Inflation Calculator
Calculate what your money will be worth in the future after inflation, or find what a past dollar amount equals today. Enter amount, inflation rate, and years.
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Enter your values above to see the results.
Tips & Notes
- ✓The US Federal Reserve targets 2% annual inflation as its long-run goal. Use 2-3% for long-term planning; use the current CPI rate (check BLS.gov) for near-term projections.
- ✓The Rule of 70 estimates how long it takes purchasing power to halve: 70 ÷ inflation rate = years. At 3% inflation, purchasing power halves in about 23 years.
- ✓Wages, retirement income, and investments must outpace inflation to maintain real purchasing power. A savings account at 1% while inflation runs 3% loses 2% of real value per year.
- ✓Inflation affects categories differently — medical costs typically inflate at 5-7%/year; technology deflates; housing and education have historically inflated faster than overall CPI.
- ✓For salary negotiations, use inflation data: if salaries have not kept pace with inflation over several years, a raise that matches inflation is actually maintaining (not improving) real compensation.
Common Mistakes
- ✗Confusing nominal value with real value — $50,000 in 2004 is not the same as $50,000 in 2024. The 2004 amount had significantly more purchasing power (equivalent to about $80,000 today at historical CPI).
- ✗Using a single inflation rate for different expense categories — healthcare costs have inflated at 5-7%/year while electronics deflate. Use category-specific rates for important financial projections.
- ✗Forgetting to account for inflation when evaluating fixed pension or annuity income — $2,000/month today will buy roughly $1,340/month worth of goods in 20 years at 2% inflation.
- ✗Not discounting future cash flows for time value — $100,000 received in 20 years is worth far less in today's dollars than $100,000 today. Use the present value formula to compare.
- ✗Applying compound inflation incorrectly — inflation compounds, not adds. Ten years of 5% inflation is not 50% loss of purchasing power; it is (1.05)^10 = 1.629, or 62.9% inflation (price increase).
Inflation Calculator Overview
Inflation is the steady erosion of purchasing power over time — the reason $100 from 1990 bought far more than $100 does today, and why retirement planning, salary negotiations, and investment returns must all be evaluated in real (inflation-adjusted) terms, not nominal dollar amounts.
Inflation formulas:
Future Value = Present Value × (1 + Rate)^Years | Present Value = Future Value / (1 + Rate)^Years
EX: $50,000 salary today at 3% annual inflation → in 10 years: $50,000 × (1.03)^10 = $50,000 × 1.3439 = $67,196 needed to maintain same purchasing power. Alternatively: today's $50,000 in 10 years of 3% inflation has real value of $50,000 / 1.3439 = $37,205 in today's dollars.Historical US inflation rates and purchasing power:
| Year | Annual CPI Rate | Cumulative (from 2000) | $100 in 2000 = (in that year) |
|---|---|---|---|
| 2000 | 3.4% | — | $100.00 |
| 2005 | 3.4% | +13.5% | $113.50 |
| 2010 | 1.6% | +26.6% | $126.60 |
| 2015 | 0.1% | +37.2% | $137.20 |
| 2020 | 1.2% | +54.6% | $154.60 |
| 2022 | 8.0% | +76.4% | $176.40 |
| 2024 | ~3.0% | ~+89% | ~$189.00 |
| Category | Historical Annual Rate | $100 After 20 Years |
|---|---|---|
| Medical / healthcare | 5-7% | $265-387 |
| College tuition | 4-6% | $219-321 |
| Housing (rent/price) | 3-5% | $181-265 |
| Food at home | 2-3% | $149-181 |
| General CPI (all items) | 2-3% | $149-181 |
| Electronics / technology | −1 to −5% | $67-82 (deflation) |
Frequently Asked Questions
Inflation erodes purchasing power — the same amount of money buys fewer goods and services over time. At 3% annual inflation: $100 today becomes equivalent to $74.41 in purchasing power after 10 years (you would need $134.39 to maintain today's $100 purchasing power). At 7% inflation (near 2022 US peak): $100 today has only $50.83 of equivalent purchasing power in 10 years. This is why keeping money in low-yield savings accounts during high inflation periods represents a real loss of wealth, even as the nominal balance stays the same.
For US dollar long-term planning: use 2-3% for general consumer prices (Federal Reserve target is 2%); use 5-7% for healthcare and medical costs (historically higher than general inflation); use 3-5% for housing costs; use 4-6% for college tuition (historically outpaced general inflation significantly); use −1 to −3% for electronics and technology (generally deflates). For retirement planning spanning 20-30 years, financial advisors often use 2.5-3.5% as a conservative baseline for general expenses. Check BLS.gov (Consumer Price Index data) for current and historical US inflation rates.
The US dollar has lost about 96% of its purchasing power since 1913 when the Federal Reserve was established. What cost $1.00 in 1913 cost approximately $30 in 2024. In shorter windows: $1 in 2000 equals about $1.80 in 2024 purchasing power (80% cumulative inflation). $1 in 1990 equals about $2.43 in 2024. $1 in 1980 equals about $3.78 in 2024. The 1970s experienced particularly high inflation — 1970-1980 saw cumulative inflation of about 112%, nearly doubling prices in a single decade. The COVID-19 era (2020-2023) saw cumulative inflation of about 19%.
CPI (Consumer Price Index) measures price changes for a fixed basket of urban consumer goods. PCE (Personal Consumption Expenditures) index measures actual consumer spending patterns and allows the basket to change as people substitute cheaper alternatives. The Federal Reserve uses PCE as its primary inflation target (2% PCE). PCE typically reads 0.2-0.5 percentage points below CPI because it accounts for substitution behavior. Social Security cost-of-living adjustments (COLAs) use CPI-W (CPI for Urban Wage Earners). Most financial planning discussions refer to CPI because it is more familiar and widely reported.
Inflation benefits borrowers with fixed-rate debt — you repay with dollars that are worth less than when you borrowed. At 3% annual inflation, the real cost of a fixed $1,500/month mortgage payment decreases each year. In 10 years, that $1,500 has the purchasing power equivalent of only $1,115 in today's dollars — the payment has effectively gotten cheaper in real terms. This is why periods of high inflation (1970s) rapidly eroded the real burden of fixed mortgage debt, and why fixed-rate mortgages are attractive when inflation is expected to run above the loan's interest rate.
Inflation is rising prices (declining purchasing power); deflation is falling prices (rising purchasing power). While falling prices sound beneficial, deflation is typically harmful to economies — consumers delay purchases expecting prices to fall further, businesses see revenue decline, leading to layoffs and recession (Japan's "lost decade" of 1990s deflation is the classic example). Mild inflation (2-3%) is considered healthy because it encourages spending and investment, makes debts easier to repay, and gives central banks room to lower interest rates during downturns. Hyperinflation (above 50%/month) is devastating — Germany's Weimar Republic (1921-1923) saw prices double every 3.7 days at peak.