Op-Amp gain calculator

Op-Amp Gain Calculator

Inverting / Non-inverting. Solve Gain, R_f, R_in, and V_out; rail/headroom check; estimate bandwidth from GBW; compare with nearest E-series resistors.

Configuration

What to solve

Input voltage (Vin)

|Gain| (magnitude)

Feedback resistor R_f

Input resistor R_in

Positive rail V₊ (optional)

Negative rail V₋ (optional)

Headroom margin (optional)

Load resistance (optional)

Op-amp GBW (gain-bandwidth)

Invalid or incomplete input for selected solve mode.

Precision:

Using your values (ideal)

Gain (signed)

Vout (ideal)

Output current (load)

Est. −3 dB BW (GBW/|Gain|)

Rail/headroom check

Using nearest standard

Nearest resistor series

R_f (nearest standard)

R_in (nearest standard)

Gain (rounded)

Vout (rounded)

Error vs target gain

Non-inverting: A = 1 + Rf/Rin. Inverting: A = −Rf/Rin. Estimated bandwidth: BW ≈ GBW/|A|. Rail check uses (V−+headroom) ≤ Vout ≤ (V+−headroom).

Op-Amp gain calculator