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ElectriCalc
Free electrical engineering calculators — Ohm's Law, wire sizing, resistor color codes, voltage drop, LED resistors, and more.
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Ohm's Law
Calculate voltage, current, resistance, and power using Ohm's Law and related formulas.
- → Ohm's Law Calculator
- → Electrical Power Calculator
- → Voltage Divider Calculator
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Wire & Cable
Wire sizing, voltage drop calculations, ampacity charts, and conduit fill calculators for electrical wiring.
- → Wire Size Calculator
- → Voltage Drop Calculator
- → Wire Ampacity Chart
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Resistor
Resistor color code decoder, SMD code calculator, LED resistor sizing, RC time constants, and inductance.
- → Resistor Color Code Calculator
- → SMD Resistor Code Calculator
- → LED Resistor Calculator