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# Unit Definitions

Browse our growing collection of unit definitions:

#### Abohm (abĪ©)

The abohm is the derived unit of electrical resistance in the emu-cgs (centimeter-gram-second) system of units where emu stands for electromagnetic units.

#### Abvolt (abV)

The abvolt (abV) is the unit of potential difference in the CGS-EMU system of units. It corresponds to 10^{ā8} volts (V) in the SI system and 1/c_{cgs} statvolt (staā¦

#### Ampere-Turn (AT)

The ampere-turn is a unit of magnetomotive force that represents a direct current of one ampere (A) flowing in a single turn loop in a vacuum.

#### Ampere (A)

The ampere (A), often shortened to the amp, is a unit of electric current in the International System of Units (SI).

#### Attoampere-Turn (aAT)

The attoampere-turn is a multiple of the unit ampere-turn (AT) for magnetomotive force. The International System of Units (SI) defines the prefix atto (a) as aā¦

#### Attoampere (aA)

The attoampere is a multiple of the unit ampere (A) for electric current. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-ā¦}

#### Attobar (abar)

The attobar is a multiple of the unit bar (bar) for pressure. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.0000ā¦

#### Attobels (aB)

The attobel is a multiple of the unit bels (B) for sound level. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.00ā¦

#### Attocandela (acd)

The attocandela is a multiple of the unit candela (cd) for luminous intensity. The International System of Units (SI) defines the prefix atto (a) as a factor oā¦

#### Attocoulomb (aC)

The attocoulomb is a multiple of the unit coulomb (C) for electric charge. The International System of Units (SI) defines the prefix atto (a) as a factor of 10ā¦

#### Attofarad (aF)

The attofarad is a multiple of the unit farad (F) for capacitance. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0ā¦

#### Attogram (ag)

The attogram is a multiple of the unit gram (g) for mass & weight. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0ā¦

#### Attohenry (aH)

The attohenry is a multiple of the unit henry (H) for inductance. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.ā¦

#### Attohertz (aHz)

The attohertz is a multiple of the unit hertz (Hz) for frequency. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.ā¦

#### Attojoules (aJ)

The attojoule is a multiple of the unit joule (J) for energy. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.0000ā¦

#### Attoliter (aL)

The attoliter is a multiple of the unit liter (L) for volume. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.0000ā¦

#### Attometer (am)

The attometer is a multiple of the unit meter (m) for length & distance. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-1ā¦}

#### Attomho (aā§)

The attomho is a multiple of the unit mho (ā§) for electrical conductance. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-ā¦}

#### Attomolar (aM)

The attomolar is a multiple of the unit molar (M) for substance concentration. The International System of Units (SI) defines the prefix atto (a) as a factor oā¦

#### Attomole (amol)

The attomole is a multiple of the unit mole (mol) for amount of substance. The International System of Units (SI) defines the prefix atto (a) as a factor of 10ā¦

#### Attonepers (aNp)

The attoneper is a multiple of the unit neper (Np) for sound level. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or ā¦

#### Attonewton (aN)

The attonewton is a multiple of the unit newton (N) for force. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.000ā¦

#### Attoohm (aĪ©)

The attoohm is a multiple of the unit ohm (Ī©) for electrical resistance. The international System of Units (SI) defines the prefix atto (a) as a factor of 10^{-1ā¦}

#### Attoparker (aparker)

The attoparker is a multiple of the unit parker (parker) for radiation exposure. The International System of Units (SI) defines the prefix atto (a) as a factorā¦

#### Attopascal (aPa)

The attopascal is a multiple of the unit pascal (Pa) for pressure. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0ā¦

#### Attorep (arep)

The attorep is a multiple of the unit rep (rep) for radiation exposure. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18ā¦}

#### Attoroentgen (aR)

The attoroentgen is a multiple of the unit roentgen (R) for radiation exposure. The International System of Units (SI) defines the prefix atto (a) as a factor ā¦

#### Attoseconds (as)

The attosecond is a multiple of the unit second (s) for time. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.0000ā¦

#### Attosiemens (aS)

The attosiemens is a multiple of the unit siemens (S) for electric conductance. The International System of Units (SI) defines the prefix atto (a) as a factor ā¦

#### Attotorr (aTorr)

The attotorr is a multiple of the unit torr (Torr) for pressure. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.0ā¦

#### Atto (a)

Atto is a SI unit prefix in the metric system denoting a factor of 10^{-18} or 0.000000000000000001. It is represented by the prefix atto or the symbol a.

