Also, see our PT100 Table Generator.

Use this PT100 Calculator to calculate temperature and resistance values from the standard PT100 curves. The calculator will produce a temperature value from an entered resistance or calculate resistance and thermometer sensitivity values from an entered temperature.

Select the required temperature units, thermometer type, and nominal resistance at 0 °C (R_{0}) value.

You can enter a custom R_{0} value but understand that calculated values will be unique for the thermometer and will not be of standard table value.

**To calculate temperature:** enter a resistance value and click calculate.

**To calculate resistance:** enter a temperature value and click calculate.

Resistance results are given in ohms. Thermometer sensitivity (dR/dT) is given in ohms-per-degree (for example Ω/°C).

The calculator uses the following equation and coefficients.

R = R_{0} [1 + A t + B t^{2} + C (t – 100) t^{3}]

-40 °C to 0 °C | |

R_{0} | 100.0000 |

A | 3.9827E-3 |

B | -5.875E-7 |

C | -4.171E-12 |

0 °C to 540 °C | |

R_{0} | 100.0000 |

A | 3.9827E-3 |

B | -5.875E-7 |

C | 0 |

-200 °C to 0 °C | |

R_{0} | 100.0000 |

A | 3.9083E-3 |

B | -5.775E-7 |

C | -4.183E-12 |

0 °C to 540 °C | |

R_{0} | 100.0000 |

A | 3.9083E-3 |

B | -5.775E-7 |

C | 0 |

R_{0} = Nominal thermometer resistance at 0 °C

A, B, C = equation coefficients obtained from the standards listed below.

Calculated values and the PT-100 equation are from the following standards: IEC 60751:2008, ASTM E1137-08(2020), and JIS C 1604:1997.

Let Fluke show you how to calibrate your PT100s, RTDs, thermocouples, and temperature transmitters in-house confidently and with these benefits:

**1. Improve quality.** Know how your important instrumentation is doing and control your processes more efficiently.

**2. Reduce turn times and risk of equipment damage.** No more shipping probes out of house for service.

**3. Save money.** Save on re-calibration costs.

**4. Automate calibration.** Track equipment efficiently with software.

**For more information,** read the article, How to calibrate PT100s in house

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