to convert
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convert
To transfer a value from one unit, currency, or system into a corresponding value in another system.
Können Sie mir bitte diese 100 US-Dollar in Euro umrechnen?
Could you please convert these 100 US dollars into euros for me?
The verb is made up of the prefix 'um-' and the verb 'rechnen' (to calculate). Here, the prefix 'um-' expresses a change or transformation from one system into another.
Ich muss die Maße von Zoll in Zentimeter umrechnen.
I have to convert the measurements from inches into centimeters.
'Umrechnen' (to convert) is a separable verb. In a main clause, the prefix 'um' goes at the end of the sentence. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
Der Kassierer rechnet den Betrag schnell um.
The cashier quickly converts the amount.
The fixed structure is: 'etwas (Akkusativ) in etwas (Akkusativ) umrechnen' (to convert something into something). The preposition 'in' is crucial here for indicating the target system.
Bitte rechne die Temperatur von Fahrenheit in Celsius um.
Please convert the temperature from Fahrenheit into Celsius.
to convert / transform
Umwandeln generally means changing something into another form or state. Umrechnen is more specific: it means determining the corresponding value in another unit, currency, or system. For numerical values, „umrechnen“ is therefore usually the right word; for a general change, use „umwandeln“.
Das Programm rechnet die Temperatur von Celsius in Fahrenheit um.
The program converts the temperature from Celsius to Fahrenheit.
Das Programm wandelt die Temperaturanzeige in eine andere Darstellung um.
The program converts the temperature display into a different format.
