Acceptable units

Updated 29 Aug 2024

See below for format rules when you need to enter a unit for numeric value with unit answers.

You do NOT lose an answer attempt if you submit an answer with an unrecognized unit. You may receive feedback about how to enter the unit format correctly.

  • Use only unit abbreviations. Do NOT add a period after any unit.
  • Units are case-sensitive.
  • Mastering can accept as correct a unit answer that is equivalent to the correct answer. For example, if the correct answer is 2 V and you enter 2000 mV, you will receive full credit. See next point for an exception to this rule.
  • Both SI (International System of Units) and U.S. Customary units are represented on the list of units that Mastering recognizes, so you can gain credit by answering correctly using either an SI unit or a US Customary unit.

    Exception: When a question asks you to answer using a specific unit system, you must answer in that unit system. If you answer using the incorrect unit system, you will lose an answer attempt and any associated credit, even if your answer would otherwise be considered equivalent.

  • For multiplication in compound units, you can enter either * (centered dot) or - (dash). For example, ft dot lb and ft-lb are accepted as equivalent correct units.

Select a category to view units and how to enter them

To view ALL units for all categories on this page — Select "" Expand all in the Help toolbar above.

kat
s to the power of minus 1 or 1 over s Enter s^-1or 1/s
M  
m
mol over L Enter mol/L
mol over expression L times atm Enter mol/L*atm
ppb  
ppm  
degree symbol Enter \deg
angstrom symbol Enter \AA
au
ft  
ft squared Enter ft^2
ft cubed Enter ft^3
ha  
in  
in squared Enter in^2
in cubed Enter in^3
L  
ly  
m  
m squared Enter m^2
m cubed Enter m^3
mi  
pc  
rad  
rev  
sr  
ua  
yd  
A  
amp (Mastering Chemistry)
A over expression m squared Enter A/m^2
A over V Enter A/V
C  
C over m Enter C/m
C over expression m squared Enter C/m^2
C over expression m cubed Enter C/m^3
C over s Enter C/s
C over V Enter C/V
D  
e  
esu  
F  
J over C Enter J/C
(m squared times K) over W

Choose fraction (not /), and then enter m^2chem_ee_d_arrow*Kdown arrow keyW
N over C Enter N/C
(N times m squared) over C Choose fraction (not /), and then enter N*m^2down arrow keychem_ee_d_arrowC
Omega symbol Enter \Omega
Omega symbol times m Enter \Omega*m
S  
V  
V over A Enter V/A
V times m Enter V*m
V over m Enter V/m
W over A Enter W/A
erg  
eV
ft times lb Enter ft*lb
J  
J over L Enter J/L
J over expression m squared times s Enter J/m^2down arrow key*s
J over expression m cubed Enter J/m^3
J over mol Enter J/mol
kg over expression m times s squared Enter kg/m*s^2
kg over expression s cubed Enter kg/s^3
kWh  
kWh over mol Enter kWh/mol
N times m Enter N*m
W over expression m squared Enter W/m^2
atm  
bar
dyn  
J over expression m squared Enter J/m^2
expression kg times m squared over expression s squared
Choose fraction (not /), and then enter kg*m^2down arrow keydown arrow keys^2
kg over expression m times s Enter kg/m*s
kg over expression s squared Enter kg/s^2
kip or kips  
ksi  
lb  
lb over ft Enter lb/ft
lb over in Enter lb/in
lb over expression in squared Enter lb/in^2
mmHg  
mol over expression L times atm Enter mol/L*atm
N  
expression N times m over rad Choose fraction (not /), and then enter N*mdown arrow key rad
N times m Enter N*m
N over m Enter N/m
N over m squared Enter N/m^2
expression N times s over m squared Choose fraction (not /), and then enter N*sdown arrow keym^2
Pa  
Pa times s Enter Pa*s
psi  
t  
Torr or torr  
cm to the minus 1or   1 over cm                 Enter cm^-1 or 1/cm
m to the minus 1or 1 over m
Enter m^-1 or 1/m
dpt  
rad over m Enter rad/m

