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Inflation Calculator

See how inflation increases living costs and erodes the future purchasing power of your money.

₹

The cost of goods or amount of cash today

%

Annual percentage increase in prices

Number of years in the future

Results

Future Cost of Same Goods
₹1,79,085
Today's Amount₹1,00,000
Future Purchasing Power₹55,839
Purchasing Power Lost₹44,161
Cumulative Price Rise+79.1%

Calculations assume a constant annual compound inflation rate.

How Inflation Impacts Your Wealth & Purchasing Power

Inflation is the annualized rate at which the general price level of goods and services rises, eroding the quantity of goods that each unit of currency can purchase. Financial planners analyze inflation from two reciprocal perspectives:

Perspective 1: Future Cost Escalation
FV = PV × (1 + i)t

Calculates how much money you will need in year t to purchase the exact basket of goods that costs PV today.

Perspective 2: Real Purchasing Power Decay
Real Value = PV ÷ (1 + i)t

Calculates the real economic purchasing capacity of a fixed sum of uninvested cash stored in a bank locker or low-yield account.

Worked Example: 10-Year Purchasing Power Erosion at 6% Inflation

Examining a baseline sum of ₹1,00,000 subjected to a steady 6.0% annual inflation rate over a 10-year horizon:

Economic MetricFormula / DerivationValueReal-World Meaning
Present Starting CapitalPV (Year 0)₹1,00,000Cost of goods or uninvested cash today.
Annual Inflation Rate (i)Assumed Benchmark6.0% p.a.Representative long-run CPI inflation rate.
Measurement Horizon (t)Time Period10 YearsOne decade of compounded price increases.
1. Future Equivalent Cost₹1,00,000 × (1.06)10₹1,79,085You will need ₹1.79L in 10 years to afford today's ₹1.0L basket (+79.1%).
2. Residual Purchasing Power₹1,00,000 ÷ (1.06)10₹55,839₹1.0L in uninvested cash will only buy ₹55,839 worth of today's goods.
3. Total Real Value Lost₹1,00,000 − ₹55,839₹44,161 (−44.2%)Inflation silently confiscated nearly 45% of your money's real purchasing capacity.

The "Rule of 72" Price Doubling Benchmark

A quick mental rule to estimate how many years it takes for general price levels to double:

Doubling Horizon (Years) = 72 ÷ Annual Inflation Rate
  • At 4.0% inflation: Prices double every 18.0 years.
  • At 6.0% inflation: Prices double every 12.0 years.
  • At 8.0% inflation: Prices double every 9.0 years.
  • At 10.0% inflation (Higher Education/Healthcare): Costs double every 7.2 years!

Asset Classes: Real Returns vs. Nominal Returns

Real wealth creation requires earning a return above the rate of inflation (Real Return = Nominal Yield − Inflation − Taxes):

  • Bank Fixed Deposits (6.5% gross): After 30% tax slab (4.55% net) and 6% inflation, real return is −1.45% (wealth is shrinking).
  • Diversified Equities (12% CAGR): Provides a strong positive real buffer of +5% to +6% above inflation.
  • Real Estate & Gold: Historically provide reliable structural hedges matching or slightly exceeding baseline CPI inflation.

Assumptions & Analytical Limitations

  • Headline CPI vs. Personal Inflation Rate: Official headline Consumer Price Index (CPI) reflects a generalized national basket. Families with children in private schools or members with recurring medical needs experience personal inflation rates 3% to 5% higher than official statistics.
  • Constant Compounding Rate: In reality, inflation is volatile and cyclical, fluctuating in response to monetary policy, commodity shocks, and exchange rate movements.
  • Exclusion of Tax Drag: Inflation calculators show gross erosion. When savings interest is taxed at ordinary income slabs, the destructive impact on purchasing power is amplified.
Is Your Bank Deposit Actually Beating Inflation?When nominal returns are taxed at marginal slab rates, even a 7% Fixed Deposit (FD) can deliver a negative real yield. Read our comprehensive analysis: The Real Rate of Return: Why Your 7% Fixed Deposit (FD) Might Be Losing Money to learn the exact Fisher Equation and joint tax-inflation modeling.

Frequently asked questions

What does an inflation calculator measure?
An inflation calculator measures two fundamental economic impacts: (1) what a basket of goods costing a certain amount today will cost in the future, and (2) how much the purchasing power of a fixed amount of cash diminishes over time.
What is purchasing power risk?
Purchasing power risk, also known as inflation risk, is the danger that cash holdings or fixed-income investment returns will fail to keep pace with the rate of inflation, resulting in a net decline in the real value of your wealth over time.
What average inflation rate should I assume?
Historical inflation benchmarks vary by economy. For developing economies like India, long-term CPI inflation typically oscillates around 5.5% to 6.5%. For mature economies like the United States, central banks target approximately 2.0% to 3.0% long-term inflation.
How do I protect my savings against inflation?
To preserve purchasing power, investments need to generate a real return (nominal return minus inflation). Common inflation hedges include equity equities, equity mutual funds, real estate, inflation-indexed bonds, and commodities like gold.
What is the Rule of 72 regarding inflation?
The Rule of 72 estimates how long it takes prices to double at a constant inflation rate: divide 72 by the annual inflation rate. For example, at 6% annual inflation, general price levels double in approximately 72 ÷ 6 = 12 years.

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Future Cost of Today's Amount

₹1,79,085