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TheFinancePlans
Global tool · works in every currency

Inflation Value Calculator

Convert money between any two years using real historical CPI. See what a past amount is worth today, what today's money will need to become, and how much buying power you lose.

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Default inflation rate for Other: 3.0% per year, based on long-run global CPI averages data (2026). You can override it in each calculator’s advanced options. See data sources for full citations.

How We Work It Out

Money is converted between two years using compound inflation, never simple inflation:

When both years have CPI data (measured):
Value(to) = Value(from) × CPI(to) / CPI(from)
Otherwise, with an assumed annual rate i:
FV = PV × (1 + i)n  and  PV = FV / (1 + i)n

Where n = number of years between the two points and i = the annual inflation rate. The CPI ratio is preferred because it reflects the inflation that actually occurred rather than a flat assumption.

Real-World Examples

Past → Today: $10,000 from 2010

Using measured US CPI, $10,000 in 2010 has the same purchasing power as about $14,400 today, prices rose roughly 1.44x over that period.

Today → Future: $100,000 at 6%

If inflation averages 6%, $100,000 today will need to grow to about $179,085 in 10 years just to buy the same things, and an un-raised income would feel like only $55,840.

Frequently Asked Questions (FAQ)