Germany: before 1991 this is West Germany, and before 1948 it is a reconstruction
The German series looks continuous from 1924 to today. It is not one index, and the joins matter more than the start date.
Only from 1991 does it follow the official all-Germany Verbraucherpreisindex. The segment from June 1948 to 1990 covers West Germany alone, and the years from 1924 to 1947 are an annual reconstruction rather than a published index. A conversion from 1960 therefore answers what a West German household paid; there is no consumer price index for the GDR in this data, and none that would chain to it.
The 1948 join is a currency reform, not just a change of source. The Deutsche Mark arrived on 20 June 1948: wages, rents and pensions converted one for one, while savings ultimately settled at 6.50 DM per 100 Reichsmark. The series shows a 17.5% rise in 1949 and a 6.2% fall in 1950, which is price liberalisation and its correction straddling that seam rather than ordinary inflation.
Nothing crosses 1923, and the numbers show why
The series begins after the hyperinflation because no index could survive it. A loaf of bread cost 0.80 Mark in December 1919, 250 Mark by January 1923, 174 million in October and 201 billion in November. A dollar bought 4.2 trillion Mark.
The Rentenmark ended it on 15 November 1923 at one Rentenmark to a trillion papermarks, and the Reichsmark followed in 1924. There is no meaningful way to convert a 1922 amount into today's money: the question assumes a stable unit, and Germany did not have one.
Check which basis a remembered figure is on
German inflation in autumn 2022 is widely remembered as 10.4%. That was published on the old 2015=100 basis. On the current 2020=100 basis the monthly peak is 8.8%, and the 2022 annual rate was revised from 7.9% to 6.9%.
Both are correct on their own basis, and this page uses the current one. The same care applies to the national VPI against the European HVPI: the VPI includes imputed rent for owner-occupiers and the broadcasting fee, the HVPI does not, and since January 2026 they no longer even share a classification. For the oil shocks, this series gives 1973 at 7.1%, its West German high.