$100 at 3% for 10 years
- Present buying power
- $74.41
- Increase
- $34.39
- Multiplier
- 1.3439163793x
Inflation Calculator
Use this free inflation calculator to estimate future cost and present buying power from an amount, annual inflation rate, and number of years.
Estimate, not advicePayment or total shownExample inputsTab-only history
Formula steps
- Convert 3% to an annual multiplier.
- Raise the multiplier to 10 years.
- Multiply the amount by the multiplier for future cost.
- Divide the amount by the multiplier for present buying power.
Examples
Recent answers
Recent inflation estimates will appear here.
Inflation estimates use your chosen rate and do not look up historical CPI or specific product prices.
Inputs and recent answers stay in this browser tab and are not sent to a server.
How to use the Inflation Calculator
- Enter the requested dollar amounts, rates, terms, tax settings, or contribution details.
- Use rates as percentages, such as 6.5 for 6.5%, and check whether a field asks for a monthly or annual amount.
- Press the calculate button to see the answer, supporting metrics, and formula steps.
- Use the result as a planning estimate only, then copy it if the assumptions look right.
What people use it for
Estimate what today costs might become after inflation.
Estimate the future buying power of a fixed dollar amount.
Stress-test long-term savings or retirement assumptions.
Compare annual inflation-rate scenarios.
Quick examples
Future cost
$100 at 3% inflation for 10 yearsAbout $134.39 future cost, $34.39 increase, and 1.343916x multiplier
Buying power
$1,000 at 4% inflation for 5 yearsAbout $1,216.65 future cost and $821.93 present buying power
Planning scenario
$2,500 monthly expenses at 2.5% inflation for 15 yearsAbout $3,620.75 future monthly cost
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the Inflation CalculatorSee slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- FinanceBrowse related calculators and utilities in the same category.
- Calculator and utility guidesFind more guides that use real tool inputs and example numbers.
- All free toolsSearch every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Plain-language answers about when to use the estimate, what your numbers mean, what is left out, and how privacy works.
When should I use the Inflation Calculator?
Use it when you want to test the exact inputs on this page: Estimate what today costs might become after inflation. Estimate the future buying power of a fixed dollar amount. The result is a check against your assumptions, not proof that a lender, tax app, broker, platform, or provider will use the same number.
What do the main Inflation Calculator inputs mean?
Amount means the cost, budget, savings amount, or fixed dollar figure you want to adjust for the chosen inflation rate. Inflation rate means the annual rate you want to test, entered as 3 for 3%, not 0.03. Years means how many years the same annual inflation rate is applied before the future-cost and buying-power results are shown.
What does future cost mean?
Future cost estimates what the amount may cost after applying the same annual inflation rate for the years entered. For example, $100 at 3% for 10 years becomes about $134.39.
What does present buying power mean?
Present buying power works the other direction. It asks what a fixed future amount is worth in today-style dollars after inflation. In the default example, $100 has about $74.41 of present buying power after 10 years at 3%.
Does this use historical CPI data?
No. This calculator uses the inflation rate you enter. It does not fetch historical CPI, city CPI, category CPI, or official forecasts. Use BLS inflation data when you need official price-index history.
Can I enter negative inflation?
Yes, as long as the rate is greater than -100%. A negative rate models deflation for the chosen scenario. Real deflation can be uneven, so treat it as a what-if test.
What is the Inflation Calculator doing with my numbers?
In plain language: The calculator raises one plus the annual inflation rate to the number of years, then multiplies or divides the amount by that multiplier. $100 at 3% inflation for 10 years uses 1.03^10, or about 1.343916. The future cost is about $134.39, the increase is about $34.39, and the present buying power is about $74.41.
How should I read the Inflation Calculator answer?
Estimated future cost shows what the entered amount could cost after the chosen rate and years. Present buying power shows what that same fixed amount is worth in today-style dollars. Increase is the added cost, and multiplier shows the inflation factor.
What does this estimate leave out?
This is a rate-based inflation estimate. It does not look up CPI history, and the actual price of one item may rise faster or slower than broad inflation. Use BLS CPI tables, current local prices, contract terms, tax rules, wage assumptions, investment returns, and a real budget before treating an inflation estimate as a decision number.
What should I double-check before copying the result?
Check whether the amount is one-time, monthly, or yearly. Then check the inflation rate, the number of years, and whether you are modeling broad inflation or a specific item that may rise faster or slower.
Why can one item rise faster than the inflation result?
Broad inflation averages many prices. Rent, groceries, tuition, insurance, medical costs, and used cars can move differently from the overall rate, so one category can rise faster or slower.
How should I choose an inflation rate?
Use an official CPI history source, a budget assumption, or a conservative scenario range. Testing 2%, 3%, and 5% can be more useful than pretending one rate is certain.
Does this include taxes, fees, income growth, or investment returns?
No. It only adjusts the entered amount for the inflation rate and years. Taxes, fees, wages, investment returns, benefit increases, and changing spending habits can all change the real plan.
Does the site save my finance inputs?
No. The calculator runs in your browser tab. Recent answers stay only on the page while you use it, and they are not sent to a server.