"Back in My Day" Price Verifier
CPI-based Past → Present Price Conversion
Price Information
년
₩
Results
Converted to today's value
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This is what it equals today
FAQ
How does the Latte Price Converter calculate results?
It uses Korea's Consumer Price Index (CPI). The original amount is multiplied by (current CPI ÷ past CPI) to get the present value. CPI data is based on Statistics Korea's 2020=100 baseline.
What is the Consumer Price Index (CPI)?
The CPI measures price changes for goods and services consumed by typical households. Statistics Korea surveys approximately 460 items monthly to calculate it — a key benchmark for tracking inflation.
Why does the official inflation rate differ from what I feel?
The CPI is an average across 460 items, so it may differ from what individuals perceive — especially those who spend heavily on food and dining out. Categories like real estate and education are not fully reflected, making felt inflation seem higher.
How is the annual inflation rate calculated?
It's the annualized rate of the price multiplier. For example, if prices tripled over 30 years, the annual inflation rate = (3^(1/30) - 1) × 100 ≈ 3.7%. This follows the same compound interest formula.
How are CPI values for in-between years estimated?
CPI data points (available in 5-year intervals) are estimated using linear interpolation. For example, 1992 is calculated as the 40% point between the 1990 and 1995 CPI values.
Are the item preset prices accurate?
The presets use approximate representative prices from those years. Actual prices varied by region, brand, and time. You can enter a custom amount for a more precise calculation.
Can I share my result with someone via URL?
Yes! The calculation inputs are saved as URL parameters, so anyone with the link will see the same inputs and results instantly.