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)

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

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.