Inflation Calculator
FREEProject future purchasing power, explore historical CPI data, or plan your inflation-adjusted budget.
$55,839
What your $100,000 will be worth in 10 years at 6% p.a.
Future Cost
$179,085
Cumulative Value Loss
Inflation erodes real wealth
Principal
$100,000
Horizon
10 Yrs
Rate
6%
An item costing $100,000 today will require $179,085 in 10 years. Cash savings that don't earn above the inflation rate are guaranteed losers in real terms.
Contextual Insights
Moderate Price Acceleration
At 6.0% p.a., cost rises are noticeable. Money halves in real value every 12 years. Diversify into equities, real estate, or inflation-indexed bonds to sustain real wealth.
Inflation Hedging Playbook
- →Equities: Quality businesses pass price rises to consumers.
- →Real Estate: Values & rents historically appreciate with CPI.
- →TIPS / I-Bonds: Principal adjusts automatically with inflation index.
The Idle Cash Warning
Cash sitting in a standard savings account suffers a guaranteed real wealth erosion of ~6.0% annually. Keep only 3–6 months of emergency expenses as liquid cash, and channel surplus capital into productive assets that outpace the inflation rate to preserve long-term purchasing power.
The Invisible Tax Nobody Voted For
Inflation is not a sudden market crash or a bank failure. It is the slow, compounding erosion of everything you have ever saved. Nobody sends you a bill in the mail—it just quietly shows up at the grocery store, the gas pump, and your rent renewal.
Think about your grocery cart. The basket of essentials that cost you $150 in 2019 now costs roughly $195. It's the exact same food. The same quantity. The same quality. You didn't get richer; your dollars simply got weaker.
The Money Illusion
Your bank account tells a lie. It shows the same $100,000 balance year after year, making you feel financially secure. But what that $100,000 can actually buy shrinks every single month. Use the Future Projections mode in the calculator above to strip away the illusion and see exactly how much of your savings will evaporate over your time horizon.
What the CPI Actually Measures (And What It Misses)
When the news reports that "inflation is 3%," they are quoting the Consumer Price Index (CPI). The CPI tracks a basket of about 80,000 goods and services. It is the best macroeconomic tool we have, but it is an average. And your household budget is not "average."
Owner's Equivalent Rent
The CPI doesn't look at actual home prices or mortgage rates. Instead, the Bureau of Labor Statistics estimates what homeowners would pay if they were renting their own houses. This methodology drastically lags real-world housing spikes, masking the pain faced by first-time homebuyers.
Substitution Bias
If the price of beef skyrockets, the CPI assumes you'll just start buying cheaper chicken instead. While mathematically correct for balancing a spreadsheet, practically it means the government is measuring a declining standard of living and calling it "stable prices."
Hedonic Adjustments
New cars cost thousands more today, but they come with backup cameras and advanced safety sensors. The BLS adjusts the price downward to account for the "added quality." You still have to write a massive check, but the CPI says the "real" price increase was much smaller.
The Rule of 72: How Fast Your Money Halves
You don't need a spreadsheet to figure out when inflation will destroy your buying power. Just use the Rule of 72.
Divide the number 72 by your expected annual inflation rate. The result is exactly how many years it will take for your money's purchasing power to be cut in half.
- At 3% inflation: 72 ÷ 3 = 24 years to halve your wealth.
- At 6% inflation: 72 ÷ 6 = 12 years to halve your wealth.
- At 8% inflation: 72 ÷ 8 = 9 years to halve your wealth.
This isn't hypothetical math. This is the brutal reality behind every underfunded college savings account and every "I thought I had enough" retirement plan. The Insights panel in our calculator uses this exact logic to warn you when your currency is in severe erosion.
Why Prices Don't Go Back Down (The Sticky Price Trap)
One of the most frustrating headlines to read is "Inflation drops to 2%!" when you are standing in a grocery aisle staring at a $7 box of cereal. Why is everything still so expensive?
Because inflation is a rate of speed, not a price tag. When inflation drops from 8% to 2%, it doesn't mean prices are falling. It means prices are still climbing, just at a slower pace. The $7 cereal isn't going back to $4.
Sticky Wages
Once businesses give employees cost-of-living raises, those salaries rarely go back down. To maintain profit margins with permanently higher labor costs, businesses must keep retail prices permanently elevated.
Shrinkflation
Often, prices stay the same but the package shrinks. You are paying more per ounce or per sheet, but without the "sticker shock." It's a hidden price hike that permanently resets the baseline cost of living.
Use the Budget Planner mode in the calculator to map this out. The numbers don't go backward. Your only defense is to ensure your income and investments grow faster than the new baseline.
Is Your Annual Raise Actually a Pay Cut?
If your boss handed you a 3% raise this year, you probably celebrated. But if inflation ran at 4% over the same period, congratulations—you just took a 1% real pay cut.
Your paycheck is nominally larger, but it buys fewer goods than it did twelve months ago. Between 2021 and 2023, millions of salaried workers experienced massive cumulative real wage losses despite receiving annual raises. The raises simply couldn't keep pace with 6–9% inflation.
If your employer hands you a 3% raise and calls it "competitive" during a 4% inflationary period, they are paying you less than they did last year in real terms. Full stop.
The Inflation Hedging Playbook: What Actually Works
Cash sitting in a checking account is a guaranteed loser. If you want to protect your purchasing power, you have to park your capital in assets that outpace the inflation rate. Here is the hierarchy of inflation hedges, ranked by reliability.
The Guaranteed Floor: I-Bonds & TIPS
If you cannot tolerate risk, U.S. government-backed I-Bonds and TIPS (Treasury Inflation-Protected Securities) are your best friends. The principal on these bonds adjusts upward based directly on the CPI. I-Bonds have a $10,000 annual purchase limit and a 12-month lock-up. TIPS can be bought in unlimited quantities, but should be held to maturity to avoid secondary market volatility.
The Growth Engine: Equities (Stocks)
Over 30-year horizons, the stock market is the ultimate inflation killer, historically beating inflation by 4–7% annually. Why? Because great companies have pricing power. When their costs go up, they raise retail prices, which grows their revenue, which eventually boosts their stock price.
The Physical Hedge: Real Estate
Real estate offers a unique double-hedge. First, property values and rental income historically rise alongside general inflation. Second, if you buy with a 30-year fixed-rate mortgage, you are locking in your biggest monthly expense while paying back the bank with increasingly "cheaper" inflated dollars.
The Danger of Using 3% for Retirement Planning
Most basic retirement calculators default to a flat 3% inflation rate for your entire 30-year retirement. This is dangerously simplistic because retirees do not buy a normal "basket of goods." Retirees buy healthcare.
Healthcare inflation typically runs at 5–7% annually—roughly double the general CPI rate. Fidelity estimates that a 65-year-old retiring today will need over $170,000 in after-tax savings just to cover Medicare premiums and out-of-pocket medical expenses (excluding long-term care).
If healthcare makes up 25% of your retirement budget, using a blended 3% inflation rate will result in a massive shortfall.
The Action Plan: Use the Budget Planner mode on this page. Enter your expected retirement expenses, but use a conservative 4% or 4.5% overall inflation rate to account for medical costs. Look at the "Extra Needed /mo" figure. That is the true gap between your current savings plan and reality.
Frequently Asked Questions
The most common questions about the Consumer Price Index, hyperinflation, and purchasing power, answered simply.