- Enter the amount in today’s money.
- Choose a period and annual inflation assumption.
- Compare purchasing power today with the future equivalent; try a second inflation rate.
Inflation calculator
See how a constant inflation assumption changes purchasing power and the future amount equivalent to today’s money. Free, without registration.
Starting values are an example. Replace them with your own.
Amount currency, without conversion
Purchasing power today$8,219.27
Future equivalent amount$12,166.53
Difference$1,780.73
Method and limitations
Purchasing power = amount / (1 + inflation)^years. The inflation rate is your constant assumption, not a live national statistic.
How to use this calculator
How the calculation works
Purchasing power = amount / (1 + inflation)^years. The inflation rate is your constant assumption, not a live national statistic.
How to read the result
Purchasing power discounts the entered amount to today’s money. The future equivalent answers a different question: how many future units would match the entered amount today. The model compounds inflation rather than adding the same percentage each year.
What you can do here
Change one input at a time and compare the result immediately. The calculation runs in your browser, with assumptions and limitations below the form. Default values are examples, not recommendations or live market data.
To compare a recurring investment contribution with income and payment dates, open the DCA budget planner.
Frequently asked questions
What does this calculator show?
See how a constant inflation assumption changes purchasing power and the future amount equivalent to today’s money.
Is the inflation rate a current official statistic?
No. You enter a constant scenario rate. The calculator does not fetch national CPI data or measure your personal spending basket.
Can the rate be negative?
Yes, within the field’s supported range. This models constant deflation, not a forecast that prices will fall.
Do I need an account or payment to calculate?
No. All fields and results are free. You can change inputs and compare scenarios without an account. An account is only needed for synchronising a plan in the dashboard.