Any angular distance per time measure or per time-squared measure

Any distance per time measure or per time-squared measure

c (the speed of light)
g (the acceleration due to gravity)
expression kg times m over s Choose fraction (not /), and then enter kg*mdown arrow keys
expression kg times m squared over s Choose fraction (not /), and then enter kg*m^2down arrow keydown arrow keys
lb times s Enter lb*s
mph  
N times s Enter N*s
rpm  
expression slug times ft squared over s Choose fraction (not /), and then enter slug*ft^2down arrow keydown arrow keys
A times m squared Enter A*m^2
H
T  
V times s Enter V*s
Wb Note: An answer of V*s is accepted for Wb, but T*m^2 is not.
Wb over A Enter Wb/A
Wb over m squared Enter Wb/m^2
amu  
cm cubed over mole Enter cm^3down arrow key/mol
Da  
g  
g over expression cm cubed Enter g/cm^3
g over mL Enter g/mL
g over mol Enter g/mol
kg  
kg over L Enter kg/L
kg over m Enter kg/m
kg over m squared Enter kg/m^2
kg over m cubed Enter kg/m^3
M subscript Sun Enter M_Sun
meV over expression c squared Enter MeV/c^2
mol (mol, mole, and moles are all accepted as equivalent units)
mole or moles (mole, moles, and mol are all accepted as equivalent units)
slug  
u  
%  
ppb
ppm  
cd  
cd times sr Enter cd*sr
dB  
hp  
J over h Enter J/h
J over min Enter J/min
J over s Enter J/s
kg over expression s cubed Enter kg/s^3
kVA  
kVAR  
L subscript Sun Enter L_Sun
lum  
lx  
MVA  
MVAR  
VA  
VAR  
W  
W over expression m squared Enter W/ m^2
Bq  
Ci  
cM  
dis
Gy  
J over kg Enter J/kg
R  
rad  
rem  
Sv  
Hz  
L over expression mol times s Enter L/mol*s
L squared over expression mol squared times s Enter L^2down arrow key/mol^2*s
L over s Enter L/s
m cubed over s Enter m^3down arrow key/s
(m times s) to the minus 1or 1 over expression M times s Enter (M*s)^-1 or 1/M*s
(M squared times s) to the minus 1or 1 over expression M squared times s Enter (M^2down arrow key*s)^-1 or 1/M^2down arrow key*s
M over h Enter M/h
M over min Enter M/min
M over s Enter M/s
mol over h Enter mol/h
mol over expression L times h Enter mol/L*h
mol over expression L times min Enter mol/L*min
mol over min Enter mol/min
mol over s Enter mol/s
Pa over h Enter Pa/h
Pa over min Enter Pa/min
Pa over s Enter Pa/s
s to the power of minus 1 or 1 over s Enter s^-1 or 1/s
Torr over h or torr over h Enter torr/h
Torr over min or torr over min Enter torr/min
Torr over s or torr over s Enter torr/s
BTU  
degree symbol C Enter \degC
cal  
Cal  
cal over expression g times degree symbol C Enter cal/g*\degC
degree symbol C over m Enter \degC/m
degree symbol F Enter \degF
    J  
J over expression kg times degree symbol C Enter J/kg*\degC
J over expression kg times degree symbol K Enter J/kg*K
J over expression mol times degree symbol C Enter J/kg*\degC
J over expression mol times degree symbol K Enter J/mol*K
J over K Enter J/K
J over kg Enter J/kg
J over mol Enter J/mol
K  
kcal  
m squared over expression s squared times degree symbol C Enter m^2down arrow key/s^2down arrow key*\degC
m squared over expression s squared times K Enter m^2down arrow key/s^2down arrow key*K
degree symbol R  
d  
h
min  
s  
yr  
ft to the power of 4 Enter ft^4
in to the power of 4 Enter in^4
kg times m squared Enter kg*m^2
expression kg times m squared over expression s squared Choose fraction (not /), and then enter kg*m^2down arrow keydown arrow keys^2
kip times foot or kips times feet Enter  kip*ft or kips*ft
kip times in or kips times in Enter  kip*in or kips*in
lb times ft Enter  lb*ft
lb times in Enter lb*in
m to the power of 4 Enter m^4
N times m Enter N*m
slug times expression ft squared Enter slug*ft^2