Op-Amp Calculator
Gain calculation for Non-Inverting operational amplifier circuits.
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Voltage Divider
Calculate Vout or resistor values for divider circuits.
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LED Resistor
Find the perfect series resistor for your LEDs.
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Ohm's Law
Calculate Voltage, Current, Resistance, or Power instantly.
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555 Timer Astable
Design oscillator circuits. Calculate Frequency & Duty Cycle.
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Resistor Colors
Visual 4-band and 5-band resistor value decoder.
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RC Time Constant
Calculate Tau (τ), charging time, and cutoff frequency.
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Battery Life
Estimate runtime for IoT and portable devices.
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PCB Trace Width
IPC-2221 standard calculator for current & trace width.
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