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Industrial Electrical & Automation Calculators

A comprehensive collection of engineering calculators covering electrical design, RF systems, power electronics, industrial automation and component selection.
This tool is based on Parttogo’s open-source industrial automation calculator project.

Electrical & Power Calculators

Select wire size based on current, length and voltage drop.

Ohm's Law Calculator

Ohm's Law Calculator

Calculate voltage, current, resistance and power instantly.

Voltage Divider Calculator

Voltage Divider Calculator

Determine output voltage for resistor divider networks.

Current Divider Calculator

Current Divider Calculator

Calculate current distribution in parallel branches.

Battery Life Calculator

Battery Life Calculator

Estimate battery runtime from load current and capacity.

Wire Gauge Calculator

Wire Gauge Calculator

Calculate proper wire size for industrial power distribution and motor wiring applications.

Passive Component Calculators

Tools for selecting, decoding and combining resistors, capacitors and passive networks.

Capacitance Conversion

Capacitance Conversion

Convert between pF, nF and µF units.

Parallel and Series Resistor Calculator

Parallel and Series Resistor Calculator

Calculate equivalent resistance for resistor networks.

SMD Capacitor Code Calculator

SMD Capacitor Code Calculator

Decode SMD capacitor markings into capacitance.

SMD Resistor Code Calculator

SMD Resistor Code Calculator

Decode SMD resistor markings into ohms.

Resistor Color Code Calculator

Resistor Color Code Calculator

Decode resistor color bands into resistance values.

Timing, Transient & Safety Calculators

Analyze time constants, transient behavior and safe discharge of energy storage components.

Capacitor Safety Discharge Calculator

Capacitor Safety Discharge Calculator

Estimate safe discharge time and resistor values.

555 Timer Calculator

555 Timer Calculator

Design astable and monostable 555 timer circuits.

Time Constant Calculator

Time Constant Calculator

Calculate RC and RL time constants and response curves.

RF & Signal Attenuation Calculators

Design impedance-matched attenuators and analyze signal loss in RF systems.

Reflection Attenuator Calculator

Reflection Attenuator Calculator

Analyze attenuation using controlled mismatch.

Bridged-Tee Attenuator Calculator

Bridged-Tee Attenuator Calculator

Design constant-impedance bridged-T attenuators.

Tee Attenuator Calculator

Tee Attenuator Calculator

Calculate resistor values for T attenuator networks.

dBm to Watts Conversion

dBm to Watts Conversion

Convert RF power between dBm and watts.

Pi Attenuator Calculator

Pi Attenuator Calculator

Design fixed π attenuators for matched systems.

Filters & Frequency Calculators

Analyze frequency response, reactance and filter behavior in AC circuits.

Low Pass/High Pass Filter Calculator

Low Pass/High Pass Filter Calculator

Design simple RC filters and cutoff frequency.

Reactance Calculator

Reactance Calculator

Calculate capacitive and inductive reactance vs frequency.

Conversion & Reference Calculators

Quick engineering unit conversions and reference tools for daily use.

Temperature Conversion

Temperature Conversion

Convert between °C, °F, K and °R instantly.