German inflation calculator to factor inflation into any calculation

This inflation calculator 2025 allows you to compare prices or assets from the past with values from subsequent years. The calculations are based on the official consumer price index (CPI) for Germany.

How would your salary need to change to offset inflation? Let's assume you received a monthly salary of €2,300 in 2020. To offset inflation, your salary would have to rise to €2,744 in 2024. Enter your values in the inflation calculator. Did you buy shares in previous years? Then you can compare the development of the share value with the general price development. Or suppose you purchased real estate in previous years. How high could the price of this property be in 2025 as a result of inflation alone? However, it should be noted that the result generally does not correspond to the current market price of the property. This may be higher or lower and depends heavily on property price trends, the location, and the situation of the property.

Inflation calculation in German family law

Let's say you got married in the year 2002 and had assets worth 10,000 euros. How much are these assets worth in 2025? This calculator allows you to figure out the real price of your assets based on the official consumer price index (CPI) in Germany.

When calculating your Equalization of Accrued Gains ("Zugewinnausgleich"), you have to consider how inflation has affected the value of your assets. The initials assets, brought into the marriage on the wedding day, change value over time according to the inflation rate. The price increase is defined by the CPI difference between the starting and the ending date of the relevant period.

Inflation Calculator 2025 online

The period to be considered is determined by entering the first and last year. The smallest period to be considered is one year. For the first year, enter the value whose performance is to be considered. This value and the calculated value for the last year refer to the end of the year. The calculated issued value for the last year indicates how much the value has increased in the first year due to inflation or possibly decreased as a result of deflation. As an additional note, the current consumer price index (CPI) for the first and last year relative to the base year 2020 is also displayed. You can choose whether the values should be entered or output in euros (€) or German marks (DM).

If the last year entered is the actual year 2025, the inflation rate and consumer index (CPI) for that year are calculated from the current published monthly inflation rates. If the entered last year is later than the actual year 2025, the inflation rate for coming years is estimated. In this case, a note is displayed with the years used for the estimate.

Enter current values and select [Calculate]:

Related to the value entered in the first year, the purchasing power indicates the real value at the end of the last year. The calculated price rise is defined as the percentage change in prices between the starting and ending date of the relevant period. The average inflation rate per year indicates the percentage by which the prices have risen on an average per year. Negative percentage values indicate deflation in the period under review (1948–1950, 1953, and 1986). Last year's inflation rate indicates by how many percent prices have increased from the beginning to the end of last year. For the years after 2025 onwards, last year's inflation rate is the estimated value.

How to calculate average inflation rate per year

The average inflation rate spent per year applied to the amount in the first year and in each case to the resulting price increases of all subsequent years results in the amount spent in the last year. The average inflation rate per year I is calculated from the geometric mean of all consumer price indices (CPI) in the period under consideration over n years with i = 1 ... n:

x_i = CPI_i+1 / CPI_i
I = ((x₁ * x₂ * ... * x_n) ^1/n) - 1) * 100.

For the years 2017 to 2020, for example, n = 3 results in an average inflation rate I of:

x₁ = CPI₂₀₁₈ / CPI₂₀₁₇ = 98,1 / 96,4 = 1,0176
x₂ = CPI₂₀₁₉ / CPI₂₀₁₈ = 99,5 / 98,1 = 1,0143
x₃ = CPI₂₀₂₀ / CPI₂₀₁₉ = 100,0 / 99,5 = 1,0050
m = x₁ * x₂ * x₃ = 1,0373
I = (m^1/n - 1) * 100 = 1,23 %

The average inflation rate of 1.23% applied to the value of € 1,000 in the first year and to each of the following 2 years results in a price increase of € 1,037.35 in the last year:

2018: 1.23 % von € 1,000.00 = € 12.30
2019: 1.23 % von € 1,012.30 = € 12.45
2020: 1.23 % von € 1,024.75 = € 12.60

This results in a price increase of € 1,024.75 + € 12.60 = € 1,037.35. Due to rounding errors, a small deviation occurs compared to the result from the calculation of the price rise from the consumer price index (CPI).

Estimation of the inflation rate for coming years

If the last year entered in the inflation calculator is later than the year , the inflation rate for the coming years is estimated. For this purpose, the historical consumer price indices (CPI) of the past years are used according to the number of future years. For this past period, the average inflation rate per year and the resulting consumer price index (CPI) for the most recent year are output. In the case of estimated data, a note is displayed in the inflation calculator with the annual figures used for the estimate.