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FINANCE CALCULATOR

Inflation Calculator

Estimate future costs and purchasing power using an annual inflation assumption.

Calculator

%
years
YOUR RESULTS
Future cost of the same purchase14,802.44
Purchasing power of a fixed amount today
6,755.64
Cumulative price change
48.0244%
Starting amount
10,000.00

Cost and purchasing power by year

Amounts use the same currency as your inputs.

Future costPurchasing power of fixed cash
07.4K14.8K12345678910Year

Year 10

Future cost
14,802.44
Purchasing power of fixed cash
6,755.64

Select a year to inspect its values.

Inflation scenario by year
Inflation scenario by year
YearFuture costPurchasing power of fixed cash
110,400.009,615.38
210,816.009,245.56
311,248.648,889.96
411,698.598,548.04
512,166.538,219.27
612,653.197,903.15
713,159.327,599.18
813,685.697,306.90
914,233.127,025.87
1014,802.446,755.64

Understanding your result

Future cost tells you how much nominal money would buy the same item after the entered period. Purchasing power tells you what the original, unchanged cash amount would buy then, expressed in today’s money.

Once you have estimated a future purchase price, enter it into the Savings Goal Calculator to calculate the monthly contribution required to fund it.

The formula

Future cost = amount × (1 + i)^t. Purchasing power of fixed cash = amount ÷ (1 + i)^t.

i is the assumed annual inflation rate as a decimal and t is the number of years. This is a forward scenario using a constant rate, not a historical CPI lookup. A negative rate models deflation; zero leaves both amounts unchanged.

Two years at 10% inflation

An item costing 100 today costs 121 after two years of 10% annual inflation. If you keep only 100 in non-interest-bearing cash, its buying power then is about 82.64 in today’s money. The cumulative price increase is 21%, not 20%.

How to use this calculator

  1. Enter the current price or amount you want to examine.
  2. Supply your own annual inflation assumption and number of years.
  3. Use future cost as a target price, or purchasing power to assess unchanged cash.

Choose an assumption for the expense

The price of one expense can change differently from a broad consumer-price index. Tuition, rent, medical care, and a specific product may not follow the same path. For a particular goal, test a range of assumptions rather than treating one headline inflation figure as a forecast.

A nominal increase and a purchasing-power decline use different bases. A 25% rise in prices means fixed cash buys 20% less, because purchasing power is the reciprocal of the price factor. The two percentages need not be equal.

Assumptions & limitations

What this calculation assumes

  • The same inflation rate applies every year.
  • The quantity and quality of the purchase stay comparable.
  • The fixed-cash comparison earns no interest.

What to keep in mind

  • No live or historical inflation data is loaded.
  • Taxes, investment returns, exchange rates, and changing spending patterns are outside this calculation.

Common questions

Can I compare historical years?

Not with this tool. Historical purchasing-power comparisons require the appropriate price-index values for the dates and country concerned.

Does my money lose its face value?

No. Inflation changes what a fixed nominal amount can buy. The number printed on the money does not change.

Sources & further reading