CircuitCalc — Fast, Accurate Electronics & Embedded Calculators

Resistance Power PCB Lighting

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CircuitCalc

Fast, accurate, zero-fluff calculators built for embedded engineers, hardware designers, and electronics hobbyists. No sign-ups. No popups. Pure bench utility.

Built with precision by Dgen Technologies

Passives & Codes

Resistor Color Code
SMD Resistor Code
Capacitor Code (EIA)
Inductor Color & SMD
Series & Parallel Network

Power, Timing & PCB

Ohm's Law & Power
Voltage Divider
RC Filter & Time (τ)
555 Timer Astable
PCB Trace Width (IPC)
Wire Gauge (AWG)

About & Legal

LED Series Resistor
Battery Life Estimator
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© 2026 CircuitCalc. All rights reserved. Calculations are intended for engineering reference.

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