Inflation Calculator

Future Cost (Same Purchasing Power)
$1,344
–

📉 Purchasing Power

Today's $1,000 in the Future–
Future $1,000, Value Today–
Total Cumulative Inflation–

What Is an Inflation Calculator?

An inflation calculator shows how rising prices erode purchasing power over time — either projecting what a current amount will cost in the future, or discounting a future amount to show what it's really worth in today's dollars.

How to Use the Inflation Calculator

  1. Enter an amount of money.
  2. Enter the number of years.
  3. Enter an average annual inflation rate (roughly 2-3% has been typical in the US over long periods, though it varies).
  4. View both future cost and today's-value projections.

Inflation Formula

Future Cost (same purchasing power)
Future Cost = Amount × (1 + inflation rate)^years
Real (Today's) Value of a Future Amount
Real Value = Amount ÷ (1 + inflation rate)^years

Worked Example

Example: $1,000 Today, 3% Inflation, 10 Years

Future cost: $1,000 × (1.03)^10 ≈ $1,344

This means something costing $1,000 today would cost roughly $1,344 in 10 years at 3% average annual inflation.

Understanding Your Results

Future Cost shows what today's amount would cost in the future at the given inflation rate — useful for understanding how much prices might rise. Real Value works in reverse, showing what a future dollar amount is really worth in today's purchasing power — critical for retirement and long-term financial planning.

Why Inflation Matters for Financial Planning

  • Savings that don't grow faster than inflation lose real purchasing power over time.
  • Retirement planning should account for inflation eroding fixed income over decades.
  • Salary negotiations and long-term contracts should consider inflation's cumulative effect.

Common Mistakes to Avoid

  • Assuming a single "correct" inflation rate — actual rates vary significantly year to year and by what's being purchased.
  • Confusing nominal returns (not adjusted for inflation) with real returns (adjusted for inflation) when evaluating investments.
  • Ignoring inflation entirely in long-term financial projections.

Frequently Asked Questions

US inflation has historically averaged roughly 2-3% annually over long periods, though it has varied significantly year to year, including periods well above and below that range.

Money sitting in an account earning less than the inflation rate loses real purchasing power over time, even though the dollar amount stays the same or grows slightly.

Nominal return is the raw percentage gain before adjusting for inflation. Real return subtracts inflation's effect, showing the actual increase in purchasing power.

Since retirement can span decades, even moderate inflation significantly erodes fixed income's purchasing power over time — retirement plans should account for this by targeting a larger nominal nest egg or income that grows with inflation.

Not necessarily — if a fixed rate is lower than the inflation rate, the real value of the underlying money still declines over time despite the account balance growing nominally.