34 tools shown.
NodeAndVolt Workbench
Search by intent, get calculator suggestions, and review recent calculations from anywhere on the site.
Power Systems and Machines
Single-Phase Power
Calculate kW and kVA.
Power3-Phase Power
Calculate balanced kW and kVA.
Bulk powerBulk Power MVA and Amps
Convert between line MVA and current.
System studiesPer-Unit Base Conversion
Convert impedance between study bases.
Fault analysisShort-Circuit Current
Convert fault MVA to symmetrical current.
Fault analysisFault MVA
Convert symmetrical current to fault level.
Fault analysisTransformer Fault Current
Estimate current from nameplate %Z.
Power flowMW, MVAR, MVA, and PF
Solve the AC power triangle.
ConversionkW to Amps
Convert real power to current.
TransformerTransformer kVA
Calculate apparent power.
TransformerTurns Ratio
Calculate ideal winding values.
Three-phaseLine and Phase Values
Convert wye and delta quantities.
MachinesMotor FLA
Estimate full-load current.
Reactive powerPower Factor Correction
Estimate capacitor kVAR.
GenerationGenerator Sizing
Estimate running capacity.
DistributionVoltage Drop
Estimate conductor voltage loss.
Circuits and Electronics
Ohm's Law
Calculate V, I, R, and P.
ResistorsSeries and Parallel Resistance
Combine resistor values.
ResistorsResistor Divider
Calculate unloaded output.
Component referenceResistor Color Code
Decode 4-band and 5-band values.
LEDLED Resistor
Select resistance and wattage.
TransientRC Time Constant
Calculate charging time.
CapacitorsCapacitor Energy
Calculate stored energy and charge.