken into account.

The compounding effect of inflation would account for 4.21% of returns (\$0.01) during this period. This means the inflation-adjusted real return of our \$1 investment is \$0.12.

Investment in S&P 500 Index, 1909-1910
Original Amount Final Amount Change
Nominal \$1 \$1.12 12.20%
Real
\$1 \$0.12 11.68%

Politics and news often influence economic performance. Here's what was happening at the time:

• Russia invades Persia in support of Mohammed Ali Shah's coup d'etat against the Persian Government.
• News that Robert Peary has discovered the North Pole reaches the world 5 months after the discovery took place.
• Leo Baekeland of Yonkers New York patents the process of thermosetting plastic.

### Data Source & Citation

Raw data for these calculations comes from the Bureau of Labor Statistics' (CPI), established in 1913. Inflation data from 1665 to 1912 is sourced from a historical study conducted by political science professor Robert Sahr at Oregon State University.

You may use the following MLA citation for this page: “Inflation Rate in 1910 | Inflation Calculator.” U.S. Official Inflation Data, Alioth Finance, 23 Oct. 2019, https://www.officialdata.org/inflation-rate-in-1910.