Our free online Op-Amp Gain Calculator helps engineers and students quickly determine the voltage gain for both inverting and non-inverting operational amplifier configurations. Optimize your circuit designs and understand amplifier behavior with ease. Simply input your resistor values (Rf, Rin) and get instant results.
Formula:
Understanding Op-Amp Gain Formulas
The voltage gain of an operational amplifier (op-amp) circuit depends on its configuration and the values of its feedback and input resistors.
1. Non-Inverting Op-Amp Gain Formula:
The gain (Av) for a non-inverting op-amp configuration is given by:
Av = 1 + (Rf / Rin)
- Av: Voltage Gain (unitless)
- Rf: Feedback Resistor value (Ohms)
- Rin: Input Resistor value (Ohms)
2. Inverting Op-Amp Gain Formula:
The gain (Av) for an inverting op-amp configuration is given by:
Av = - (Rf / Rin)
- Av: Voltage Gain (unitless, the negative sign indicates a 180° phase shift)
- Rf: Feedback Resistor value (Ohms)
- Rin: Input Resistor value (Ohms)