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+# Unit notation
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+
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+Most units can be entered in the same way that they would appear in textbook calculations. They
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+usually have a long form (`meter`, `degrees`, `byte`, …), a plural form (`meters`, `degrees`, `bytes`),
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+and a short alias (`m`, `°`, `B`). For a full list of supported units, see
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+[this page](./list-units.md).
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+
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+All SI-accepted units support [metric prefixes](https://en.wikipedia.org/wiki/Metric_prefix) (`mm`, `cm`, `km`, ... or `millimeter`, `centimeter`, `kilometer`, ...)
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+and — where sensible — units allow for [binary prefixes](https://en.wikipedia.org/wiki/Binary_prefix) (`MiB`, `GiB`, ... or `mebibyte`, `gibibyte`, ...). Note
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+that the short-form prefixes can only be used with the short version of the unit, and vice versa (that is: `kmeter` and `kilom` are *not* allowed, only `km` and `kilometer`).
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+
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+Units can be combined using [mathematical operations](./operators.md) such as multiplication, division and exponentiation: `kg * m/s^2`, `km/h`, `m²`, `meter per second`.
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+
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+The following snippet shows various styles of entering units:
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+```nbt
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+2 min + 1 s
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+150 cm
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+sin(30°)
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+50 mph
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+6 MiB
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+
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+2 minutes + 1 second
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+150 centimeters
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+sin(30 degrees)
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+50 miles per hour
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+6 mebibyte
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+```
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+
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+Note that Numbat also allows you to [define new units](./unit-definitions.md).
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David Peter