approximately
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approximately
Indicates that a number, quantity, or time is only approximate and not exact. Synonymous with 'ungefähr' (approximately) or 'etwa' (about).
Die Fahrt zum Flughafen dauert circa 45 Minuten.
The trip to the airport takes approximately 45 minutes.
In written communication, notes, and many texts, 'circa' is almost always abbreviated as 'ca.'. The pronunciation, however, remains 'circa'.
Für das Rezept braucht man ca. 200 g Mehl.
For the recipe, you need approx. 200 g of flour.
'Circa' (approximately) normally stands directly before the number or quantity it refers to.
Die Reparatur wird circa zwei Stunden dauern.
The repair will take approximately two hours.
'Circa' comes from Latin and often sounds somewhat more formal or technical. In everyday language, 'ungefähr' (approximately) or 'etwa' (about) are used more often.
Die Entfernung beträgt circa 15 Kilometer.
The distance is approximately 15 kilometers.
at / around / in order to
'um' and 'circa' can both show that a statement is only approximate. 'circa' stands directly with numbers, quantities, or times and clearly means 'approximately'. 'um' also has this meaning, especially in expressions like 'um die 100 Euro' (around 100 euros) or with approximate times. The words can be confused because both can stand with numbers. But 'um' is much broader as a preposition: 'um acht Uhr' can be an exact time, while 'circa acht Uhr' is always approximate.
Heute dauert die Reparatur circa eine Stunde.
Today the repair takes approximately one hour.
Ali lernt jeden Tag um die zwei Stunden für die Prüfung.
Ali studies for the exam for around two hours every day.