The inflation calculator shows you how rising prices erode the real value of money over time — and how much more you'll need in the future to maintain today's standard of living. Essential for retirement planning, salary negotiation, and understanding long-term financial decisions.
Enter any dollar amount, the expected annual inflation rate, and the number of years. The calculator shows the equivalent future value needed to maintain the same purchasing power, and the real value of future money in today's terms.
Historical US inflation has averaged ~3% annually (2.7% over the past 50 years). Recent years saw peaks above 8% in 2022. For long-term planning, use 2.5–3% as a reasonable estimate.
Reach for this tool whenever a financial decision hinges on this type of calculation. Small differences in rate or term become large differences in total cost or return over multi-year horizons — differences that only become visible when you run the actual numbers.
A frequent error is using annual rates where monthly rates are required (or vice versa). Simply dividing an annual rate by 12 is only an approximation — the correct conversion for compound calculations uses the (1 + r)^(1/12) − 1 formula.
A first-time buyer models three scenarios before making an offer: 10%, 15%, and 20% deposit on a £280,000 property. The calculator shows exactly how the monthly payment and total interest cost change with each deposit level, making the decision visible rather than speculative.
Inflation/Purchasing Power Formulas
Future Value = Present Value × (1 + rate)^years
Present Value = Future Value ÷ (1 + rate)^years
At 3% inflation:
You plan to need $4,000/month in retirement in today's dollars. Retirement is 25 years away. Expected inflation: 3%.
Result: You'll need $8,375/month in 25 years to equal today's $4,000 purchasing power
Inflation is the rate at which the general price level of goods and services rises, reducing the purchasing power of money over time.
At 3% inflation,
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