RTD temperature sensor calculator: calculate temperature according to resistance

RTD temperature sensor conversion tool: R to T

This is used to calculate the temperature value of the RTD temperature sensor from a known resistance.
This calculation tool is used to find the temperature value of RTD temperature sensor with known resistance.

Calculate temperature from resistance

Formula:

Resistance temperature detectors (RTDs) relate resistance to temperature by the following formula:

   RT = Rref[1 + α(T − Tref)]

where,
RT=RTD resistance at given temperature T (ohms)
Rref=RTD resistance at reference temperature Tref (ohms)
α =  Resistance temperature coefficient (ohm/ohm/degree)
example:
The following example shows how to use this formula to calculate the resistance of a PT100 RTD with a temperature coefficient of 0.00392 at a temperature of 35 degrees Celsius:
Assume temperature reference=0 degrees
For PT100 RTD, Rref=100

RT = 100 Ω[1 + (0.00392)(35 − 0)]

RT = 100 Ω[1 + 0.1372]

RT = 100 Ω[1.1372]

RT = 113.72 Ω

For temperature to resistance conversion, the above formula is also applicable.
The above is a basic equation for RTD calculation only.
Notes:
1. The above RTD calculation tools are specially designed for standard PT100 temperature sensors.
2. If you are interested in calculating different RTDs, please change the fixed constant value according to the sensor type.