What Is an Inflation Calculator? CPI Inflation Calculator Explained
An inflation calculator — also called a CPI inflation calculator, US inflation calculator, historical inflation calculator or purchasing power calculator — converts money values between years using the Consumer Price Index (CPI). The CPI tracks the average price of a basket of goods and services over time. According to the Federal Reserve and Investopedia: What Is Inflation, when CPI rises, purchasing power falls. Example from this dollar value calculator: $100 in 2000 = $193.91 in 2026 via this inflation calculator — 93.9% higher.
This CPI inflation calculator and inflation rate calculator doubles as a cost of living calculator and future value inflation calculator. It shows how this purchasing power calculator erodes wages and savings — why salary and investments must beat inflation to keep real value. Compare your raise with our Salary Increase Calculator (also an inflation-aware purchasing power calculator) or plan goals with the Savings Goal Calculator.
BLS Official Inflation Calculator Formula — Dollar Value Calculator Method
Adjusted Value = Amount × (CPI in To Year ÷ CPI in From Year)
CPI = CPI-U Annual Average (BLS base 1982–1984=100) — verified via FRED CPIAUCSL & BLS FAQ
This inflation rate calculator logic is identical to the BLS inflation calculator. See Investopedia: Purchasing Power for context.
How to Use This US Inflation Calculator — CPI & Purchasing Power Calculator Guide
- Enter amount in this inflation calculator — $1 to $1,000,000,000. This dollar value calculator accepts any USD value.
- Select years in this historical inflation calculator — From Year (original) and To Year (target), 1913–2026. This CPI inflation calculator uses CPI-U per year.
- Click Calculate on this inflation rate calculator — see this inflation calculator results: adjusted dollar value, total inflation %, average annual rate, and purchasing power calculator change.
- Model future with this future value inflation calculator — enter amount, expected inflation (e.g., 3%), years — this cost of living calculator shows real vs nominal dollars.
Tip from this inflation calculator: reverse it — $100 today was $51.58 in 2000 ($100 × 172.2 ÷ 333.9). This purchasing power calculator works both ways.
How This Purchasing Power Calculator Shows What Your Dollar Is Worth — Dollar Value Calculator Examples
This purchasing power calculator inside the inflation calculator reveals how cost of living erodes cash. The same historical inflation calculator basket costs more each year — your dollar buys less:
Inflation Calculator & Dollar Value Calculator: Same Amount Across Eras (2026 dollars)
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$1 in 1970 → $8.60 in 2026 — this inflation calculator shows 760% total.
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$100 in 2000 → $193.91 in 2026 (93.9%, ~2.55% avg) — this CPI inflation calculator proves prices nearly doubled.
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$100 in 1990 → $255.48 — this US inflation calculator and cost of living calculator for 36 yrs.
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$100 in 1980 → $405.22 — this historical inflation calculator over 46 yrs.
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$100 in 2019 → $130.59 — this inflation rate calculator shows 30.6% in 7 yrs post-COVID.
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$1,000 in 2010 → $1,530.94 — this dollar value calculator for college/housing.
Worked by this inflation calculator: $100 × (333.9 ÷ 172.2) = $193.91. Cumulative via this inflation rate calculator = (333.9−172.2)÷172.2×100 = 93.9%. Annualized = (333.9÷172.2)^(1÷26)−1 = 2.55%. Sources: BLS, FRED.
U.S. Inflation & Cost of Living by Decade — Historical Inflation Calculator Data
This historical inflation calculator table shows how this cost of living calculator metric varied. The 1970s oil shocks vs 2010s low era vs 2020–26 spike (peak 8.0% in 2022 per FRED CPI) drive this inflation calculator:
| Decade | Avg. Annual Rate | Key Event (FRED/BLS) |
|---|---|---|
| 1970s | 7.1% | Oil crisis, stagflation |
| 1980s | 5.1% | Volcker rate hikes |
| 1990s | 2.8% | Dot-com boom, stable growth |
| 2000s | 2.5% | Housing bubble, Great Recession |
| 2010s | 1.8% | Low inflation era |
| 2020–2026 | 4.2% | COVID stimulus, supply chains, 2022 peak 8.0% |
Historical inflation calculator source: BLS CPI & FRED CPIAUCSL. Also see Federal Reserve recent trends.
CPI Data & Methodology: Trusted BLS CPI Data Behind This Inflation Rate Calculator
What CPI data powers this inflation calculator?
This inflation calculator, CPI inflation calculator and purchasing power calculator uses CPI-U annual averages 1913–2025 (base 1982–1984=100) from the U.S. Bureau of Labor Statistics and FRED CPIAUCSL (St. Louis Fed). For 2026 this historical inflation calculator uses latest monthly CPI July 2026: 333.9 (BLS). This matches the BLS inflation calculator method. July 2026 YoY via this inflation rate calculator: 3.4% headline, 3.3% core — see BLS News Release.
Recent CPI-U Values — Verify This Inflation Calculator Yourself (BLS & FRED)
| Year | CPI-U | Note | What $100 is in 2026 (dollar value calculator) |
|---|---|---|---|
| 2026 | 333.9 | July 2026* | $100.00 |
| 2025 | 321.5 | annual avg | $103.86 |
| 2024 | 314.2 | $106.27 | |
| 2023 | 304.7 | $109.58 | |
| 2022 | 292.7 | 8.0% peak | $114.08 |
| 2021 | 271 | $123.21 | |
| 2020 | 258.8 | $129.02 | |
| 2019 | 255.7 | $130.58 | |
| 2018 | 251.1 | $132.97 | |
| 2015 | 237 | $140.89 | |
| 2010 | 218.1 | $153.09 | |
| 2000 | 172.2 | $193.90 | |
| 1990 | 130.7 | $255.47 | |
| 1980 | 82.4 | $405.22 | |
| 1970 | 38.8 | $860.57 |
Full 1913–2026 series embedded in this historical inflation calculator. Download: BLS CUUR0000SA0 · FRED CPIAUCSL · BLS FAQ. CPI basket: food, housing, transport, medical care — your cost of living calculator may differ. Learn inflation basics: Investopedia & Federal Reserve FAQ.
▶ How this inflation calculator handles 2026 & October 2025 gap
2026: This inflation calculator uses July 2026 monthly CPI (Aug 12, 2026 release). Replaced Jan 2027 by annual avg.
Oct 2025: BLS missed Oct 2025 CPI (appropriations lapse). Annual-average method in this CPI inflation calculator unaffected; monthly interpolates Sep-Nov geometric mean per BLS.
CPI-U vs C-CPI-U: This US inflation calculator uses CPI-U (~93% pop). Chained CPI ~0.25pp lower.
Why Use This Inflation Calculator? Salary, Savings & Future Value Inflation Calculator
Salary negotiations with this purchasing power calculator – 3% raise + 3.4% inflation = −0.4% real wage via this inflation calculator. Model with Salary Increase Calculator.
Retirement via future value inflation calculator – $100k today needs $181k in 20 yrs at 3% via this dollar value calculator. Plan with Savings Goal Calculator.
Investments vs cost of living calculator – Savings 2% vs 3% inflation loses vs this cost of living calculator. Compare with ROI Calculator.
Historical context from this historical inflation calculator – $1 in 1970 = $8.60 today via this inflation calculator (CPI 38.8→333.9, FRED).
Trust & Transparency — Why Google Trusts This Inflation Calculator
Disclaimer: This inflation calculator & purchasing power calculator is educational, not financial advice. Verify at bls.gov/cpi & FRED.