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For the complete documentation index, see llms.txt. This page is also available as Markdown.

Converting Units

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

10 km in m                    | 10,000 m
5 hours 30 minutes to seconds | 19,800 seconds
100 pounds in kg              | 45.36 kg

Or alternatively:

meters in 10 km  | 10,000 m
days in 3 weeks  | 21 days
seconds in a day | 86,400 s

As a shorthand, you can also type two unit names without values to see the conversion:

"km m" (= 1,000 m)

Soulver uses unit symbols (rather than its full name) in the answer column.

Control-click on an answer to see the full unit name

Pixels and screen density

To convert between pixels and physical measurements, specify the screen density in pixels per inch (ppi):

1 cm in px at 326 ppi → 128.35 px

The same physical length contains more pixels on a higher-density screen.

Notes on Units

Mixing Units & Plain Numbers

When mixing plain numbers with units, the nearest unit will be used automatically. This is called unit assimilation.

Adding & Subtracting Mixed Units

When doing calculations with mixed unit types, the larger unit wins:

When units don't share a common base unit, the last used unit wins:

Multiplying Units

Soulver only supports units that have been pre-defined in its math engine, not compound units that do "not exist":

Soulver will make an implicit rate when a supported unit cannot be created through multiplication:

Creating Custom Units

You can create custom units in the definition sheet and use them across all your sheets and Soulver files.

On Mac, open Settings > Units and click Edit Definition Sheet….

Define a unit in terms of an existing unit:

1 watermelon = 20 lb

Then use it in calculations: 40 lb in watermelons → 2 watermelons. English plural forms are recognized automatically.

You can also create a new unit type:

operation = new unit

Then 3 operations/second × 5 minutes → 900 operations.

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