#### Attovolt (aV)

The attovolt is a multiple of the unit volt (V) for voltage. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.00000ā¦

#### Attowatt (aW)

The attowatt is a multiple of the unit watt (W) for power. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} or 0.0000000ā¦

#### Attoweber (aWb)

The attoweber is a multiple of the unit weber (Wb) for magnetic flux. The International System of Units (SI) defines the prefix atto (a) as a factor of 10^{-18} oā¦

#### Bar (bar)

The bar is a metric unit of pressure, but is not part of the International System of Units (SI). The bar is defined as 100,000 pascal (Pa) or 100 kilopascal (kā¦

#### Bels (B)

The bel (B) is a unit used to measure a given sound level. The term is derived from the name of Alexander Graham Bell the inventor of the telephone.

#### Bits (b)

A binary digit, with the value 0 or 1 which is used to store or represent data.

#### Bytes (B)

The byte is a unit of digital information that most commonly consists of eight bits (b).

#### Candela (cd)

The candela is the unit of luminous intensity in the International System of Units (SI). It measures luminous power per unit solid angle emitted by a light souā¦

#### Centiampere-Turn (cAT)

The centiampere-turn is a multiple of the unit ampere-turn (AT) for magnetomotive force. The International System of Units (SI) defines the prefix centi (c) asā¦

#### Centiampere (cA)

The centiampere is a multiple of the unit ampere (A) for electric current. The International System of Units (SI) defines the prefix centi (c) as a factor of oā¦

#### Centibar (cbar)

The centibar is a multiple of the unit bar (bar) for pressure. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredthā¦

#### Centibels (cB)

The centibel is a multiple of the unit bel (B) for sound level. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredtā¦

#### Centicandela (ccd)

The centicandela is a multiple of the unit candela (cd) for luminous intensity. The International System of Units (SI) defines the prefix centi (c) as a factorā¦

#### Centicoulomb (cC)

The centicoulomb is a multiple of the unit coulomb (C) for electric charge. The International System of Units (SI) defines the prefix centi (c) as a factor of ā¦

#### Centifarad (cF)

The centifarad is a multiple of the unit farad (F) for capacitance. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundā¦

#### Centigram (cg)

The centigram is a multiple of the unit gram (g) for mass & weight. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundā¦

#### Centihenry (cH)

The centihenry is a multiple of the unit henry (H) for inductance. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundrā¦

#### Centihertz (cHz)

The centihertz is a multiple of the unit hertz (Hz) for frequency. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundrā¦

#### Centijoules (cJ)

The centijoule is a multiple of the unit joule (J) for energy. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredthā¦

#### Centiliter (cL)

The centiliter is a multiple of the unit liter (L) for volume. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredthā¦

#### Centimeter (cm)

The centimeter is a multiple of the unit meter (m) for length & distance. The International System of Units (SI) defines the prefix centi (c) as a factor of onā¦

#### Centimho (cā§)

The centimho is a multiple of the unit mho (ā§) for electrical conductance. The International System of Units (SI) defines the prefix centi (c) as a factor of oā¦

#### Centimolar (cM)

The centimolar is a multiple of the unit molar (M) for substance concentration. The International System of Units (SI) defines the prefix centi (c) as a factorā¦

#### Centimole (cmol)

The centimole is a multiple of the unit mole (mol) for amount of substance. The International System of Units (SI) defines the prefix centi (c) as a factor of ā¦

#### Centinepers (cNp)

The centineper is a multiple of the unit neper (Np) for sound level. The International System of Units (SI) defines the prefix centi (c) as a factor of one hunā¦

#### Centinewton (cN)

The centinewton is a multiple of the unit newton (N) for force. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredtā¦

