hectokatal
An SI unit of catalytic activity equal to 10² katals. Symbol: h
Metrology and inspection
150 entries in this trade.
hectometre
An SI unit of length equal to 100 metres. Symbol: hm
hectopascal
An SI unit of pressure equal to 10² pascals. Symbol: hPa
International System of Units
A standard set of units of measurement for use in scientific literature worldwide. The newest and most widespread version of the metric system.
kilocandela
An SI unit of luminous intensity equal to 10³ candelas. Symbol: kcd
kilodegree
One thousand degrees of any kind, though usually not temperature.
kilogray
An SI unit of absorbed energy from ionizing radiation equal to 10³ grays. Symbol: k
kilojoule
An SI unit of energy equal to 10³ joules. Symbol: kJ
kilokatal
An SI unit of catalytic activity equal to 10³ katals. Symbol: k
kilokelvin
An SI unit of temperature equal to 10³ kelvins. Symbol: kK
kilometre
An SI unit of length equal to 10³ metres. Symbol: km
kilomole
An SI unit of amount of substance equal to 10³ moles. Symbol: kmol
kilosecond
An SI unit of time equal to 10³ seconds. Symbol: ks. (= 16.666̄̄ minutes)
London bus
An informal approximate unit of measure used in England.
lunar distance
A unit of length, based on the average distance between the Earth and the Moon.
megacandela
An SI unit of luminous intensity equal to 10⁶ candelas. Symbol: Mcd
megagram
An SI unit of mass equal to 10⁶ grams. Symbol: Mg
megahenry
An SI unit of electrical inductance equal to 10⁶ henrys. Symbol: M
megajoule
An SI unit of energy equal to 10⁶ joules. Symbol: MJ
megaohm
An SI unit of resistance equal to 10⁶ ohms. Symbol: MΩ
megapascal
An SI unit of pressure equal to 10⁶ pascals. Symbol: MPa
megasecond
An SI unit of time equal to 10⁶ seconds. Symbol: Ms. (= 11.5741 days)
microgram
An SI unit of mass equal to 10⁻⁶ grams. Symbol: μg A unit of mass equal to one millionth of a gram, or 0.000 001 grams.
microkatal
An SI unit of catalytic activity equal to 10⁻⁶ katals. Symbol: μ
microkelvin
An SI unit of thermodynamic temperature equal to 10⁻⁶ kelvins. Symbol: μK
micromole
An SI unit of amount of substance equal to 10⁻⁶ moles. Symbol: μmol
microsecond
An SI unit of time equal to 10⁻⁶ seconds. Symbol: μs
microtesla
An SI unit of magnetic flux density equal to 10⁻⁶ teslas. Symbol: μT
milliarcsecond
A unit of angle equal to one thousandth of an arcsecond (used especially in astronomy)
milligram
An SI unit of mass equal to 10⁻³ grams. Symbol: mg
millikatal
An SI unit of catalytic activity equal to 10⁻³ katals. Symbol: m
millisecond
An SI unit of time equal to 10⁻³ seconds. Symbol: ms
ml
Symbol for millilitre, an SI unit of fluid measure equal to 10⁻³ litres.
nano-amp
An SI unit of electrical current equal to 10⁻⁹ amperes. Symbol: nA
nano-farad
An SI unit of electrical capacitance equal to 10⁻⁹ farads. Symbol: nF
nano-joule
An SI unit of energy, work and heat equal to 10⁻⁹ joules. Symbol: nJ
nano-ohm
An SI unit of electrical resistance equal to 10⁻⁹ ohms. Symbol: nΩ
nano-volt
An SI unit of electrical potential equal to 10⁻⁹ volts. Symbol: nV
nanoampere
An SI unit of electrical current equal to 10⁻⁹ amperes. Symbol: nA
nanogram
An SI unit of mass equal to 10⁻⁹ grams. Symbol: ng
nanojoule
An SI unit of work or energy equal to 10⁻⁹ joules. Symbol: nJ
nanokatal
An SI unit of catalytic activity equal to 10⁻⁹ katals. Symbol: n
nanokelvin
An SI unit of thermodynamic temperature equal to 10⁻⁹ kelvins. Symbol: nK
nanomole
An SI unit of amount of substance equal to 10⁻⁹ moles. Symbol: nmol
nanosecond
An SI unit of time equal to 10⁻⁹ seconds. Symbol: ns
nanovolt
An SI unit of electromotive force equal to 10⁻⁹ volts. Symbol: nV
parsec
Syllabic abbreviation of parallax second.
petabecquerel
An SI unit of radioactivity equal to 10¹⁵ becquerels. Symbol: P
petagram
An SI unit of mass equal to 10¹⁵ grams. Symbol: Pg Sometimes used in Carbon Dioxide numbers, it is equivalent to Metric Gigatons (Giga) 10⁹ x (Ton) 10³ x (kg) 10³ = 10¹⁵
petahertz
An SI unit of frequency equal to 10¹⁵ hertz.
petajoule
An SI unit of energy equal to 10¹⁵ joules. Symbol: PJ
petakelvin
An SI unit of temperature equal to 10¹⁵ kelvins. Symbol: PK
petametre
An SI unit of length equal to 10¹⁵ metres. Symbol: Pm
petasecond
An SI unit of time equal to 10¹⁵ seconds. Symbol: Ps. (= 31 709 800 years)
petawatt
An SI unit of power equal to 10¹⁵ watts. Symbol: PW. An amount of power much larger than all the power generated by all power stations on Earth. (Consuming 1 petawatt during a duration of 1 hour would consume 1 petawatt-hour of energy.)
picoampere
An SI unit of current equal to 10⁻¹² amperes. Symbol: pA
picogram
An SI unit of mass equal to 10⁻¹² grams. Symbol: pg
picokatal
An SI unit of catalytic activity equal to 10⁻¹² katals. Symbol: p
picometre
An SI unit of length equal to 10⁻¹² metres. Symbol: pm
piconewton
An SI unit of force equal to 10⁻¹² newtons. Symbol: pN