Controls & Instrumentation Calculators

mA

Instrumentation

4–20 mA Scaling

Convert a measured 4–20 mA signal into engineering units.

V

Instrumentation

4–20 mA to Voltage

Calculate the voltage produced across a loop resistor.

FP

PLC & Data

IEEE-754 Floating Point

Convert floating-point values between decimal, binary, hexadecimal, and 16-bit PLC or Modbus registers.

Ω

Instrumentation

4–20 mA Loop Resistor

Find the resistor needed to produce a target voltage.

V

Controls

0–10 V Scaling

Convert a 0–10 V signal into engineering units.

A

Controls

Analog Signal Scaling

Perform generic linear scaling for PLC and control signals.

Ω

Electrical

Ohm’s Law

Calculate voltage, current, resistance, or power.

V

Electrical

Voltage Divider

Calculate the output voltage of a resistor divider.

RTD

Instrumentation

RTD & Temperature Sensor

Calculate resistance or temperature for common sensors

P

Instrumentation

Pressure Transmitter Scaling

Convert a 4–20 mA pressure signal into engineering units.

P

Instrumentation

Flow Transmitter Scaling

Calculate flow from a 4–20 mA flow transmitter, including square-root extraction for differential-pressure flow measurement.

A

ELECTRICAL

3-Phase Motor Current

Estimate motor current from horsepower or kW, voltage, power factor, and efficiency.

PF

ELECTRICAL

Power Factor

Calculate power factor, real power, apparent power, reactive power, and current for single-phase and three-phase systems.

RPM

Electrical

Frequency ↔ RPM

Convert AC frequency to synchronous motor speed or calculate frequency from RPM.