
anderthalb
one and a half
A numeral that describes the amount 'one and a half' (1.5).
Der Film dauert anderthalb Stunden.
The film lasts one and a half hours.
one and a half
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one and a half
A numeral that describes the amount 'one and a half' (1.5).
Der Film dauert anderthalb Stunden.
The film lasts one and a half hours.
The word 'anderthalb' (one and a half) comes from an older form of the language. 'Ander' used to mean 'the second.' So 'anderthalb' literally means 'the second half,' meaning: one whole and half of the second.
Für das Rezept brauche ich anderthalb Liter Milch.
For the recipe, I need one and a half liters of milk.
'Anderthalb' (one and a half) is a numeral that is not declined; it always keeps this form. The following noun is in the plural if it is countable.
Wir haben anderthalb Stunden auf den Bus gewartet.
We waited one and a half hours for the bus.
'Anderthalb' (one and a half) is very often used with units of time, weight, or measurement.
Er isst jeden Morgen anderthalb Brötchen zum Frühstück.
He eats one and a half rolls for breakfast every morning.
one and a half
Anderthalb and eineinhalb refer to the same amount: one and a half, or 1.5. Based on the meanings given, there is no difference in meaning. Both forms therefore work with the same quantity, for example when referring to a duration or number.

Die Fahrt dauert anderthalb Stunden.
The journey takes one and a half hours.
Die Fahrt dauert eineinhalb Stunden.
The journey takes one and a half hours.