Inflation Calculator: Buying Power Over Time
Published July 18, 2026By Samson PG
At 5% inflation, today’s ₹100 needs about ₹163 in 10 years for the same basket. Inflation calculators make that erosion visible.
Inflation raises the general price level. An inflation calculator answers either: what will today’s basket cost later? or what is a future (or past) amount worth in today’s money?
Illustrative only — not investment or policy advice. CPI baskets and personal spending differ from any single rate.
Future cost of a basket
future cost = present cost × (1 + i)^t
i = annual inflation (decimal), t = years.
Example: ₹100 today, 5% for 10 years → 100 × 1.05^10 ≈ ₹162.89.
Real (inflation-adjusted) value
real value = nominal / (1 + i)^t
₹162.89 in ten years at 5% inflation ≈ ₹100 of today’s buying power in this model.
Why savers care
| Nominal story | Real story |
|---|---|
| FD pays 6% | If inflation is 5%, real is thin |
| Salary rose 8% | If inflation is 6%, real gain ≈ 2% (approx.) |
Pair with SIP or compound interest scenarios when you want nominal growth vs real goals — still assumptions, not forecasts.
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Use TryCalculatingNow Inflation Calculator
TryCalculatingNow Inflation Calculator converts present ↔ future buying power for a rate and timeline you choose. Sibling: savings goal calculator for months-to-target planning.
FAQ
Is CPI the same as my personal inflation?
Not exactly — your mix of rent, food, and fuel may diverge from the index.
Can inflation be negative?
Yes (deflation); formulas still apply with negative i.
Should I use monthly inflation?
Annual effective rates are common in calculators; convert carefully if you start from monthly CPI changes.
Does this predict markets?
No — it only rescales currency by an assumed inflation path.