Temperature Sensor Resistance to Voltage Calculator

Convert sensor resistance and temperature data into a 0–5 V input calibration table. Enter low/high points and choose an interpolation method, or paste the full resistance table supplied with your sensor. This calculates expected input voltage; it does not create a physical voltage signal.

All Calculators

Temperature units for your inputs

Calibration table method

Low temperature

High temperature

Resistance at low temperature (Ω)

Resistance at high temperature (Ω)

Pull-up supply / reference voltage (V)

Effective pull-up resistance (Ω)

Number of generated rows, including endpoints

Check one resistance (Ω)

Supplied sensor points: temperature, resistance in Ω

Results update as you type.

Calculated calibration table

CSV is a reference table; confirm the required format before importing into ECU software.

The 5 V / 1,000 Ω defaults are inferred from the supplied FuelTech IAT chart, not a confirmed specification for every FuelTech ECU/input. Confirm the effective pull-up and supply for your exact hardware and configuration. The calculation assumes a pull-up to the reference supply with the resistive sensor connected from signal to sensor ground. Resistance alone does not determine voltage without this circuit information. An active 0–5 V sensor uses a different calibration. Do not add another pull-up without accounting for existing pull-ups. Linear interpolation and the two-point beta model are estimates; use the manufacturer’s full table or measured points for calibration accuracy, and verify the resulting voltage/temperature readings before relying on them.

Table methods: Linear resistance joins the two resistance endpoints with a straight line, then converts each point through the voltage divider. Linear voltage joins the endpoint voltages. NTC beta estimates a thermistor curve. Supplied points converts each resistance directly with no curve-fitting. Neither two-point interpolation nor beta fitting recreates a full manufacturer curve exactly.

Formula and assumptions

Signal voltage = supply × sensor resistance ÷ (pull-up resistance + sensor resistance). Example: 5 × 8,026 ÷ (1,000 + 8,026) = 4.44604 V. Pull-up inferred from a known pair = sensor resistance × (supply ÷ measured voltage − 1). For NTC beta: B = ln(Rlow/Rhigh) ÷ (1/Tlow − 1/Thigh), and R(T) = Rlow × exp[B × (1/T − 1/Tlow)], using kelvin.