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📆 Inflation Calculator

See how inflation erodes purchasing power over time. Compare the real value of money across years.

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The current value of money
Expected average annual inflation
Future time period

How Inflation Erodes Purchasing Power Over Time

Inflation is the rate at which prices rise over time, which is the same as saying it's the rate at which the purchasing power of money falls. This calculator applies the compound growth formula in reverse: Future Cost = Present Value × (1 + Inflation Rate)^Years. At a 5% annual inflation rate, something that costs $1,000 today will cost $1,629 in 10 years — and $2,653 in 20 years.

has historically experienced relatively high inflation compared to developed economies. The Reserve Bank (central banks) targets a CPI (Consumer Price Index) inflation range of 3–6%. When inflation runs above that — the real value of cash savings and fixed-income instruments erodes faster than usual. A savings account earning 6% in a 7% inflation environment is effectively losing purchasing power, even though the balance is growing.

Planning for retirement requires factoring in inflation carefully. If you'll retire in 25 years and currently spend $25,000 per month, you need to estimate what that lifestyle will cost in 25 years. At 5% inflation, the answer is approximately $84,600 per month — more than three times as much. This is why retirement calculators and financial advisors use real (inflation-adjusted) returns rather than nominal returns when projecting outcomes.

Salary negotiations are also an inflation exercise. If your salary hasn't kept pace with inflation, your real income has declined even if the number on your payslip has increased. A 3% raise in an environment of 7% inflation is a 4% real pay cut. Use this calculator to see whether your salary increases over the past few years have outpaced inflation — or fallen behind.

Use this calculator to understand the real impact of inflation on savings goals, future expenses, and the long-term cost of delaying financial decisions.

How to Calculate Inflation and Its Impact

Inflation measures the rate at which prices rise over time, reducing purchasing power. An inflation rate of 3% per year means that something costing $100 today will cost $103 next year, and $134.39 in 10 years. Your money buys less even if the number of dollars stays the same.

This calculator helps you understand how much a past amount is worth in today's money (adjusting for inflation), how much today's money will be worth in the future, and what investment return you need to beat inflation and grow real wealth.

Frequently Asked Questions

What is a normal inflation rate? +
Most central banks target 2% annual inflation as healthy for economic growth. Above 3-4% is considered elevated; above 7-8% is high inflation. Hyperinflation (above 50% monthly) is rare but devastating. Below 0% is deflation, which discourages spending and investment.
How does inflation affect savings? +
If your savings earn 2% interest but inflation is 4%, your real return is -2% — your purchasing power is shrinking even as your balance grows. To maintain real value, savings and investments must earn a return above the inflation rate.
How do I calculate the real return on an investment? +
Real return = ((1 + nominal return) ÷ (1 + inflation rate)) − 1. Approximate shortcut: real return ≈ nominal return − inflation rate. An investment returning 8% in a 3% inflation environment has a real return of approximately 5%. This is the actual increase in purchasing power.