Inflation Calculator

Inflation Calculator — Adjust Values for Inflation and Compare Purchasing Power

This calculator uses the compound inflation formula to answer two questions: what will a current dollar amount cost in the future, and how much real purchasing power does that same amount lose over time? Enter any dollar value — a salary, a monthly budget, a savings target, or a retirement withdrawal — and see the real-dollar impact of inflation across any time horizon.

The U.S. Bureau of Labor Statistics measures inflation through the Consumer Price Index for All Urban Consumers (CPI-U) — a monthly survey of prices paid by approximately 93% of the U.S. population across some 80,000 items in categories including food, housing, energy, medical care, and transportation. The Federal Reserve targets 2% annual PCE inflation as consistent with long-run price stability. As of April 2026, the 12-month CPI-U stands at 3.8% (BLS, May 2026).

How the Inflation Calculator Works

The Compound Inflation Formula

Both formulas use compound growth, not simple interest. Inflation compounds annually — each year's price level builds on the previous year's higher prices. This is why 3% inflation over 30 years does not mean a 90% price increase. It means a 143% increase: (1.03)^30 = 2.427. The compounding effect is substantial over long time horizons and is the same mathematical mechanism as compound interest, applied in reverse against purchasing power.

Data Sources and CPI Series

The BLS publishes thousands of CPI indexes. For general inflation adjustment across goods and services, the standard reference is the All Items CPI-U (series CUSR0000SA0). Social Security COLA adjustments use the CPI-W (Urban Wage Earners and Clerical Workers). Treasury Inflation-Protected Securities (TIPS) are indexed to the All Items CPI-U. The core CPI (all items less food and energy) strips out volatile categories and as of April 2026 is running at 2.8% year-over-year.

Inputs Explained

• Current Amount: The dollar value to inflation-adjust — a price, salary, savings target, or monthly budget
• Annual Inflation Rate: Assumed average yearly rate. Use 2% for the Fed's long-run target; 3% as a conservative historical baseline; 3.8% to reflect April 2026 CPI-U
• Years: Your time horizon — years into the future to project costs, or years back to adjust a historical value

Visual 1: Future Cost of $1,000 at Different Annual Inflation Rates (10 Years)

Starting amount: $1,000. After 10 years, 1% inflation costs $1,105 — barely noticeable. At 5% inflation the same amount costs $1,629 — a 63% increase. The Fed's 2% target yields $1,219; current 2026 CPI-U of 3.8% falls between the 3% and 4% bars.

Historical Inflation Examples and Worked Calculations

The following three examples use compound inflation calculations consistent with BLS CPI-U methodology. Worked percentages reflect actual or estimated CPI-U annual averages.

Visual 2: Real Purchasing Power of $100,000 Over 30 Years (3% Annual Inflation)

At 3% annual inflation, $100,000 today retains only $41,200 in real purchasing power after 30 years — a 59% erosion. This is why inflation-adjusting savings targets and retirement withdrawals is critical, and why fixed pensions lose value dramatically over long retirements.

Use Cases — Salary Adjustment, Retirement, and Fixed Income

Salary Inflation Adjustment

Workers should compare their salary growth to CPI-U to determine if their real wages are rising or falling. A salary growing at 2% per year while CPI averages 3.5% represents a real wage cut of about 1.5% per year — cumulative over 10 years, that is a 14% loss in real purchasing power despite nominal raises. Use this calculator with the BLS average annual CPI rate for your time window to determine the inflation-equivalent of any historical salary in current dollars.

The Bureau of Labor Statistics Employment Cost Index (ECI) and Real Earnings data track inflation-adjusted wages across industries. The Federal Reserve monitors real wage growth as an indicator of household purchasing capacity.

Retirement Planning and Purchasing Power

The Federal Reserve notes that inflation uncertainty is one of the most significant risks for retirees on fixed income. Social Security partially addresses this through an annual Cost-of-Living Adjustment (COLA) tied to the CPI-W — in 2024 the COLA was 3.2%, in 2023 it was 8.7%. Private pensions and annuities typically do not include COLA adjustments, leaving retirees exposed to purchasing power erosion.

A rule of thumb from retirement planning research: assume 2.5-3% annual inflation for long-range (20-30 year) planning horizons. Use this calculator to determine what monthly income you will need in nominal future dollars to match today's purchasing power.

Fixed Pensions and Annuities

A fixed monthly pension of $2,000 loses real value every year inflation exceeds zero. At 3% inflation over 15 years, that $2,000 payment retains only $1,283 in real purchasing power — a 36% loss. Over 25 years the loss deepens to 48%. This structural vulnerability is why the Consumer Financial Protection Bureau emphasizes understanding inflation-adjusted income when evaluating retirement readiness, and why Social Security's COLA mechanism represents a meaningful financial advantage over non-indexed private pension income.

Visual 3: Annual US CPI-U Inflation Rate 2016–2026

CPI-U annual rates. 2021-2022 represent the highest US inflation since the early 1980s — driven by pandemic supply disruptions, fiscal stimulus, and energy price shocks. By 2023-2024 inflation returned toward pre-pandemic levels. 2025 is an estimate; 2026 reflects the April 2026 12-month CPI-U (3.8%, BLS May 2026). Source: U.S. Bureau of Labor Statistics.

Frequently Asked Questions