Inflation Calculator
Calculate how much today's prices will cost in the future due to inflation.
Calculate what today's money was worth in the past (adjusted for inflation).
What Is Inflation?
Inflation is the rate at which prices increase over time, reducing the purchasing power of money. When inflation is 3%, something that costs $100 today will cost approximately $103 next year.
Inflation affects everything from groceries and rent to salaries and savings. Understanding inflation helps you plan for retirement, negotiate salaries, and make informed investment decisions.
The Inflation Formula
Example: $1,000 at 3% annual inflation for 10 years:
$1,000 × (1.03)10 = $1,343.92
This means something that costs $1,000 today would cost $1,343.92 in 10 years if prices rise at 3% annually.
Quick Reference: $1,000 Over Time
How much will $1,000 be worth in the future at different inflation rates?
| Years | 2% Inflation | 3% Inflation | 4% Inflation | 5% Inflation |
|---|---|---|---|---|
| 5 years | $1,104 | $1,159 | $1,217 | $1,276 |
| 10 years | $1,219 | $1,344 | $1,480 | $1,629 |
| 20 years | $1,486 | $1,806 | $2,191 | $2,653 |
| 30 years | $1,811 | $2,427 | $3,243 | $4,322 |
These values show future costs. At 3% inflation, today's $1,000 purchase will cost $2,427 in 30 years.
Purchasing Power Loss
The flip side of inflation is purchasing power erosion. Money saved today buys less in the future. This is why keeping large amounts in non-interest-bearing accounts effectively loses value over time.
What $100 Buys Over Time (at 3% Inflation)
| Time Period | Equivalent Purchasing Power | Value Lost |
|---|---|---|
| Today | $100.00 | $0 |
| In 5 years | $86.26 | $13.74 |
| In 10 years | $74.41 | $25.59 |
| In 20 years | $55.37 | $44.63 |
| In 30 years | $41.20 | $58.80 |
Key insight: At 3% inflation, money loses roughly half its purchasing power every 24 years. This is why long-term savings need to grow faster than inflation to maintain real value.
What Inflation Rate Should I Use?
The right inflation assumption depends on your planning horizon and risk tolerance:
- 2%: Central bank target rate (Federal Reserve, ECB). Optimistic for long-term planning.
- 2.5–3%: Historical US average. Good middle-ground for most calculations.
- 3.5–4%: Conservative estimate. Accounts for periods of higher inflation.
- 5%+: High-inflation scenario. Useful for stress-testing financial plans.
Historical note: US inflation has averaged approximately 3.2% since 1926, with significant variation by decade. The 1970s saw rates above 10%, while the 2010s averaged below 2%.
Common Uses for This Calculator
- Retirement planning: Estimate future living expenses to determine savings goals
- Salary negotiation: Calculate whether a raise keeps pace with inflation
- Investment returns: Assess real (inflation-adjusted) returns on investments
- Education costs: Project future college tuition based on historical trends
- Home buying: Estimate future housing costs and mortgage affordability
- Business planning: Forecast future costs for budgeting and pricing decisions
Frequently Asked Questions
What causes inflation?
Inflation typically results from: (1) increased money supply, (2) rising production costs (cost-push), (3) strong consumer demand (demand-pull), or (4) expectations of future price increases. Central banks use interest rates to influence inflation.
Is inflation always bad?
Moderate inflation (2-3%) is generally considered healthy for an economy. It encourages spending and investment rather than hoarding cash. Deflation (falling prices) can actually be more damaging, as it discourages spending and can lead to economic stagnation.
How do I protect against inflation?
Common inflation hedges include: stocks (companies can raise prices), real estate, Treasury Inflation-Protected Securities (TIPS), commodities, and I-Bonds. The key is ensuring your savings grow faster than inflation.
What's the Rule of 72 for inflation?
Divide 72 by the inflation rate to estimate how many years until prices double. At 3% inflation: 72 ÷ 3 = 24 years. At 6% inflation: 72 ÷ 6 = 12 years. This quick mental math helps gauge long-term impact.
Why does inflation feel higher than reported?
Official inflation measures (like CPI) are averages across many goods and services. Your personal inflation rate depends on what you buy. Housing, healthcare, and education often rise faster than the overall average, making inflation feel higher for many households.
What is real vs. nominal return?
Nominal return is your stated investment gain. Real return subtracts inflation. If your investment earns 7% but inflation is 3%, your real return is approximately 4%. Real return reflects actual purchasing power growth.
Related Tools
- Compound Interest Calculator – See how investments grow over time
- Savings Goal Calculator – Plan how much to save for future goals
- Percentage Calculator – Calculate percentages and percentage changes
- Salary to Hourly Calculator – Convert annual salary to hourly rate
Privacy & Limitations
- All calculations run entirely in your browser -- nothing is sent to any server.
- Results are estimates for planning purposes and should not replace professional financial advice.
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Inflation Calculator FAQ
What is inflation?
Inflation is the rate at which prices increase over time, reducing the purchasing power of money. If inflation is 3%, something that costs $100 today will cost $103 next year.
How do I calculate the future value with inflation?
Use this formula: Future Value = Present Value × (1 + Inflation Rate)^Years. For example, $1,000 at 3% inflation for 10 years equals $1,000 × 1.03^10 = $1,343.92.
What is a good inflation rate assumption to use?
Historical US inflation has averaged around 3% annually over the past century. For conservative planning, many financial advisors suggest using 2.5-3.5%. Central banks often target 2% inflation.
What is purchasing power?
Purchasing power is the amount of goods or services your money can buy. Inflation erodes purchasing power over time, meaning the same amount of money buys less in the future.
How much does $100 lose to 3% inflation per year?
At 3% inflation, $100 loses about $3 of purchasing power in the first year. After 10 years, that $100 has the equivalent buying power of about $74 in today's dollars. After 25 years, it's worth only about $48.