#### Centiohm (cĪ©)

The centiohm is a multiple of the unit ohm (Ī©) for electrical resistance. The international System of Units (SI) defines the prefix centi (c) as a factor of onā¦

#### Centiparker (cparker)

The centiparker is a multiple of the unit parker (parker) for radiation exposure. The International System of Units (SI) defines the prefix centi (c) as a factā¦

#### Centipascal (cPa)

The centipascal is a multiple of the unit pascal (Pa) for pressure. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundā¦

#### Centirep (crep)

The centirep is a multiple of the unit rep (rep) for radiation exposure. The International System of Units (SI) defines the prefix centi (c) as a factor of oneā¦

#### Centiroentgen (cR)

The centiroentgen is a multiple of the unit roentgen (R) for radiation exposure. The International System of Units (SI) defines the prefix centi (c) as a factoā¦

#### Centiseconds (cs)

The centisecond is a multiple of the unit second (s) for time. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredthā¦

#### Centisiemens (cS)

The centisiemens is a multiple of the unit siemens (S) for electric conductance. The International System of Units (SI) defines the prefix centi (c) as a factoā¦

#### Centitorr (cTorr)

The centitorr is a multiple of the unit torr (Torr) for pressure. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundreā¦

#### Centi (c)

Centi is a SI unit prefix in the metric system denoting a factor of one hundredth. Proposed in 1793 and adopted in 1795, the prefix comes from the Latin term cā¦

#### Centivolt (cV)

The centivolt is a multiple of the unit volt (V) for voltage. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredth ā¦

#### Centiwatt (cW)

The centiwatt is a multiple of the unit watt (W) for power. The International System of Units (SI) defines the prefix centi (c) as a factor of one hundredth orā¦

#### Centiweber (cWb)

The centiweber is a multiple of the unit weber (Wb) for magnetic flux. The International System of Units (SI) defines the prefix centi (c) as a factor of one hā¦

#### Coulomb (C)

The coulomb (C) is a unit of electric charge in the International System of Units (SI). In the present version of the SI it is equal to the electric charge delā¦

#### Decaampere-Turn (daAT)

The decaampere-turn otherwise referred to as the dekaampere-turn (daAT) is a multiple of the unit ampere-turn (AT) for magnetomotive force. The International Sā¦

#### Decaampere (daA)

The decaampere otherwise referred to as the dekaampere (daA) is a multiple of the unit ampere (A) for electric current. The International System of Units (SI) ā¦

#### Decabar (dabar)

The decabar otherwise referred to as the dekabar (dabar) is a multiple of the unit bar (bar) for pressure. The International System of Units (SI) defines the pā¦

#### Decabels (daB)

The decabel otherwise referred to as the dekabel (daB) is a multiple of the unit bel (B) for sound level. The International System of Units (SI) defines the prā¦

#### Decabits (dab)

The decabit otherwise referred to as the dekabit (dab) is a multiple of the unit bit (b) for data storage. The International System of Units (SI) defines the pā¦

#### Decabytes (daB)

The decabyte otherwise referred to as the dekabyte (daB) is a multiple of the unit byte (B) for data storage. The International System of Units (SI) defines thā¦

#### Decacandela (dacd)

The decacandela otherwise referred to as the dekacandela (dacd) is a multiple of the unit candela (cd) for luminous intensity. The International System of Unitā¦

#### Decacoulomb (daC)

The decacoulomb otherwise referred to as the dekacoulomb (daC) is a multiple of the unit coulomb (C) for electric charge. The International System of Units (SIā¦

#### Decafarad (daF)

The decafarad otherwise referred to as the dekafarad (daF) is a multiple of the unit farad (F) for capacitance. The International System of Units (SI) defines ā¦

#### Decagram (dag)

The decagram otherwise referred to as the dekagram (dag) is a multiple of the unit gram (g) for mass & weight. The International System of Units (SI) defines tā¦

#### Decahenry (daH)

The decahenry is a multiple of the unit henry (H) for inductance. The International System of Units (SI) defines the prefix deca (da) as a factor of ten.

