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.

PLC

PLC & Controls

PLC Raw Counts → Engineering Units

Convert PLC analog input raw counts into engineering units using configurable input and engineering ranges.

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MOD

PLC & Controls

Modbus Register Converter

Convert Modbus register values into engineering units using configurable scaling and ranges.

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PID

PLC & Controls

PID Output / Bias Calculator

Calculate controller output from error, proportional gain, bias, and PID contributions.

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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.

L

Instrumentation

Level Transmitter Scaling

Convert a 4–20 mA level transmitter signal into engineering units or calculate expected transmitter current from level.

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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.

A

Electrical

Motor HP → Amps

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

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kW

Electrical

kW → Amps

Calculate AC current from kW, voltage, phase, and power factor.

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