Converting Units

Use to or in or as to convert into a particular unit.

See all the available units in the Unit Reference.

The examples on this page use the dot as the decimal point (see Decimal Point & Thousands Separators).

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Calculation example

Calculation	Result
110 km in m	10,000 m
23 weeks in days	21 days
3100 pounds in kg	45.36 kg

Wrapping a Value in a Unit

When the left-hand side is a plain number or an expression with no source unit, in <unit> (or just the unit, with no in) attaches the unit without conversion. This works for variables, parenthesised expressions, and user-function parameters.

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Calculation example

Calculation	Result
120 in EUR	€20
2(5 + 3) m	8 m
350 in km	50 km

Mixing Units & Plain Numbers

When mixing plain numbers with units, the nearest unit will be used automatically.

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Calculation example

Calculation	Result
1300 + 20 km	320 km
2$20 + 30	$50

Adding & Subtracting Mixed Units

Adding different units of the same kind answers in the larger unit, whichever order you type them in. Subtracting keeps the first unit. Use in <unit> to choose a different unit.

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Calculation example

Calculation	Result
11 km + 300 m	1.30 km
2500 ml + 1 L	1.50 L
31 L + 500 ml	1.50 L
41 cm - 1 m	-99 cm
51 km + 300 m in m	1,300 m

Durations have their own rules, see Durations.

Currencies

Adding different currencies answers in the last currency, and subtracting keeps the first. The results below use illustrative rates; live currency results vary with the app’s current rates.

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Calculation example

Calculation	Result
15 USD + 3 EUR	€7.55
25 EUR - 3 USD	€2.27
35 GBP + 3 EUR in USD	$9.73

Feet and Inches, Pounds and Ounces

Feet and inches, and pounds and ounces, show as a breakdown:

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Calculation example

Calculation	Result
15 ft + 3 in	5 feet 3 inches
263 inches	5 feet 3 inches
31 lb + 8 oz	1 lb 8 oz
420 oz	1 lb 4 oz

Convert with in feet and inches or in pounds and ounces. For a decimal, write in ft or use a fraction:

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Calculation example

Calculation	Result
1190.5 cm in feet and inches	6 feet 3 inches
25 ft 11 in in cm	180.34 cm
363 inches in ft	5.25 feet
41/3 ft	0.33 feet

Multiplying Units

Multiplying lengths gives an area or a volume, and powers of a length work too:

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Calculation example

Calculation	Result
110m x 10m	100 m²
22 m * 30 cm	0.60 m²
3(4 m)^2	16 m²
4(2 km)^3	8 km³

Multiplying two amounts of another kind, such as 2 kg * 3 kg, shows nothing.

An implicit rate will be made when a supported unit cannot be created through multiplication:

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Calculation example

Calculation	Result
1$30 × 4 days	$120

Dividing Units

Dividing two amounts of the same kind gives a plain number, and dividing a distance by a time gives a speed. Multiply a speed by a time to get a distance:

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Calculation example

Calculation	Result
16 kg / 2 kg	3
21200 EUR / 400 EUR	3
3100 km / 2 h	50 km/h
450 km/h * 3 h	150 km

Combining Different Kinds of Units

Multiplying or dividing two different kinds of units gives the unit you’d expect, when the line is just that one step:

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Calculation example

Calculation	Result
15 V * 2 amps	10 W
22 kW * 3 h	6 kWh
36 kWh / 3 kW	2 hours
410 N * 2 m	20 N⋅m
51 GB / 100 Mbps	80 seconds
612 V * 2 Ah in Wh	24 Wh

In a longer calculation such a step shows nothing. Put it in a variable first:

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Calculation example

Calculation	Result
15 V * 2 amps * 3 h
2p = 5 V * 2 amps	10 W
3p * 3 h	30 Wh

Related kinds also convert into each other:

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Calculation example

Calculation	Result
11 Hz in rpm	60 rpm
210 Nm in J	10 J
32 Ω in siemens	0.50 siemens