Công thức Callendar – Van Dusen:

\({R_T} = {R_0}\left( {1 + AT + B{T^2} - 100C{T^3} + C{T^4}} \right)\)

\({R_T} = {R_0}\left( {1 + AT + B{T^2} + 100C{T^3} + C{T^4}} \right)\)

\({R_T} = {R_0}\left( {1 + AT + B{T^2} - C{T^3} + C{T^4}} \right)\)

\({R_T} = {R_0}\left( {1 + AT + B{T^2} - C{T^3} + 100C{T^4}} \right)\)