Units & Conversions
We have over 200 built-in commonly used units. Add more if you need them.
To convert units in Soulver use to or in or as followed by the unit you wish to convert into.
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

Units Reference

Basic Units

Time
Length
Area
Volume
Mass
Temperature
Power
Speed
  • Seconds (s, secs)
  • Minutes (mins)
  • Hours (hr)
  • Days
  • Weeks
  • Months
  • Years
  • Milliseconds (ms)
  • Microseconds (µs)
  • Nanoseconds (ns)
Metric
  • Meters (m, metres)
  • Kilometers (km, kilometres)
  • Centimeters (cm, centimetres)
  • Millimeters (mm, millimetres)
  • Micrometers (µm, micrometres)
  • Nanometers (nm, nanometres)
Imperial
  • Inches (in)
  • Feet (ft)
  • Yards (yd)
  • Miles (mi)
  • Furlongs (fur)
Space & Sea
  • Light years (ly)
  • Nautical Miles (NM)
  • Fathoms (ftm)
Metric
  • Square meters (m², m^2, m2)
  • Square kilometers (km², km^2, km2)
  • Square centimeters (cm², cm^2, cm2)
  • Square millimeters (mm², mm^2, mm2)
  • Square micrometers (µm², µm^2, µm2)
Imperial
  • Square Inches (in², sqin, in^2, in2)
  • Square feet (ft², sqft, ft^2, ft2)
  • Square yard (yd², sqyd, yd^2, yd2)
  • Square mile (mi², sqmi, mi^2, mi2)
Land
  • Acre (ac)
  • Hectare (ha)
  • Ares
Metric
  • Liters (L, liters, litres)
  • Kiloliters (kL)
  • Megaliters (ML)
  • Milliliters (mL)
  • Cubic Meters (m³, m3, m^3)
  • Cubic Kilometers (km³, km3, km^3)
  • Cubic Centimeters (cm³, cm3, cm^3)
  • Cubic Millimeters (mm³, mm3, mm^3)
  • Metric Cups (1 cup = 250 ml)
Imperial
  • Cubic Inches (in³, in3, in^3)
  • Cubic Feet (ft³, cuft, ft³, ft3,ft^3)
  • Cubic Yards (yd³, yd³, cuyd, yd3, yd^3)
  • Cubic Miles (mi³, mi³, mi3, mi^3, miles^3)
US Customary
  • Fluid ounces (fl oz)
  • Pints
  • Cups
  • Teaspoons (tsp)
  • Tablespoons (tbsp)
  • Quarts (qt)
  • Gallons (gal)
In Soulver's Units preferences you can choose whether US customary or imperial measurements are used for these units. Note that a "cup" is always the US customary cup. Use "metric cup" for the cup unit commonly used in Australia, NZ and Canada (250ml).
Other
  • Acre feet (af)
  • Bushels (bsh)
Metric
  • Grams (g)
  • Kilogram (kg)
  • Milligram (mg)
  • Nanogram (ng)
  • Metric Tons (t)
Imperial
  • Ounces (oz)
  • Pounds (lb)
  • Stones (st)
  • Short Tons (ton)
Precious Metals
  • Carats (ct)
  • Ounces troy (oz t)
  • Degrees celsius (°C, ºC, C, degC, celcius)
  • Degrees fahrenheit (°F, ºF, F, degF, fahrenheit)
  • Watts (w)
  • Kilowatts (kW)
  • Megawatts (MW)
  • Gigawatts (GW)
  • Terawatts (TW)
  • Millliwatts (mW)
  • Horsepower (hp)
  • Meters per second (m/s)
  • Kilometers per hour (km/h)
  • Miles per hour (mph)
  • Knots (kn)
Data Storage
Data Transfer
CSS
Units like GB, MB, kB, etc are in base 10 (1 GB = 1000 MB)
Units like GiB, MiB, KiB, etc are in base 2 (1 GiB = 1024 MiB)
See here for more information on the SI standard with regards to units of data storage.
  • Bytes (B)
  • Bits (bit)
  • Yottabytes (YB)
  • Zettabytes (ZB)
  • Exabytes (EB)
  • Petabytes (PB)
  • Terabytes (TB)
  • Gigabytes (GB)
  • Megabytes (MB)
  • Kilobytes (kB)
  • Yottabits (Yb)
  • Zettabits (Zb)
  • Exabits (Eb)
  • Petabits (Pb)
  • Terabits (Tb)
  • Gigabits (Gb)
  • Megabits (Mb)
