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
Units Reference
Basic Units
Time
Length
Area
Volume
Mass
Temperature
Power
Speed
Time
Seconds (s, secs)
Minutes (mins)
Hours (hr)
Days
Weeks
Months
Years
Milliseconds (ms)
Microseconds (µs) 
Nanoseconds (ns)
Length
Metric
Meters (m, metres)
Kilometers (km, kilometres)
Centimeters (cm, centimetres)
Millimeters (mm, millimetres)
Micrometers (µm, micrometres)
Nanometers (nm, nanometres)
Imperial
Inches
Feet (ft)
Yards (yd)
Miles (mi)
Furlongs (fur)
Space & Sea
Light years (ly)
Astronomical units (ua)
Nautical Miles (NM)
Fathoms (ftm)
Area
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
Volume
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)
Mass
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)
Temperature
Degrees celsius (°C, ºC, C, degC, celcius)
Degrees fahrenheit (°F, ºF, F, degF, fahrenheit)
Power
Watts (w)
Kilowatts (kW)
Megawatts (MW)
Gigawatts (GW)
Terawatts (TW)
Millliwatts (mW)
Horsepower (hp)
Speed
Meters per second (m/s)
Kilometers per hour (km/h)
Miles per hour (mph)
Knots (kn)
Computer Related
Data Storage
Data Transfer
CSS
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)
Data Transfer
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)
CSS
Pixel (px)
Em
Pt
Note that CSS units are units of length, so you can convert them to and from other units of length, like inches
Science & Math Related
Frequencey
Energy
Angles
Frequencey
Hertz (hz)
Kilohertz (kHz)
Megahertz (MHz)
Gigahertz (GHz)
Terahertz (THz)
Millihertz (mHz)
Microhertz (µHz)
Nanohertz (nHz)
Energy
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)
Angles
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 uses units that it knows about:
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 "Tweak Calculator" sheet (click the cog in the top right corner) > Custom Units.
Custom units must be defined in terms of another supported unit. Creating new base unit types is not currently supported.
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Last updated 8 months ago