Back In The Day

Back In The Day

US Inflation Calculator

147 ratings
63 reviews
Free

Details

  • Released
  • Updated
  • May 8, 2014
  • January 26, 2026

Features

Back In The Day screenshot #1 for iPhone
Back In The Day screenshot #2 for iPhone
Back In The Day screenshot #3 for iPhone
Back In The Day screenshot #4 for iPhone
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About

Calculate historical US inflation to understand the purchasing power of money across different decades. Easily convert past amounts to today's dollars or vice versa.

US inflation calculation
Convert past to present value
Convert present to past value
Easy to use interface
Historical currency comparison
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What's New in Back In The Day

3.6.0

January 26, 2026

2026 CPI data added

User reviews

App works great, visually noisy user interface

I needed to do a bunch of dollar amount conversions over different years. Every time I changed a year, the keyboard would dismiss, the spinners, and the text field would move around under my fingers, making it difficult to re-orient myself and figure out what’s going on. And then when I enter entered a dollar value, the keyboard would appear and then compact the UI. It would be a much more pleasant experience if the keyboard were always present, and the user interface was rock stable while doing several conversions that’s spanned several years
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Super useful

This app is very useful for me anytime and older man calls newer generations lazy and I can show them how much more expensive things actually are.

Seems good

Give the formula and percentage

Intuitive

Easy to use. You can enter any number and the results show for the chosen years. It works going backwards in time, as well. Love it!

Gets the job done

Simple, easy to use

Developer apps

FAQ

What does the Back In The Day app do?

This app functions as a US inflation calculator. It allows you to determine the equivalent value of money from different historical periods in today's dollars, or conversely, what a present-day amount would have been worth in the past.

How do I use the inflation calculator?

Using the app is straightforward. You simply enter the monetary amount you wish to convert and the specific years you want to compare. The calculator will then display the calculated value.

Is this app free to use?

Yes, the app is completely free to use. There are no costs associated with downloading or utilizing its inflation calculation features.

What kind of historical comparisons can I make?

You can compare amounts across various decades in US history. For example, you can find out how much a certain amount from the 1920s would be worth today, or what $100 today would have purchased in earlier times.