Toolkit Shelf

Money Calculators

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.

Reviewed May 25, 2026EstimateFormula shown

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.

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

  • Quick future cost from current amount, inflation rate and years.
  • Personal finance scenarios before changing a budget, loan, savings goal, or purchase plan.
  • Monthly cash flow, affordability, debt payoff, or future-value estimates.
  • Assumption checks before talking with a lender, tax preparer, employer, or financial professional.

Before relying on it

Check first

  • Entering current amount, inflation rate and years from different time periods or scenarios.
  • Mixing gross income, take-home income, one-time costs, and monthly costs in the same comparison.
  • Forgetting taxes, fees, insurance, irregular bills, or minimum payments when using an estimate.
  • Treating a planning estimate as a quote, tax filing result, approval decision, or guaranteed return.

Benchmarks

How to read the result

The calculator is a decision aid, not a fixed rule. Use the output to compare scenarios and document your assumptions.

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

The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.

Formula

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

Inputs used

Current amount, Inflation rate, Years

Limitations

Results are estimates for quick planning and should be checked before important financial, legal, tax, health, or business decisions.

Last reviewed

May 25, 2026

Cite this page

Toolkit Shelf. Inflation Calculator. Retrieved May 25, 2026, from 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.