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Calculates

Inflation Calculator

Project the compounding effect of inflation on your future purchasing power.

Calculated & verified for mathematical accuracy·Reviewed by the Calculates Editorial Team

Inflation details

Calculation mode
0 – 1,00,00,00,000
0 – 50
1 – 100

Estimated Future Cost

₹1,79,085

A basket of goods costing ₹1,00,000 today will cost ₹1,79,085 in 10 years.

Original Amount
₹1,00,000
Inflation Assumption
6%
Cumulative Price Rise
79.08%
Investment Period
10 years

Working

₹100000 × (1 + 6 ÷ 100)⁵ = ₹179084.77 (over 10 years)

This is a mathematical projection using the constant inflation rate you enter. Actual future inflation rates can vary.

About this calculator

Inflation represents the rate at which the general level of prices for goods and services rises, eroding purchasing power over time. This calculator projects what today’s basket of goods will cost in the future, or extracts what a future sum of money represents in today’s real value under constant inflation.

How to use this calculator

  1. Choose the inflation mode

    Select "Future cost" to see what a purchase today will cost in the future, "Purchasing power" to see how much today’s cash will buy in the future, or "Past value" for backward calculations.

  2. Enter the base cash amount

    Input your core starting principal—such as your current budget, salary package, or a planned future retirement nest egg.

  3. Set the annual inflation rate percentage

    Input your expected average annual inflation rate. For historical perspective, average consumer price index (CPI) rates can be used.

  4. Set the period and review the erosion

    Select the time period in years. Review the final adjusted purchasing power and the total cumulative compounding price increase.

Formula

Future Cost = Present Value × (1 + r)ᵗ
  • Present Value is the initial sum of money or cost today.
  • r is the average annual inflation rate as a decimal (e.g. 5% becomes 0.05).
  • t is the duration in years.
  • Under "Purchasing power" mode, the formula is inverted: Future Value = Present Value ÷ (1 + r)ᵗ, showing cash value eroding over time.

Worked example

Inputs

  • Base amount (PV): ₹10,000 (or $10,000)
  • Annual inflation rate: 5%
  • Duration: 10 years
  • Mode: Future cost of goods

Calculation

r = 5% = 0.05 t = 10 years Adjusted Future Cost: Cost = 10000 * (1 + 0.05)¹⁰ = 10000 * (1.05)¹⁰ = 10000 * 1.628895 = ₹16,289

A basket of groceries costing ₹10,000 today will require ₹16,289 in 10 years under a constant 5% annual inflation rate.

What the result means

  • Original Amount is the simple starting cash balance you enter before any inflation is compounded.
  • Adjusted Amount is the final buying power (or cost) of that cash after years of compounding price rises.
  • Cumulative Inflation represents the total percentage price rise over the full duration (e.g. a 62.89% total increase in our example).
  • Actual inflation is volatile. Long-term calculations are projections, as CPI rates fluctuate quarterly based on macro-economic cycles.

Related calculations

  • Project your required retirement nest egg at age 60 under a 6% long-term inflation rate to see your actual future cost of living.
  • Compare how much a fixed cash salary package (e.g. ₹10 Lakhs) loses in actual purchasing power if you do not receive annual appraisals.
  • Find out what a ₹10,00,000 future inheritance is worth in real, present-day terms when discounted by a 5% inflation factor.

Frequently asked questions

What is inflation and how does it affect my money?

Inflation is the gradual decrease in the purchasing power of a currency, represented as an annual percentage price increase across a basket of goods and services. When inflation is positive, every unit of currency buys a smaller fraction of a good over time. This means cash left sitting under a mattress or in a zero-interest account steadily loses its real value.

Why does the inflation calculator use compounding interest?

Inflation behaves like compounding interest in reverse. When prices rise by 5% this year, next year’s 5% rise is calculated on top of that already inflated price basis. Over short periods, this effect is subtle, but over 10 to 20 years, compound inflation creates massive, exponential price increases.

What is the CPI and how does it relate to inflation?

The Consumer Price Index (CPI) is a primary macroeconomic indicator that measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. Government central banks (like the RBI in India or the Fed in the US) track the CPI to adjust interest rates and manage inflation targets.

Does this calculator provide historical inflation rates?

No, this is a mathematical projection calculator that uses a constant annual inflation percentage that you input manually. Real historical inflation rates are highly volatile and vary year-on-year based on supply-chain bottlenecks, monetary policy, and global commodities pricing.

How do I protect my personal savings against inflation?

To protect your purchasing power against inflation, you must invest your capital in financial assets that historically deliver returns exceeding the rate of inflation (e.g., diversified equity mutual funds, index funds, real estate, or gold). Traditional savings deposits often yield net-negative real returns after tax and inflation.

What is "purchasing power"?

Purchasing power is the value of a currency expressed in terms of the amount of goods or services that one unit of money can buy. It is the direct opposite of inflation. If inflation rises, purchasing power falls. This calculator helps you visualize this decay clearly by showing how much a sum of money today will be worth in real terms years down the road.

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