# Calculating Resistance or Temperature from ITS-90 coefficients

<click on the Excel document below>

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• Nguyễn Việt Phương

Temperature range from 660.323 to 961.78 need d coefficient but I didn't see it in your excel file?

• Elmar Baumhögger

Thank you very much for the Excel document! It helped me a lot.
But I found an error:
Constant aa5 value -0.61893395 (H30) is wrong. It must be -0.61899395.

• Shane Alldredge

• Rich Gajdowski

Hello Shane! Thanks so much for taking the time to put this together. What a timesaver this turned out to be.

• Tom Hugana

Hi Shane,
could you please add a comment to the R=>T conversion including cell B22. Is there any reference to this?

• Alex Arellano

Hi Shane,
is there a formula could i used to compute ( a4 b4 a7 b7 c7 results of Nominal current Calibration ) I cant find any formula for this equation . i find it in may sensor calibration certificate. hope you can give me idea how can i compute.

thanks,
AlexA

• Ciro Alberto Sanchez

Great work. ¡¡¡Congrats!!!

Could you check out about the titles:
i. Above Zero Calculator 0.01 °C to 660.323 °C
ii. Below Zero Calculator -189.3442 °C to 0.01 °C
iii. K and not °K

• Ciro Alberto Sanchez

To Alex Arellano:

You can found useful:

• Larry Armfield

a(x)= -1.62474200E-02
b(x)= 0.00000000E+00
c7= 0.00000000E+00
a(x)= -1.61388300E-02
b(x)= -1.26969300E-04