Practical engineering calculators
Use focused calculators for everyday electrical, electronics and industrial engineering work, from conductor sizing to circuit timing and attenuation networks.
Electrical design
Quick calculations for conductors, three-phase systems and common AC or DC circuit relationships.
Wire gauge calculator
Estimate conductor size from current, length, voltage and allowable voltage drop.
Open calculatorThree-phase delta–wye calculator
Convert line and phase voltage or current between delta and wye systems.
Open calculatorPower factor calculator
Relate real, reactive and apparent power in AC systems.
Open calculatorVoltage divider calculator
Calculate resistor divider output voltage and component values.
Open calculatorReactance calculator
Calculate capacitive or inductive reactance at a selected frequency.
Open calculatorTiming, filters & safety
Explore time-dependent circuit behavior, basic filter response and capacitor discharge requirements.
Time constant calculator
Calculate RC and RL time constants and response intervals.
Open calculatorLow-pass & high-pass filter calculator
Estimate cutoff frequency and component values for basic filters.
Open calculator555 timer calculator
Estimate timing, frequency and duty cycle for common 555 configurations.
Open calculatorCapacitor safety discharge calculator
Estimate discharge time and bleeder resistor requirements.
Open calculatorComponents & coding
Decode component markings and convert common capacitance or resistance values.
RF attenuation
Calculate common passive attenuator networks from impedance and target attenuation.
Pi attenuator calculator
Calculate resistor values for a matched Pi attenuator network.
Open calculatorTee attenuator calculator
Calculate resistor values for a matched Tee attenuator network.
Open calculatorBridged-Tee attenuator calculator
Calculate the component values for a bridged-Tee attenuator.
Open calculatorUse calculation results as engineering guidance
Verify results against the applicable product documentation, installation requirements, safety factors and local standards before specifying equipment or carrying out electrical work.