#### Decahertz (daHz)

The decahertz is a multiple of the unit hertz (Hz) for frequency. The International System of Units (SI) defines the prefix deca (da) as a factor of ten.

#### Decajoules (daJ)

The decajoule otherwise referred to as the dekajoule (daJ) is a multiple of the unit joule (J) for energy. The International System of Units (SI) defines the pā¦

#### Decaliter (daL)

The decaliter otherwise referred to as the dekaliter (daL) is a multiple of the unit liter (L) for volume. The International System of Units (SI) defines the pā¦

#### Decameter (dam)

The decameter otherwise referred to as the dekameter (dam) is a multiple of the unit meter (m) for length & distance. The International System of Units (SI) deā¦

#### Decamho (daā§)

The decamho is a multiple of the unit mho (ā§) for electrical conductance. The International System of Units (SI) defines the prefix deca (da) as a factor of teā¦

#### Decamolar (daM)

The decamolar otherwise referred to as the dekamolar (daM) is a multiple of the unit molar (M) for substance concentration. The International System of Units (ā¦

#### Decamole (damol)

The decamol otherwise referred to as the dekamole (damol) is a multiple of the unit mole (mol) for amount of substance. The International System of Units (SI) ā¦

#### Decanepers (daNp)

The decaneper otherwise referred to as the dekaneper (daNp) is a multiple of the unit neper (Np) for sound level. The International System of Units (SI) defineā¦

#### Decanewton (daN)

The decanewton is a multiple of the unit newton (N) for force. The International System of Units (SI) defines the prefix deca (da) as a factor of ten.

#### Decaohm (daĪ©)

The decaohm is a multiple of the unit ohm (Ī©) for electrical resistance. The international System of Units (SI) defines the prefix deca (da) as a factor of ten.

#### Decaparker (daparker)

The decaparker otherwise referred to as the dekaparker (daparker) is a multiple of the unit parker (parker) for radiation exposures. The International System oā¦

#### Decapascal (daPa)

The decapascal otherwise referred to as the dekapascal (daPa) is a multiple of the unit pascal (Pa) for pressure. The International System of Units (SI) defineā¦

#### Decarep (darep)

The decarep otherwise referred to as the dekarep (darep) is a multiple of the unit rep (rep) for radiation exposure. The International System of Units (SI) defā¦

#### Decaroentgen (daR)

The decaroentgen otherwise referred to as the dekaroentgen (daR) is a multiple of the unit roentgen (R) for radiation exposure. The International System of Uniā¦

#### Decaseconds (das)

The decasecond otherwise referred to as the dekasecond (das) is a multiple of the unit second (s) for time. The International System of Units (SI) defines the ā¦

#### Decasiemens (daS)

The decasiemens is a multiple of the unit siemens (S) for electric conductance. The International System of Units (SI) defines the prefix deca (da) as a factorā¦

#### Decatorr (daTorr)

The decatorr otherwise referred to as the dekatorr (daTorr) is a multiple of the unit torr (Torr) for pressure. The International System of Units (SI) defines ā¦

#### Deca (da)

The prefix deca otherwise referred to as deka (da) is a decimal SI unit prefix in the metric system denoting a factor of ten.

#### Decavolt (daV)

The decavolt otherwise referred to as the dekavolt (daV) is a multiple of the unit volt (V) for voltage. The International System of Units (SI) defines the preā¦

#### Decawatt (daW)

The decawatt otherwise referred to as the dekawatt (daW) is a multiple of the unit watt (W) for power. The International System of Units (SI) defines the prefiā¦

#### Decaweber (daWb)

The decaweber otherwise referred to as the dekaweber (daWb) is a multiple of the unit weber (Wb) for magnetic flux. The International System of Units (SI) defiā¦

#### Deciampere-Turn (dAT)

The deciampere-turn is a multiple of the unit ampere-turn (AT) for magnetomotive force. The International System of Units (SI) defines the prefix deci (d) as aā¦

#### Deciampere (dA)

The deciampere is a multiple of the unit ampere (A) for electric current. The International System of Units (SI) defines the prefix deci (d) as a factor of oneā¦

