First Order Active Low Pass Filter Calculator Online

Unity Gain Non-Inverting Active 1st order LPF Calculator

Inputs:
f_c: Hz KHz MHz
C: µF nF pF

Theoretical Results:
R₁:

Non-Inverting Active 1st order LPF Calculator

Inputs:
f_c: Hz KHz MHz
C: µF nF pF
A_v:
R_F: Ω KΩ MΩ

Theoretical Results:
R:
R₁:

Inverting Active 1st order LPF Calculator

Inputs:
f_c: Hz KHz MHz
C₁: µF nF pF
A_v:

Theoretical Results:
R₂:
R₁:

The above online first order active filter calculator can be used to calculate resistor values for desired gain and cutoff frequency fc of the filter. The desired gain(A_v) in the passband, the feedback resistor value R_F, the cutoff frequency(fc) of the LPF, the capacitor value(C) are provided by the user.

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