About the Past Value Calculator
What a present amount would have been worth in an earlier year, deflated by average inflation.
Also known as: historical value of money, deflate price, value in the past.
How to use this calculator
- Enter amount today, average inflation, years ago.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Past value = amount ÷ (1 + i)ⁿ
Worked example
Using the values pre-filled in the calculator above:
- Amount today = 1,000
- Average inflation = 3 %
- Years ago = 20
the calculator returns:
- Equivalent past amount: 553.68