  • Kilobits (kb)
  • Yobibytes (YiB)
  • Zebibytes (ZiB)
  • Exbibytes (EiB)
  • Pebibytes (PiB)
  • Tebibytes (TiB)
  • Gibibytes (GiB)
  • Mebibytes (MiB)
  • Kibibytes (KiB)
  • Yobibits (Yib)
  • Zebibits (Zib)
  • Exbibits (Eib)
  • Pebibits (Pib)
  • Tebibits (Tib)
  • Gibibits (Gib)
  • Mebibits (Mib)
  • Kibibits (Kib)
  • Bytes per second (Bps)
  • Bits per second (bps)
  • Yottabytes per second (YBps)
  • Zettabytes per second (ZBps)
  • Exabytes per second (EBps)
  • Petabytes per second (PBps)
  • Terabytes per second (TBps)
  • Gigabytes per second (GBp)
  • Megabytes per second (MBp)
  • Kilobytes per second (KBp)
  • Yottabits per second (Ybps)
  • Zettabits per second (Zbps)
  • Exabits per second (Ebps)
  • Petabits per second (Pbp)
  • Terabits per second (Tbp)
  • Gigabits per second (Gbp)
  • Megabits per second (Mbp)
  • Kilobits per second (Kbp)
  • Yobibytes per second (YiBps)
  • Zebibytes per second (ZiBps)
  • Exbibytes per second (EiBps)
  • Pebibytes per second (PiBps)
  • Tebibytes per second (TiBps)
  • Gibibytes per second (GiBps)
  • Mebibytes per second (MiBps)
  • Kibibytes per second (KiBps)
  • Yobibits per second (Yibps)
  • Zebibits per second (Zibps)
  • Exbibits per second (Eibps)
  • Pebibits per second (Pibps)
  • Tebibits per second (Tibps)
  • Gibibits per second (Gibps)
  • Mebibits per second (Mibps)
  • Kibibits per second (Kibps)
  • Pixel (px) - defined as 1⁄96 inch (0.26 mm)
  • Em
  • Pt
Note that CSS units are units of length, so you can convert them to and from other units of length, like inches
Frequencey
Energy
Angles
  • Hertz (hz)
  • Kilohertz (kHz)
  • Megahertz (MHz)
  • Gigahertz (GHz)
  • Terahertz (THz)
  • Millihertz (mHz)
  • Microhertz (µHz)
  • Nanohertz (nHz)
  • Joules (J)
  • Kilojoules (kJ)
  • Megajoules (MJ)
  • Gigajoules (GJ)
  • Calories (cal)
  • Kilocalories (kCal)
  • Watt seconds (W s)
  • Watt minutes (W m)
  • Watt hours (Wh)
  • Kilowatt hours (kWh)
  • Megawatt hours (MWh)
  • Gigawatt hours (GWh)
  • Terawatt hours (TWh)
  • Degrees (°)
  • Radians (rad)
Note that trigonometric functions assume radians by default.
sin (90) = 0.8939966636
sin (90 degrees) = 1

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.
300 + 20 km | 320 km
$20 + 30 | $50.00

Adding & Subtracting Mixed Units

When doing calculations with mixed unit types, the larger unit wins:
1km + 1,000m | 2 km
When units don't share a common base unit, the last used unit wins:
$200 + €200 | €308.84

Multiplying Units

Soulver only supports units that have been defined in its math engine:
10m × 10m | 100 m² // a supported unit
3 kg × 3 liters | // Soulver will not give you "9 kg liters" here
Soulver will instead make an implicit rate when a supported unit cannot be created through multiplication:
$30 × 4 days | $120.00
// the above is interpreted as $30/day × 4 days

Unit Formatting

Soulver will use a unit's symbol in the answer, rather than its full name. Though you may use the full name in your expression:
10 kilometers in meters | 10,000 m
20 tablespoons in teaspoons | 60 tsp

Adding Additional Units

You can add additional units to Soulver in the Calculator > Custom units preferences.
Custom units must be defined in terms of an existing unit.