Basic Circuit Calculators — Ohm's Law, Dividers & Power
Circuit calculator hub: parallel & series resistor total R, capacitor RC discharge time, dBm to watts & Ohm's law. Step-by-step DC & RF formulas.
Quick Answer
Ohm's Law: V = I × R. Voltage divider: Vout = Vin × R2/(R1+R2). Power: P = V × I. These three relationships solve most bench-level DC problems.
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Parallel & Series Resistor Calculator
Combine R values — product-over-sum & mixed layouts
Capacitor Discharge Time Calculator
RC bleeder resistor & safe discharge to 50 V
dBm to Watts Converter
50 dBm to watts & RF power reference table
Ohm's Law Calculator
Solve V, I, R or P after you know total resistance
Ohm's Law Calculator
Solve voltage, current, resistance, or power
Voltage Divider Calculator
Loaded and unloaded divider output voltage
Current Divider Calculator
Branch current in a parallel resistor network
Electrical Power Calculator
Calculate watts, voltage, current, or resistance