Inflation Adjustment Calculator

How to use Inflation Adjustment Calculator

Equivalent future cost multiplies the starting amount by (1 + inflation rate)^years. Purchasing power of an unchanged amount divides by that same factor.

1. Enter amount in starting-year money, assumed annual inflation rate (%), years forward.
2. Check that the input follows the stated limits and uses consistent units.
3. Run the calculator, review the result, then copy or download it.

Good to know

• The rate is hypothetical and user supplied, not historical CPI. Rate must exceed −100%, duration is 0–100 years, and no country-specific basket is inferred.
• Decimal inputs have at most 120 characters and magnitude from 1e-100 to 1e15, or zero. Floating-point results are rounded to 12 significant digits; extreme derived results may underflow or be rejected. Exact integer results are identified separately.
• Educational estimate with user-entered assumptions, not a quote or financial/tax advice. Rates are hypothetical, fixed, and not fetched. Fees, taxes, inflation, payment-day conventions, and currency rules are excluded unless explicitly entered.