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Türkiye Inflation Calculator (CPI)

Rules and data: TürkiyeBy Hesaplayıcı

This calculator carries an amount in Turkish lira from one month to another with the monthly consumer price index (CPI, TÜFE) of TurkStat. Enter the amount and the start month; leave the target month empty to use the last published month. It shows the value in the target month, the total inflation, the average yearly inflation and both index values.

Any day of the month; only the month and the year count. The data starts in January 2003.

Leave it empty for the last month TurkStat has published. Pick a month before the start to carry the amount back in time.

Worked example: 1,000 TRY of January 2025 at the prices of August 2026

Value in the target month

1,521.25 TRY

Total inflation
52.13%
Difference
521.25 TRY
Average yearly inflation
30.34%
Period
19 months
Start month CPI (2003=100)
2,819.65
Target month CPI (2003=100)
4,289.4
Step by step

  1. CPI on the 2003=100 base (2026-08) = CPI (2025=100) × 2025 average (2003=100) / 100

    134.75 × 31.8322916667 = 4,289.4

  2. Value in the target month

    value at the target month = amount × CPI (2026-08) / CPI (2025-01)

    value at the target month = 1,000 × 4,289.4 / 2,819.65 = 1,521.25

  3. Total inflation

    total inflation = CPI (2026-08) / CPI (2025-01) − 1

    total inflation = 4,289.4 / 2,819.65 − 1 = 52.13% = 52.13%

  4. Average yearly inflation

    average yearly inflation = (1 + total inflation)^(12 / months) − 1

    average yearly inflation = (1 + 52.13%)^(12 / 19) − 1 = 30.34%

finance.inflation.tr

How to use

  1. Enter the amount in Turkish lira.
  2. Pick any day of the start month. Only the month and the year count; the data starts in January 2003.
  3. Pick any day of the target month, or leave it empty for the last month TurkStat has published.
  4. Press Calculate. If the target month is before the start month, the amount is carried back to the prices of the past.

Formula

The value in the target month is V = A × I₂ / I₁. A is the amount, I₁ the CPI of the start month and I₂ the CPI of the target month.

Total inflation is (I₂ / I₁ − 1) × 100 percent. Average yearly inflation is ((I₂ / I₁)^(12 / n) − 1) × 100, where n is the number of months between the two months.

Since January 2026 the index is on the 2025=100 base. Those index values are converted to the 2003=100 base with one factor: the average of the 2003-based index values of 2025, divided by 100.

Worked example

The worked example on this page shows the first example of the calculator step by step: first the conversion of the 2026 index to the old base, then the value in the target month, the total inflation and the average yearly inflation. The same steps appear in the result box when you calculate with your own values.

Limits

The data starts in January 2003 and ends with the last month TurkStat has published; earlier months and unpublished months are not calculated. The index is monthly, so days do not count. The CPI measures an average consumer basket; your own costs may have changed differently. The calculator does not forecast; use the fixed-rate inflation calculator for that. The amount is rounded to the kuruş and rates to two decimals. All amounts are in Turkish lira.

Frequently Asked Questions

How do I find what an old amount in Turkish lira is worth today?

Multiply the amount by the CPI of the target month divided by the CPI of the start month. For example, 1,000 TRY of January 2025 is 1,521.25 TRY at the prices of August 2026; total inflation between them is 52.13%.

How is inflation between two dates calculated?

Divide the index of the target month by the index of the start month and subtract 1. Adding monthly rates gives a wrong result, because the rates compound; the ratio of the indices is the correct figure.

Why did the Turkish CPI drop to values near 100 in 2026?

TurkStat changed the base of the index from 2003=100 to 2025=100 in January 2026. Past inflation rates did not change. The calculator links the two bases with the 2025 average and shows that step.

Why can I not pick the current month?

TurkStat publishes a month’s index in the first days of the next month. A month that is not published cannot be calculated; leave the target empty to use the last published month.

Calculation rules

  • The calculation uses TurkStat’s monthly consumer price index (CPI, TÜFE): value = amount × index of the target month / index of the start month. Days do not count; the index is monthly.
  • TurkStat moved the index from the 2003=100 base to 2025=100 in January 2026 and did not revise past rates. Indices from 2026 on are converted to the old base with the average of the 2003-based indices of 2025 / 100; that is how a period across the two bases is computed.
  • The amount is rounded to the kuruş, rates and indices to two decimals. The average yearly inflation is the compound yearly rate that gives the total change.
  • A month that is not published yet cannot be chosen; TurkStat publishes a month’s index early in the next month. The CPI measures an average basket; your own costs may have changed differently.
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