**The calculator uses the following equation and coefficients.**(Callendar-Van Dusen Equation)

**\[ R = R_0 \left[1 + A t + B t^2 + C (t - 100) t^3\right] \]**

Temperature Range | R_{0} |
A | B | C |
---|---|---|---|---|

-40 °C to 0 °C | 100.00 | 3.9827E-3 | -5.875E-7 | -4.171E-12 |

0 °C to 540 °C | 100.00 | 3.9827E-3 | -5.875E-7 | 0 |

Temperature Range | R_{0} |
A | B | C |
---|---|---|---|---|

-200 °C to 0 °C | 100.00 | 3.9083E-3 | -5.775E-7 | -4.183E-12 |

0 °C to 540 °C | 100.00 | 3.9083E-3 | -5.775E-7 | 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**.