PT100 / PT1000 RTD Calculator
Calculate platinum RTD resistance or temperature using the IEC 60751 Callendar–Van Dusen equation, with tolerance range.
Typical resistance–
Minimum–
Maximum–
Input reading–
About platinum RTDs
T ≥ 0 °C: R = R₀ × (1 + A·T + B·T²)
T < 0 °C: R = R₀ × (1 + A·T + B·T² + C·(T − 100)·T³)
PT100 (R₀ = 100 Ω) and PT1000 (R₀ = 1000 Ω) are platinum resistance temperature detectors. This uses the IEC 60751 Callendar–Van Dusen coefficients (with a 3920 ppm/°C option). Switch the mode to solve resistance from a temperature, or temperature from a measured resistance; the tolerance gives the resulting min/max band.