Inflation Calculator | Future Cost and Purchasing Power
Estimate future equivalent cost, price increase, and remaining purchasing power from an amount, inflation rate, and number of years.
Inflation Estimate
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Estimate Future Cost After Inflation
Enter an amount, annual inflation rate, and number of years to estimate future equivalent cost and how purchasing power changes over time.
Inflation Is an Assumption, Not a Promise
Actual inflation varies by country, category, currency, and year. Food, rent, tuition, energy, and healthcare may rise differently from a single average rate.
About This Tool
Inflation Calculator shows how the purchasing power of money changes over time using Consumer Price Index data. It answers questions like what £100 in 1990 is worth in today's money, or how much today's prices will cost in future.
When to Use It
Use this when comparing salaries or prices across different years, when evaluating whether a pay rise has kept pace with inflation, or when converting historical financial figures for a report.
How to Use
- Enter the amount and the starting year.
- Enter the target year.
- Click Calculate to see the inflation-adjusted equivalent.
- Review the cumulative inflation percentage over the period.
Frequently Asked Questions
What does it mean when inflation erodes purchasing power?
If inflation is 3 percent per year, each pound buys 3 percent less each year. After 24 years at that rate, you need twice as much money to buy the same goods.
Which inflation index does the calculator use?
The calculator uses the Consumer Price Index which tracks a basket of everyday goods and services. RPI or PCE indices may give slightly different results.
Can I calculate future prices?
Yes. Enter a future year and the calculator projects forward using the average inflation rate from the historical data period selected.