Planning • Purchasing-power scenario
Inflation Calculator
Estimate how much a cost stated in today's rupees could become after a chosen number of years under a constant annual inflation assumption.
Enter your scenario
How to use the calculator
- Enter the current cost of the goal or expense.
- Choose an inflation scenario.
- Enter the time until the expense is expected.
- Review the future equivalent and additional rupees needed.
- Repeat with lower and higher assumptions.
Formula and assumptions
Future cost = present cost × (1 + inflation rate)years
Extra amount = future cost − present cost
The rate is converted from a percentage to a decimal. The model assumes a constant annual compound rate and rounds currency to the nearest rupee.
Worked Indian example
A course costs ₹1,00,000 today. At an illustrative 6% annual inflation for 10 years:
| Present cost | ₹1,00,000 |
|---|---|
| Future equivalent | ₹1,79,085 |
| Extra rupees needed | ₹79,085 |
The result does not mean the course will definitely cost that amount. It shows what constant 6% compounding would imply.
What the result means
Inflation reduces what a fixed rupee amount can buy. The calculator expresses that effect as a higher future price. It does not calculate the return your savings need after tax or risk.
Common mistakes
- Assuming every category has one inflation rate.
- Using nominal investment returns without considering inflation.
- Keeping the goal amount unchanged for many years.
- Treating a historical average as a forecast.
Practical planning tips
- Use category-specific estimates where credible.
- Test a range rather than one rate.
- Review the target annually.
- Keep short-term goals separate from retirement assumptions.
- Compare nominal and inflation-adjusted progress.
Related calculators and guides
Frequently asked questions
What does this calculator estimate?
A future equivalent cost and extra amount needed.
Does every expense rise equally?
No.
Is the rate a forecast?
No, it is your scenario.
Can inflation be zero?
Yes.
Why is inflation compounded?
Each increase builds on the previous year's cost.
Does it show purchasing power?
It expresses purchasing-power pressure as a future equivalent cost.
Can it plan retirement alone?
No. Retirement needs more assumptions.
Is this advice?
No.
Educational disclaimer
This is a simplified educational scenario, not an inflation forecast or personalized financial advice. Actual category prices can rise, fall or remain stable. Update assumptions using credible current information.