Ohm's Law
Solve voltage, current, resistance, and power when at least two values are known.
Voltage
120 V
Current
5 A
Resistance
24 ohm
Power
600 W
Formula
I = V / R, P = V^2 / R
Calculator suite
Electrical engineering calculators for controls work.
Inspect fixed Ohm's Law and current examples, then unlock editable inputs plus power, motor, conductor, transformer, voltage-drop, and protection workflows with Toolkit or Pro Toolkit.
Electrical Calculator Index
Core electrical math for controls troubleshooting, panel review, field estimates, and early design checks. Final installation decisions still need manufacturer data, site standards, and applicable code review.
Live recalculation
Ohm's LawCurrentPowerEnergyPower FactorMotor FLAMotor SpeedVoltage DropWire SizeTransformerFuse SizingBreaker Sizing
Current
Estimate line current from real power, voltage, phase, and power factor.
Load current
10.613 A
Apparent power
8.824 kVA
Formula
I = kW * 1000 / (sqrt(3) * VLL * PF)
Advanced electrical calculators locked
Ohm's Law and Current allow two preview inputs while advanced values stay locked. Full flexibility, power, energy, power factor, motor, transformer, voltage drop, wire-size, fuse, and breaker workflows require an active Toolkit or Pro Toolkit entitlement.
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Advanced electrical review tools
Free preview
Change two representative Ohm's Law or current values and watch the real results update.
Paid operation
Every input combination plus power, energy, motor, transformer, voltage-drop, wire-size, protection, and review flows require paid access.
Unlocks with Toolkit or Pro Toolkit
- Every input combination
- Multi-step reviews
- Documentation-ready output
Entitlement store: unavailable. No saved presets, saved settings, or customer tool history are stored in V1.