#### Decibar (dbar)

The decibar is a multiple of the unit bar (bar) for pressure. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0.ā¦

#### Decibels (dB)

The decibel is a multiple of the unit bel (B) for sound level. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0ā¦

#### Decicandela (dcd)

The decicandela is a multiple of the unit candela (cd) for luminous intensity. The International System of Units (SI) defines the prefix deci (d) as a factor oā¦

#### Decicoulomb (dC)

The decicoulomb is a multiple of the unit coulomb (C) for electric charge. The International System of Units (SI) defines the prefix deci (d) as a factor of onā¦

#### Decifarad (dF)

The decifarad is a multiple of the unit farad (F) for capacitance. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth ā¦

#### Decigram (dg)

The decigram is a multiple of the unit gram (g) for mass & weight. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth ā¦

#### Decihenry (dH)

The decihenry is a multiple of the unit henry (H) for inductance. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth oā¦

#### Decihertz (dHz)

The decihertz is a multiple of the unit hertz (Hz) for frequency. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth oā¦

#### Decijoules (dJ)

The decijoule is a multiple of the unit joule (J) for energy. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0.ā¦

#### Deciliter (dL)

The deciliter is a multiple of the unit liter (L) for volume. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0.ā¦

#### Decimeter (dm)

The decimeter is a multiple of the unit meter (m) for length & distance. The International System of Units (SI) defines the prefix deci (d) as a factor of one ā¦

#### Decimho (dā§)

The decimho is a multiple of the unit mho (ā§) for electrical conductance. The International System of Units (SI) defines the prefix deci (d) as a factor of oneā¦

#### Decimolar (dM)

The decimolar is a multiple of the unit molar (M) for substance concentration. The International System of Units (SI) defines the prefix deci (d) as a factor oā¦

#### Decimole (dmol)

The decimole is a multiple of the unit mole (mol) for amount of substance. The International System of Units (SI) defines the prefix deci (d) as a factor of onā¦

#### Decinepers (dNp)

The decineper is a multiple of the unit neper (Np) for sound level. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenthā¦

#### Decinewton (dN)

The decinewton is a multiple of the unit newton (N) for force. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0ā¦

#### Deciohm (dĪ©)

The deciohm is a multiple of the unit ohm (Ī©) for electrical resistance. The international System of Units (SI) defines the prefix deci (d) as a factor of one ā¦

#### Deciparker (dparker)

The deciparker is a multiple of the unit parker (parker) for radiation exposure. The International System of Units (SI) defines the prefix deci (d) as a factorā¦

#### Decipascal (dPa)

The decipascal is a multiple of the unit pascal (Pa) for pressure. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth ā¦

#### Decirep (drep)

The decirep is a multiple of the unit rep (rep) for radiation exposure. The International System of Units (SI) defines the prefix deci (d) as a factor of one tā¦

#### Deciroentgen (dR)

The deciroentgen is a multiple of the unit roentgen (R) for radiation exposure. The International System of Units (SI) defines the prefix deci (d) as a factor ā¦

#### Deciseconds (ds)

The decisecond is a multiple of the unit second (s) for time. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0.ā¦

#### Decisiemens (dS)

The decisiemens is a multiple of the unit siemens (S) for electric conductance. The International System of Units (SI) defines the prefix deci (d) as a factor ā¦

#### Decitorr (dTorr)

The decitorr is a multiple of the unit torr (Torr) for pressure. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth orā¦

#### Deci (d)

Deci is a decimal SI unit prefix in the metric system denoting a factor of one tenth. Proposed in 1793 and adopted in 1795, the prefix comes from the Latin terā¦

#### Decivolt (dV)

The decivolt is a multiple of the unit volt (V) for voltage. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0.1.

#### Deciwatt (dW)

The deciwatt is a multiple of the unit watt (W) for power. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenth or 0.1.

#### Deciweber (dWb)

The deciweber is a multiple of the unit weber (Wb) for magnetic flux. The International System of Units (SI) defines the prefix deci (d) as a factor of one tenā¦