Inflation Calculator
See how inflation erodes your purchasing power over time.
Enter values above to see results
How to use this calculator
Enter your assumptions above and review how projected outcomes change as you adjust contribution amount, rate of return, timeline, or withdrawal values. Testing conservative, moderate, and optimistic scenarios can help you understand a realistic range of possible results.
Start by using realistic estimates based on your personal situation. If unsure about expected returns, use historical average returns but recognize that past performance does not guarantee future results. You can experiment with different assumptions by changing one variable at a time and observing how each factor affects your outcome. This helps build intuition for how contributions, time horizon, and rate of return interact.
Assumptions and limitations
Calculator outputs are educational projections, not guarantees. Real outcomes can differ due to market volatility, inflation, taxes, fees, and personal circumstances. Use these estimates as planning support and combine them with broader research before making financial decisions.
This calculator assumes consistent investment behavior, reinvested returns, and doesn't account for withdrawals beyond those specified or emergency changes to your plan. For a personalized financial plan, consult with a qualified financial advisor who can review your complete situation. Our goal is educational—to help you understand the mechanics of compound growth and the impact of key variables on long-term wealth building.
See how inflation can affect purchasing power
An inflation calculator estimates how the purchasing power of money may change over time at a stated inflation rate. It helps distinguish between a balance that is larger in dollar terms and a balance that can actually buy more goods and services.
Inflation does not affect every household in exactly the same way. Housing, healthcare, education, food, and energy can move differently from a broad average. Use the calculator as a planning illustration and revisit the assumption when your expected spending pattern changes.
Formula and inputs
The purchasing-power relationship can be written as future real value = current amount divided by (1 + inflation rate) raised to the number of years. The calculation reverses the compounding effect of inflation to express a future amount in today’s dollars.
Enter a current amount, an annual inflation assumption, and a number of years. Run several rates, such as 2%, 3%, and 4%, to see how sensitive a long-term plan is to a small change in the assumption.
Worked planning example
If $10,000 is held for ten years while inflation averages 3% annually, its purchasing power is roughly equivalent to about $7,441 in today’s dollars. The cash balance may still read $10,000, but the goods and services it can buy may be fewer.
| Input or result | Example | What it means |
|---|---|---|
| Current amount | $10,000 | Today’s purchasing-power starting point |
| Inflation assumption | 3% annually | Illustrative annual price-growth rate |
| Time horizon | 10 years | Period over which inflation compounds |
| Estimated buying power | About $7,441 | Value expressed in today’s dollars |
| Scenario range | 2% to 4% | Shows sensitivity to the inflation assumption |
How to interpret the result
Compare the real-value result with the purpose of the money. Cash can be appropriate for short-term needs and emergency reserves, while longer-term goals may need a plan that considers both return potential and the risk of losing purchasing power.
Limitations to keep in mind
A single inflation rate is a simplification. Individual expenses can rise faster or slower than the broad measure, and the calculator does not account for taxes, investment returns, or the suitability of any particular asset class.
Use this tool to test assumptions, not to predict a guaranteed outcome. Financial markets, inflation, taxes, fees, account rules, and personal circumstances can change a real-world result. For decisions that depend on your full financial situation, consider speaking with a qualified professional.
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How Inflation Affects Your Money
Inflation is a change in the general price level over time. The rate entered here is an assumption; use official CPI data when you need a historical purchasing-power comparison.
What This Calculator Shows
Future Cost — How much today’s goods will cost in the future
Purchasing Power — What your current money will be worth in the future
Value Lost — The dollar amount lost to inflation
Example
At a constant assumed rate of 3% annual inflation, $100,000 would have purchasing power of about $74,409 after 10 years before taxes, fees, or changes in the inflation rate. This is a mathematical illustration, not a forecast or a claim that holding cash is always inappropriate.
How to Beat Inflation
Do not assume any asset will outpace inflation. Compare diversified options, liquidity, taxes, fees, and risk; Treasury Inflation-Protected Securities (TIPS) are one option to research, not a universal recommendation.
Sources and assumptions
The examples on this page are mathematical illustrations based on the inputs shown. Results are not forecasts or guarantees; fees, taxes, inflation, market changes, timing, and personal circumstances can materially change real outcomes.