Inflation Calculator
See how inflation changes the value of money over time.
Updates as you type.
What an Inflation Calculator Tells You
Inflation is the steady rise in the general price level of goods and services over time. When prices rise, each rupee buys less than it did before, meaning your money loses purchasing power. An inflation calculator helps you visualise this erosion by projecting what something that costs a certain amount today will cost in the future, or by showing how much your savings will really be worth years from now.
For example, if a family's monthly grocery bill is ₹20,000 today and inflation averages 6% per year, that same basket of goods could cost over ₹35,800 in ten years. The groceries have not changed, but you need far more rupees to buy them. Understanding this is essential for retirement planning, setting financial goals, and deciding how to invest so your wealth keeps pace with rising costs.
The Inflation Formula and How It Works
The core calculation uses compound growth, because inflation builds on itself year after year, just like compound interest. The formula is:
Future Cost = Present Cost × (1 + Inflation Rate)Years
Here the inflation rate is written as a decimal, so 6% becomes 0.06. The exponent is the number of years into the future you want to project.
Suppose a car costs ₹8,00,000 today and you expect 5% annual inflation over the next 7 years. The future cost would be:
Future Cost = ₹8,00,000 × (1 + 0.05)7 = ₹8,00,000 × 1.4071 = ₹11,25,680
To work the other way and find today's equivalent value of a future amount, you divide instead: Present Value = Future Amount ÷ (1 + Inflation Rate)Years. This reveals how much a future sum is really worth in today's money.
How Inflation Erodes Purchasing Power
Purchasing power is simply how much your money can actually buy. Even a modest inflation rate compounds into a large gap over decades. At 6% inflation, prices roughly double every 12 years, meaning ₹1,00,000 today would have the buying power of only about ₹50,000 in 12 years if it sits idle in cash.
This is why keeping all your money in a low-interest savings account can quietly shrink your wealth in real terms. If your savings earn 4% but inflation runs at 6%, your real return is negative 2% per year. To protect and grow purchasing power, the returns on your investments need to outpace inflation. Equities, diversified mutual funds, and certain inflation-linked instruments are commonly used for this purpose, though every option carries its own risk profile.
The longer your money sits idle, the harsher the effect. ₹5,00,000 left as cash for 20 years at 6% inflation would hold the buying power of roughly ₹1,55,000 in today's terms, a loss of nearly 70% of its real value. Treating inflation as a constant background cost, rather than an occasional concern, is the mindset that protects long-term savers.
Using the Results Wisely
When planning long-term goals like a child's education or retirement, always inflate today's costs to their future value before deciding how much to save. A goal that looks affordable in today's prices can be much larger in future rupees. Imagine a college course that costs ₹10,00,000 today; at 8% education inflation, in 15 years it could cost over ₹31,70,000. Saving only for today's price would leave a large shortfall.
Run the calculator with a few different inflation assumptions, such as 4%, 6%, and 8%, to build a realistic range rather than relying on a single guess. Different categories inflate at different speeds, so use higher rates for education and healthcare and more moderate ones for everyday expenses. Reviewing your plan every couple of years keeps it aligned with actual price trends, and adjusting your monthly savings as costs evolve ensures you stay on track to meet each goal in real terms rather than just on paper.
Frequently Asked Questions
For long-term planning in India, many people use an assumption of around 5% to 7% per year, which reflects historical averages for general consumer prices. Education and healthcare costs often rise faster, so you may want to use a higher rate of 8% to 10% for those specific goals. Running your numbers with a range of rates gives a more realistic picture than a single figure.
Interest is the return your money earns, while inflation is the rate at which prices rise. The difference between them is your real return. If you earn 7% interest but inflation is 6%, your real return is only about 1%. To genuinely grow your wealth, your returns must exceed the inflation rate.
Inflation compounds because each year's price rise is applied on top of the already-increased prices from previous years, not on the original amount. This is why the formula uses an exponent for the number of years. Compounding makes the long-term effect much larger than simple year-by-year addition would suggest.
Yes. To see what a past amount is worth today, treat the older amount as the present cost and apply the average inflation rate for the number of years that have passed. This shows how much prices have climbed and why older salaries or budgets feel small compared with current ones.
Only if your income rises at least as fast as prices do. If your salary grows 4% but inflation is 6%, your real spending power still falls. This is why negotiating raises that beat inflation and investing surplus money for inflation-beating returns both matter for maintaining your standard of living.
Projections are estimates based on an assumed average rate, and actual inflation varies year to year due to economic conditions, policy, and global events. The calculator is best used as a planning guide rather than a precise prediction. Revisiting your assumptions periodically and adjusting your plan keeps your forecasts realistic.