Op-amp gain calculator

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Result

Voltage gain−4.7
Output voltage−2.35 V
Gain in dB13.44 dB

Step-by-step solution

Inverting amplifier

A = −Rf/R1 = −47/10 = −4.7
Vout = A·Vin = −2.35 V

Key formulas

Inverting amplifier
Vout = −(Rf/Rin)·Vin
Non-inverting amplifier
Vout = (1 + Rf/R1)·Vin
Summing amplifier
Vout = −Rf(V1/R1 + V2/R2)
Ideal op-amp
V+ = V−, Iin = 0

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