Toolkit Shelf
Find

Inflation Calculator

Use this inflation calculator to estimate how prices may change over time and what today's money may be worth in future dollars.

Planning estimate

Live calculator

Inflation calculator

Future cost$134.39

$100.00 today after 34.4% cumulative inflation.

Price increase$34.39

Difference between the current amount and estimated future cost.

Purchasing power$74.41

What the same amount would buy in today's dollars after inflation.

Use this as a planning estimate. Taxes, fees, rates, account terms, provider policies, local rules, and timing can change real-world results.

Formula

Inflation formula

Future cost = current amount x (1 + inflation rate)^years

This is a rate-based estimate, not a historical CPI lookup.

How to use

Steps

  1. Enter the current amount.
  2. Enter an annual inflation assumption.
  3. Enter the number of years.
  4. Compare future cost, price increase, and purchasing power.

Example

Sample calculation

Current amount$100
Inflation rate3%
Years10
Future cost$134.39

Calculator use

Best for

  • Estimating savings, budget, debt, tax, interest, retirement, or net-worth scenarios before changing a money plan.
  • Comparing monthly contributions, withdrawals, balances, interest rates, payoff order, or tax assumptions with the math visible.

Before relying on it

Check first

  • Treating an estimate as tax filing advice, investment advice, guaranteed return, or an official account balance.
  • Leaving out fees, taxes, inflation, irregular bills, employer benefits, penalties, changing rates, or timing differences.
  • Comparing scenarios with different time horizons, compounding assumptions, or gross versus after-tax amounts.

Details

What to know before using the result

Scenario inputscurrent amount, inflation rate, and years

Keep current amount and inflation rate aligned to the same scenario so future cost represents a consistent calculation.

Method checkInflation formula

The tool applies Future cost = current amount x (1 + inflation rate)^years to the entered values, then keeps future cost, examples, assumptions, and limits visible for review.

Source notes

References used for this calculator

U.S. Bureau of Labor StatisticsExplains the Consumer Price Index and its use as a measure of price change and consumer inflation.

Benchmarks

How to read the result

2%: Low inflation.

Often used as a long-run planning assumption.

3% - 4%: Moderate.

Enough to noticeably change costs over longer periods.

5%+: High.

Compounds quickly and can materially reduce purchasing power.

Calculator accuracy

Methodology and assumptions

Formula, inputs, limitations and review record
Formula

Future cost = current amount x (1 + inflation rate)^years

Inputs used

Current amount, Inflation rate, Years

Limitations

Money results are planning estimates. Actual taxes, account terms, rates, fees, timing, local rules, and provider policies can change the real-world result.

Review record

Catalog QA baseline on June 6, 2026. This date marks the catalog-wide automated and editorial QA baseline, not a tool-specific expert review.

Cite this page

Toolkit Shelf. Inflation Calculator. https://toolkitshelf.com/tools/inflation-calculator

FAQ

Common questions

How do I calculate inflation over time?

Multiply the current amount by one plus the inflation rate, raised to the number of years.

Is this a historical inflation calculator?

No. This calculator uses the rate you enter to estimate future cost or purchasing power.

What does purchasing power mean?

Purchasing power estimates what the same amount of money would buy after inflation changes prices.

Is this based on historical CPI data?

No. It compounds the inflation rate you enter. Use official CPI tools if you need historical purchasing-power comparisons.

Why does inflation matter more over long periods?

Inflation compounds, so a modest annual rate can create a large price difference over many years.