Inflation Calculator (2026)
Estimate how a constant annual inflation assumption could change future costs and purchasing power. This scenario tool does not look up historical ABS CPI.
Future equivalent = Amount × (1 + Annual rate / 100)ⁿInputs
Starting amount for the scenario
Length of the assumed inflation scenario
Your constant annual assumption, not an ABS CPI lookup
$134,392.00
Cumulative Assumed Price Increase
34.39%
Additional Dollars Required
$34,392.00
Save and compare scenarios
Save up to five snapshots in this browser. They are not synced across devices. Shared links contain your inputs: anyone receiving the link can read them.
Indicative estimates based on the inputs shown and calculator assumptions at the time saved. Results may change when rules or methods are updated. General information only, not a quote, approval or recommendation. See the methodology and source notes on this page. CSV exports include their export timestamp.
How this inflation estimate works
The calculation multiplies the starting amount by (1 + annual rate / 100) raised to the number of years. It applies the same rate throughout, including proportional compounding for a part-year input. Dollar results are rounded to the nearest dollar.
For example, $100,000 at an assumed 3% a year for 10 years becomes about $134,392. The additional $34,392 is the extra money needed to match the modelled cost, not the amount of purchasing power lost in starting-year dollars.
A zero-year period or a 0% rate leaves the starting amount unchanged. The 3% default is an illustration, not a forecast or a current CPI observation. This tool models non-negative inflation; it does not model deflation.
For a historical Australian comparison, use the RBA inflation calculator and the ABS Consumer Price Index. Those sources use observed price data. A constant-rate scenario cannot establish a historical cost change or predict house prices.
General information only, based on your assumptions. This is not a forecast or financial advice. Last reviewed: 5 September 2026.
Calculator guide
What this inflation calculator answers
Test how one constant annual inflation assumption compounds over time. The result is a planning scenario, not a historical CPI conversion or a forecast of future prices.
- What could an amount cost after a chosen period?
- How much purchasing power could be lost at the assumed rate?
- How does compounding change the cumulative increase?
Next steps
